Support for twisted cables.

Sweep now distbutes twists in proportion to segments lengths.
Added  spiral_paths(), segmented_path() and rounded_path_vertices() functions.
Added show_path(path) module.

CHANGELOG.md

@@ -3,6 +3,351 @@
 This changelog is generated by `changelog.py` using manually added semantic version tags to classify commits as breaking changes, additions or fixes.
 
 
+### [v19.6.0](https://github.com/nophead/NopSCADlib/releases/tag/v19.6.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v19.5.1...v19.6.0 "diff with v19.5.1")
+*   2022-02-06 [`225ea9b`](https://github.com/nophead/NopSCADlib/commit/225ea9b45160195bdf316e7ffdb383a63f898d3c "show commit") [C.P.](# "Chris Palmer") Added `rounded_path()` function to `sweep.scad`.
+
+#### [v19.5.1](https://github.com/nophead/NopSCADlib/releases/tag/v19.5.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v19.5.0...v19.5.1 "diff with v19.5.0")
+*   2022-02-06 [`d341ce4`](https://github.com/nophead/NopSCADlib/commit/d341ce499e56972ff5267d3187387fe7df9d4130 "show commit") [C.P.](# "Chris Palmer") Added `render()` to `pocket_handle()`.
+
+*   2022-02-06 [`e7376e2`](https://github.com/nophead/NopSCADlib/commit/e7376e28c44355efa425b98aa0511ccdf0b63301 "show commit") [C.P.](# "Chris Palmer") Fixed corner block assembly names when overridden.
+
+*   2022-02-06 [`e238eaa`](https://github.com/nophead/NopSCADlib/commit/e238eaa473bac72136507d15c57f6156560d6cfe "show commit") [C.P.](# "Chris Palmer") Removed unused, undocumented function.
+
+### [v19.5.0](https://github.com/nophead/NopSCADlib/releases/tag/v19.5.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v19.4.1...v19.5.0 "diff with v19.4.1")
+*   2022-02-01 [`04e94a8`](https://github.com/nophead/NopSCADlib/commit/04e94a859aa0d21f840c992b487a901f096790a4 "show commit") [C.P.](# "Chris Palmer") Added `earth_rot` parameter to `NEMA_screws()`.
+
+#### [v19.4.1](https://github.com/nophead/NopSCADlib/releases/tag/v19.4.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v19.4.0...v19.4.1 "diff with v19.4.0")
+*   2022-02-01 [`e696dc4`](https://github.com/nophead/NopSCADlib/commit/e696dc471845550eb94e1b648d8b109cc11a9bf1 "show commit") [C.P.](# "Chris Palmer") Fixed stupid bug in `euler()`.
+
+### [v19.4.0](https://github.com/nophead/NopSCADlib/releases/tag/v19.4.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v19.3.0...v19.4.0 "diff with v19.3.0")
+*   2022-01-29 [`f33a067`](https://github.com/nophead/NopSCADlib/commit/f33a0675f5b9f6a5ebe1c4b9755e894d1e2b7994 "show commit") [C.P.](# "Chris Palmer") Updated images and readme.
+
+*   2022-01-29 [`5223415`](https://github.com/nophead/NopSCADlib/commit/52234154294011d4cc312f9ff98716f484d20a41 "show commit") [C.P.](# "Chris Palmer") Ball bearing test now two rows.
+
+*   2022-01-28 [`f87f3f5`](https://github.com/nophead/NopSCADlib/commit/f87f3f51ee778ef7ca30319d1d6ff3f4013e8258 "show commit") [M.B.](# "Martin Budden") Added support for flanged bearings.
+Also added some new cartridge bearings.
+
+### [v19.3.0](https://github.com/nophead/NopSCADlib/releases/tag/v19.3.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v19.2.0...v19.3.0 "diff with v19.2.0")
+*   2022-01-29 [`1ee80f4`](https://github.com/nophead/NopSCADlib/commit/1ee80f4a908ff9939d06186f3b22f54f726fc4d2 "show commit") [C.P.](# "Chris Palmer") Ribbon clamps can now be made to hold multiple ribbons.
+
+*   2022-01-29 [`4340884`](https://github.com/nophead/NopSCADlib/commit/43408843af2c9b0924d4f5c29ff96644b5f48295 "show commit") [C.P.](# "Chris Palmer") `Butt_box` now has a `thin_blocks` property to make it use `2screw_blocks` instead of fixing blocks along the edges.
+
+*   2022-01-29 [`c4ccc30`](https://github.com/nophead/NopSCADlib/commit/c4ccc30b35f9b96c8b891efbe424a31bab7e1904 "show commit") [C.P.](# "Chris Palmer") Added `2screw_blocks,` a two screw version of corner blocks.
+
+*   2022-01-29 [`20db11f`](https://github.com/nophead/NopSCADlib/commit/20db11f81eb713b255c41e3be7e5b9c0373646de "show commit") [C.P.](# "Chris Palmer") Box top bezels can now be modified by adding a child that gets subtracted.
+
+*   2022-01-29 [`d82db46`](https://github.com/nophead/NopSCADlib/commit/d82db46ea11d99c92cd845a05cc6f9fc069f9497 "show commit") [C.P.](# "Chris Palmer") Added missing description for terminals.
+
+*   2022-01-26 [`ac58524`](https://github.com/nophead/NopSCADlib/commit/ac58524b8553d09356ca78e830c5ef47d1c1f05b "show commit") [C.P.](# "Chris Palmer") `Butt_box` `star_washers()` property renamed `bbox_star_washers()`.
+
+*   2022-01-26 [`ef06aa4`](https://github.com/nophead/NopSCADlib/commit/ef06aa43875aad40b016fb2939f256e074699bcf "show commit") [C.P.](# "Chris Palmer") `Butt_box` size and volume echo changed to show `Butt_box`.
+
+### [v19.2.0](https://github.com/nophead/NopSCADlib/releases/tag/v19.2.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v19.1.0...v19.2.0 "diff with v19.1.0")
+*   2022-01-25 [`d775a16`](https://github.com/nophead/NopSCADlib/commit/d775a16baa818e04d707e6759fe480bb88bf8b5f "show commit") [C.P.](# "Chris Palmer") Updated images and readme.
+
+*   2022-01-25 [`682b8ca`](https://github.com/nophead/NopSCADlib/commit/682b8caf4172d51de1ec191051da6eb432e1b35e "show commit") [C.P.](# "Chris Palmer") Removed CB- prefix from PSU descriptions.
+
+*   2022-01-25 [`c915dd8`](https://github.com/nophead/NopSCADlib/commit/c915dd8c5cc3dbc365ccc18a7a2fc00374fdafbe "show commit") [C.P.](# "Chris Palmer") Made `butt_box` example smaller to make room for more PSUs.
+
+*   2022-01-23 [`6805638`](https://github.com/nophead/NopSCADlib/commit/680563808aeb129e63de660df09c0c2d53775a65 "show commit") [M.B.](# "Martin Budden") Added ability to add PCB to PSU.
+Also added two slimline LED PSUs with PCBs and terminals at both ends.
+
+### [v19.1.0](https://github.com/nophead/NopSCADlib/releases/tag/v19.1.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v19.0.0...v19.1.0 "diff with v19.0.0")
+*   2022-01-25 [`127aab2`](https://github.com/nophead/NopSCADlib/commit/127aab2e7ab87ed801b9463d6437983646dacdb5 "show commit") [C.P.](# "Chris Palmer") Added test for terminals to get documentation.
+Updated images and readme.
+Note BigTreeTech Relay Module `v1.2` PCB added.
+
+*   2022-01-23 [`df3da13`](https://github.com/nophead/NopSCADlib/commit/df3da13d6b7c75f41aaf3e499815b51e39e06fea "show commit") [M.B.](# "Martin Budden") Added support for terminals on PCBs.
+
+## [v19.0.0](https://github.com/nophead/NopSCADlib/releases/tag/v19.0.0 "show release") Breaking Changes [...](https://github.com/nophead/NopSCADlib/compare/v18.4.0...v19.0.0 "diff with v18.4.0")
+*   2022-01-23 [`d4e8dd8`](https://github.com/nophead/NopSCADlib/commit/d4e8dd831187ea87ab8618f52541f3e53c0c17f8 "show commit") [C.P.](# "Chris Palmer") `Wire_hole_radius()` now rounded up to half mm diameters to match metric drills.
+`mouse_grommet` STL name is now based on the diameter instead of the radius.
+Added `mouse_grommet_length(r)` and documented `mouse_grommet_offset(r)`.
+
+### [v18.4.0](https://github.com/nophead/NopSCADlib/releases/tag/v18.4.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v18.3.2...v18.4.0 "diff with v18.3.2")
+*   2022-01-23 [`1928ec6`](https://github.com/nophead/NopSCADlib/commit/1928ec6fb162d44ffa2a8b37cdc5a064040e043c "show commit") [C.P.](# "Chris Palmer") Box can now be named to allow more than one in a project.
+`box_hole_inset(type)` documented.
+
+#### [v18.3.2](https://github.com/nophead/NopSCADlib/releases/tag/v18.3.2 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v18.3.1...v18.3.2 "diff with v18.3.1")
+*   2022-01-23 [`f4b9ab9`](https://github.com/nophead/NopSCADlib/commit/f4b9ab961cea8364eaf6b75cd308b91978234ae8 "show commit") [C.P.](# "Chris Palmer") Fixed `blower_exit_offset()` for square blowers with 2 screws.
+
+#### [v18.3.1](https://github.com/nophead/NopSCADlib/releases/tag/v18.3.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v18.3.0...v18.3.1 "diff with v18.3.0")
+*   2022-01-10 [`317b485`](https://github.com/nophead/NopSCADlib/commit/317b485ee1c17ef8f8004014a54f1c6706201932 "show commit") [C.P.](# "Chris Palmer") Updated the image.
+
+*   2022-01-11 [`ccf2b8e`](https://github.com/nophead/NopSCADlib/commit/ccf2b8e21b0b3a4d8ab72ea5cdecb0cdfb542e47 "show commit") [G.G.](# "Giampiero Gabbiani") Reverted PERF74x51
+
+*   2022-01-08 [`99f277d`](https://github.com/nophead/NopSCADlib/commit/99f277de8d71f289d1a7340995d25309369e145c "show commit") [G.G.](# "Giampiero Gabbiani") Fixed offset calculations
+
+*   2022-01-07 [`fe1ab5d`](https://github.com/nophead/NopSCADlib/commit/fe1ab5d59a5a4746a383111d1d2a558385f820f6 "show commit") [G.G.](# "Giampiero Gabbiani") Fixed grid origin offsets
+
+### [v18.3.0](https://github.com/nophead/NopSCADlib/releases/tag/v18.3.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v18.2.0...v18.3.0 "diff with v18.2.0")
+*   2022-01-10 [`49c2607`](https://github.com/nophead/NopSCADlib/commit/49c26079fea1be8eb4a69d7468fb12df4595ec4c "show commit") [C.P.](# "Chris Palmer") Added `M3x6_hex_pillar`.
+
+*   2022-01-10 [`b5ee63b`](https://github.com/nophead/NopSCADlib/commit/b5ee63bfc40b9ee698d44f435e58cfbc49ec259c "show commit") [C.P.](# "Chris Palmer") Added more documentation for microswitches.
+
+*   2022-01-10 [`a5bc80c`](https://github.com/nophead/NopSCADlib/commit/a5bc80c0e865335cde29db9203438fe4bc659f43 "show commit") [C.P.](# "Chris Palmer") Added `D_plug_d()` function.
+
+*   2022-01-10 [`bf8014f`](https://github.com/nophead/NopSCADlib/commit/bf8014fba0ed630898037712d2fdc432d7966d97 "show commit") [C.P.](# "Chris Palmer") Added `tubing_ir()` function.
+
+### [v18.2.0](https://github.com/nophead/NopSCADlib/releases/tag/v18.2.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v18.1.0...v18.2.0 "diff with v18.1.0")
+*   2021-12-14 [`608f0b2`](https://github.com/nophead/NopSCADlib/commit/608f0b2db052b0c79597be39de5e89b9989e9270 "show commit") [C.P.](# "Chris Palmer") Simplified teardrop top length calculation.
+
+*   2021-12-11 [`8682d0a`](https://github.com/nophead/NopSCADlib/commit/8682d0a4705ed2d85213d85702b5b9b039906f48 "show commit") [M.B.](# "Martin Budden") Allow configuration of teardrop angle.
+
+### [v18.1.0](https://github.com/nophead/NopSCADlib/releases/tag/v18.1.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v18.0.0...v18.1.0 "diff with v18.0.0")
+*   2021-12-14 [`abe1b1d`](https://github.com/nophead/NopSCADlib/commit/abe1b1db0157a86af14a68ec42bdaa3e079e73a3 "show commit") [C.P.](# "Chris Palmer") Updated readme.
+
+*   2021-12-14 [`71f935d`](https://github.com/nophead/NopSCADlib/commit/71f935de8e24673a10707cfe434a2faaf3de1c28 "show commit") [M.B.](# "Martin Budden") Corrected FOV handling.
+
+*   2021-08-09 [`4138ed4`](https://github.com/nophead/NopSCADlib/commit/4138ed438e1111bafbe3bee17021a922966c334b "show commit") [M.B.](# "Martin Budden") Added ability to display camera field of view.
+
+## [v18.0.0](https://github.com/nophead/NopSCADlib/releases/tag/v18.0.0 "show release") Breaking Changes [...](https://github.com/nophead/NopSCADlib/compare/v17.10.0...v18.0.0 "diff with v17.10.0")
+*   2021-12-12 [`970c538`](https://github.com/nophead/NopSCADlib/commit/970c5384960bb4c436cb789a1c5869c0a4adfaa5 "show commit") [C.P.](# "Chris Palmer") Updated images and readme.
+
+*   2021-12-12 [`cec790e`](https://github.com/nophead/NopSCADlib/commit/cec790ec09befd2631734cda88f3254043955638 "show commit") [M.B.](# "Martin Budden") Fixed y-carriage plain pulley and test.
+
+*   2021-11-27 [`e71db80`](https://github.com/nophead/NopSCADlib/commit/e71db80093e5131908dff4a6ecba02e5c213a7d8 "show commit") [M.B.](# "Martin Budden") Improvements to `core_xy`
+1. Better default parameters
+2. Changed `plain_idler_offset` to work in x and y, to facilitate larger idler pulleys
+
+### [v17.10.0](https://github.com/nophead/NopSCADlib/releases/tag/v17.10.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v17.9.0...v17.10.0 "diff with v17.9.0")
+*   2021-12-12 [`c31f58a`](https://github.com/nophead/NopSCADlib/commit/c31f58a4fdf5163dc56b98e89f1a98d08cdfded2 "show commit") [C.P.](# "Chris Palmer") Updated images and readme.
+
+*   2021-11-27 [`a280e1f`](https://github.com/nophead/NopSCADlib/commit/a280e1fcbd6fe068a186e5c9f609cff62b2974a4 "show commit") [M.B.](# "Martin Budden") Added GT2x9 belt.
+
+### [v17.9.0](https://github.com/nophead/NopSCADlib/releases/tag/v17.9.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v17.8.0...v17.9.0 "diff with v17.8.0")
+*   2021-12-11 [`a2dfaef`](https://github.com/nophead/NopSCADlib/commit/a2dfaef2b51ffec3f048f0af569b39e8a7dbbeaf "show commit") [C.P.](# "Chris Palmer") Updated readme.
+
+*   2021-11-16 [`9790bdd`](https://github.com/nophead/NopSCADlib/commit/9790bdda11573904bf87c655d1ab7b81736a45e0 "show commit") [M.B.](# "Martin Budden") Added function returning number of links in drag chain.
+
+### [v17.8.0](https://github.com/nophead/NopSCADlib/releases/tag/v17.8.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v17.7.2...v17.8.0 "diff with v17.7.2")
+*   2021-12-11 [`c4895f8`](https://github.com/nophead/NopSCADlib/commit/c4895f84c7cff48baa14040c2759da15d2a165be "show commit") [C.P.](# "Chris Palmer") Updated image and readme.
+
+*   2021-11-20 [`b1ad206`](https://github.com/nophead/NopSCADlib/commit/b1ad206ce4d29b61f3a9be15adde7f1a51c225b5 "show commit") [M.B.](# "Martin Budden") Rotated conical horihole.
+
+*   2021-11-20 [`da55f86`](https://github.com/nophead/NopSCADlib/commit/da55f86536746657a1e105858109f177d24c362e "show commit") [M.B.](# "Martin Budden") Added variant of drag chain without supports.
+Unsupported drag chain has conical pin and corresponding horihole and is printed with cutout facing upwards.
+
+ * Also made clearance a property of the drag chain so it can be altered for printing chain assemblies
+
+*   2021-12-11 [`43c78fd`](https://github.com/nophead/NopSCADlib/commit/43c78fd1a38de87a210a64c3587bc994731b41c6 "show commit") [C.P.](# "Chris Palmer") Annual image changes due to change of computer.
+
+#### [v17.7.2](https://github.com/nophead/NopSCADlib/releases/tag/v17.7.2 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v17.7.1...v17.7.2 "diff with v17.7.1")
+*   2021-11-13 [`74e5698`](https://github.com/nophead/NopSCADlib/commit/74e569896bd9b4f98bcd7c84322cd358fee8941f "show commit") [C.P.](# "Chris Palmer") Updated images.
+
+*   2021-11-01 [`ed6f8cf`](https://github.com/nophead/NopSCADlib/commit/ed6f8cf5c0877f7e8ad9323cc4fd3a6983a11080 "show commit") [M.B.](# "Martin Budden") Added shading to base of screw sockets to increase visibility.
+
+#### [v17.7.1](https://github.com/nophead/NopSCADlib/releases/tag/v17.7.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v17.7.0...v17.7.1 "diff with v17.7.0")
+*   2021-10-29 [`9464ad5`](https://github.com/nophead/NopSCADlib/commit/9464ad5dbf1c6befaa0059e7cc3f0988d5639173 "show commit") [C.P.](# "Chris Palmer") Fixed knob for pots with split shaft.
+Changed the order of `knob_for_pot()` parameters.
+
+### [v17.7.0](https://github.com/nophead/NopSCADlib/releases/tag/v17.7.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v17.6.0...v17.7.0 "diff with v17.6.0")
+*   2021-10-28 [`b424bea`](https://github.com/nophead/NopSCADlib/commit/b424bea622d5247fd1e2f1ddd51782aba55277e1 "show commit") [C.P.](# "Chris Palmer") Added printed knobs for pots.
+
+*   2021-10-28 [`c8d9bb7`](https://github.com/nophead/NopSCADlib/commit/c8d9bb7d094408f70cb91354895856cb915cfe00 "show commit") [C.P.](# "Chris Palmer") Potentiometers now create a BOM entry and have a value specified.
+
+### [v17.6.0](https://github.com/nophead/NopSCADlib/releases/tag/v17.6.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v17.5.0...v17.6.0 "diff with v17.5.0")
+*   2021-10-26 [`f5528c5`](https://github.com/nophead/NopSCADlib/commit/f5528c5a9a51abdd12443a677236ac8610206c20 "show commit") [C.P.](# "Chris Palmer") Single `7_segment` objects can now have multiple digits.
+This is deduced from the digit size compared to the overall size.
+The decimal point is now suppressed if there are not enough pins.
+Added 02531A and 02352A 3 digit displays.
+
+*   2021-10-26 [`09bce09`](https://github.com/nophead/NopSCADlib/commit/09bce09a85fee3f3ac684743467329c18f4ebb73 "show commit") [C.P.](# "Chris Palmer") Typo
+
+### [v17.5.0](https://github.com/nophead/NopSCADlib/releases/tag/v17.5.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v17.4.0...v17.5.0 "diff with v17.4.0")
+*   2021-10-24 [`bad33da`](https://github.com/nophead/NopSCADlib/commit/bad33da95eb3b20ccbb6e4906dccfe51e8f4372c "show commit") [C.P.](# "Chris Palmer") Updated images and readme.
+
+*   2021-10-21 [`427ef61`](https://github.com/nophead/NopSCADlib/commit/427ef610def6ef2744d565329069719e485a500e "show commit") [M.B.](# "Martin Budden") Allowed naming of magnets. Added radial encoder magnet.
+
+### [v17.4.0](https://github.com/nophead/NopSCADlib/releases/tag/v17.4.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v17.3.0...v17.4.0 "diff with v17.3.0")
+*   2021-10-24 [`f5d0bfb`](https://github.com/nophead/NopSCADlib/commit/f5d0bfb6c80111399f5fa2aeb8bab5bab9101285 "show commit") [C.P.](# "Chris Palmer") Fixed drill `center` parameter in `poly_drill()`.
+
+*   2021-10-24 [`b2117fa`](https://github.com/nophead/NopSCADlib/commit/b2117fa99a57341f9c93eed97c392c18173aa73c "show commit") [C.P.](# "Chris Palmer") `atx_psu_cutout(type)` now parametric and can be shown in the test.
+ATX300 PSU now has a correct cutout and more accurate grill holes.
+The four margins around grill holes can now be specified.
+
+*   2021-10-24 [`6687a4a`](https://github.com/nophead/NopSCADlib/commit/6687a4a7c62d526a5f376db903dcd74c4fb8a25c "show commit") [C.P.](# "Chris Palmer") Added `jack_4mm_flange_radius()`.
+
+*   2021-10-24 [`8524ddd`](https://github.com/nophead/NopSCADlib/commit/8524ddd34dd93d0bf5ddf538984809b8f0f8c986 "show commit") [C.P.](# "Chris Palmer") Foot now lowered by squeeze distance so the washer is visible.
+
+### [v17.3.0](https://github.com/nophead/NopSCADlib/releases/tag/v17.3.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v17.2.2...v17.3.0 "diff with v17.2.2")
+*   2021-10-20 [`21c0666`](https://github.com/nophead/NopSCADlib/commit/21c06667a3c5a0bc65440b990e28b8a2f93c7c32 "show commit") [C.P.](# "Chris Palmer") Added ATX300 PSU model.
+
+*   2021-10-20 [`d19fad3`](https://github.com/nophead/NopSCADlib/commit/d19fad3f9f7e6eba94b2005b4798b5914fff4b69 "show commit") [C.P.](# "Chris Palmer") PSU grills can now have different holes sizes, spacing, round or heaxagonal and avoid a list of rectangular regions.
+
+*   2021-10-20 [`172bfb1`](https://github.com/nophead/NopSCADlib/commit/172bfb16d8ec8ffee8b5185ef42867b37ab6bce1 "show commit") [C.P.](# "Chris Palmer") Added lugless pressfit IEC inlet.
+
+*   2021-10-09 [`491dbae`](https://github.com/nophead/NopSCADlib/commit/491dbae13b9ff2736324ff084c6a6f313b4a09fc "show commit") [C.P.](# "Chris Palmer") `screw_shorter_than()` will return 4 or 3 for short grub screws.
+
+#### [v17.2.2](https://github.com/nophead/NopSCADlib/releases/tag/v17.2.2 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v17.2.1...v17.2.2 "diff with v17.2.1")
+*   2021-10-02 [`046c475`](https://github.com/nophead/NopSCADlib/commit/046c475e1833c09a925a5310d1ccc6e4b07e7f89 "show commit") [M.B.](# "Martin Budden") Set convexity to 8 for `linear_extrude` of extrusion.
+
+#### [v17.2.1](https://github.com/nophead/NopSCADlib/releases/tag/v17.2.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v17.2.0...v17.2.1 "diff with v17.2.0")
+*   2021-10-06 [`5f72a12`](https://github.com/nophead/NopSCADlib/commit/5f72a1212514ee7f8a795b53b1d1d180329660df "show commit") [C.P.](# "Chris Palmer") Nuts shown on jacks and fuseholders only shown threaded when exploded.
+
+### [v17.2.0](https://github.com/nophead/NopSCADlib/releases/tag/v17.2.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v17.1.0...v17.2.0 "diff with v17.1.0")
+*   2021-10-06 [`82502eb`](https://github.com/nophead/NopSCADlib/commit/82502eb470127b28e4036821077cbdbd06c17e9e "show commit") [C.P.](# "Chris Palmer") Added `pot_nut()` module to draw potentiometer nuts and washers.
+
+### [v17.1.0](https://github.com/nophead/NopSCADlib/releases/tag/v17.1.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v17.0.1...v17.1.0 "diff with v17.0.1")
+*   2021-10-05 [`b541298`](https://github.com/nophead/NopSCADlib/commit/b541298eae361b80df3c6c5797f3940a37fc2a38 "show commit") [C.P.](# "Chris Palmer") Printed foot assembly can now omit the top washer when space is at a premium.
+Now correctly shows the screw in the squeezed position.
+
+*   2021-10-02 [`9884160`](https://github.com/nophead/NopSCADlib/commit/9884160ed5e8cd7d1f44c6fee950e3682714da9c "show commit") [C.P.](# "Chris Palmer") Updated the gallery
+
+#### [v17.0.1](https://github.com/nophead/NopSCADlib/releases/tag/v17.0.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v17.0.0...v17.0.1 "diff with v17.0.0")
+*   2021-10-01 [`38c973b`](https://github.com/nophead/NopSCADlib/commit/38c973b316a853fcbef3ccb857d99404a772d9dd "show commit") [C.P.](# "Chris Palmer") FR4 veroboard made the correct colour.
+veroboard track cuts made slightly bigger.
+
+*   2021-10-01 [`042d809`](https://github.com/nophead/NopSCADlib/commit/042d809ed056ba55c32f1d850b81dcf559fe9134 "show commit") [C.P.](# "Chris Palmer") Resistor and thermistor wires made more round.
+
+*   2021-10-01 [`3864839`](https://github.com/nophead/NopSCADlib/commit/3864839e521eb64189cba8453ea8835d6ffadd75 "show commit") [C.P.](# "Chris Palmer") Fixed encoder breakout descripion typo.
+
+*   2021-10-01 [`2ba2c2c`](https://github.com/nophead/NopSCADlib/commit/2ba2c2c115d4ab6c2371c662a3e54d7c77aa7785 "show commit") [C.P.](# "Chris Palmer") Removed some unused dependencies.
+
+## [v17.0.0](https://github.com/nophead/NopSCADlib/releases/tag/v17.0.0 "show release") Breaking Changes [...](https://github.com/nophead/NopSCADlib/compare/v16.2.0...v17.0.0 "diff with v16.2.0")
+*   2021-09-28 [`a5c4bf0`](https://github.com/nophead/NopSCADlib/commit/a5c4bf05adbf53cb7eb113db1139b65eb616a2e0 "show commit") [M.B.](# "Martin Budden") Added hot end style string literals following discussion.
+
+*   2021-09-28 [`a65add6`](https://github.com/nophead/NopSCADlib/commit/a65add65acdfeb97a657e03b9398d5376f497e85 "show commit") [M.B.](# "Martin Budden") Removed hotend global enums.
+
+### [v16.2.0](https://github.com/nophead/NopSCADlib/releases/tag/v16.2.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v16.1.0...v16.2.0 "diff with v16.1.0")
+*   2021-09-29 [`bab4c8e`](https://github.com/nophead/NopSCADlib/commit/bab4c8e8afcc9e96ada5ae8d7636f3f203c36a2c "show commit") [C.P.](# "Chris Palmer") `TO247_size()` now also returns lead height and the length of the wide bit.
+TO247 leads fixed at 3.
+Lead length removed from TO220 and TO247 vitamin string.
+
+### [v16.1.0](https://github.com/nophead/NopSCADlib/releases/tag/v16.1.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v16.0.3...v16.1.0 "diff with v16.0.3")
+*   2021-09-27 [`f16f7dd`](https://github.com/nophead/NopSCADlib/commit/f16f7ddb0943469a4e9aeb2aec9e6fc9e418c2dc "show commit") [C.P.](# "Chris Palmer") Images reverted to last OpenSCAD release versions.
+Mainly text spacing changes.
+
+*   2021-09-27 [`9b5ec6a`](https://github.com/nophead/NopSCADlib/commit/9b5ec6af1aba313df6812a5313470ebb7e8fbdd7 "show commit") [C.P.](# "Chris Palmer") Fixed new `rounded_polygon` to work with last OpenSCAD release.
+Trainling commas in `let()`.
+
+*   2021-09-27 [`50958b0`](https://github.com/nophead/NopSCADlib/commit/50958b064d5a6d5ca3fd6525a8c3d3a2c5b20199 "show commit") [C.P.](# "Chris Palmer") Added `$show_plugs` to show crude reprentations of housings on `pin_headers` and Molex KK headers.
+
+*   2021-09-27 [`c37373c`](https://github.com/nophead/NopSCADlib/commit/c37373c920d3b438895ef535b0c06d0d00675609 "show commit") [C.P.](# "Chris Palmer") Added `TO247()` and `TO247_size()` to `component.scad`.
+
+*   2021-09-27 [`700f5a2`](https://github.com/nophead/NopSCADlib/commit/700f5a2205173e12fad42df2f57d2c105608204e "show commit") [C.P.](# "Chris Palmer") `fanguard()` can now be made without screw holes to get just the grill.
+
+*   2021-09-27 [`4993c3e`](https://github.com/nophead/NopSCADlib/commit/4993c3e82deffd933a81e39b670bb14886790b5f "show commit") [C.P.](# "Chris Palmer") Module blurb parenthesis parsing is now greedy to handle args that default to function calls.
+This means that library modules cannot be one liners.
+
+*   2021-09-26 [`c6b280f`](https://github.com/nophead/NopSCADlib/commit/c6b280f0e8d6780394bf63fc7efa9c1075589abe "show commit") [C.P.](# "Chris Palmer") `_box_assembly()` fix for corners `=` 0.
+
+*   2021-09-26 [`6012787`](https://github.com/nophead/NopSCADlib/commit/601278778147c66288049b768be291c714fde6e0 "show commit") [C.P.](# "Chris Palmer") Added `jack_4mm_plastic()`.
+
+*   2021-09-26 [`30db660`](https://github.com/nophead/NopSCADlib/commit/30db66034c7fedf0f07b542908a07f73efd9dc08 "show commit") [C.P.](# "Chris Palmer") `Rounded_polygons` are now generated by a function returning a point list.
+The module version simply passes this to polygon.
+The arcs now sections of a `circle4n()` rather than a `circle()`.
+
+#### [v16.0.3](https://github.com/nophead/NopSCADlib/releases/tag/v16.0.3 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v16.0.2...v16.0.3 "diff with v16.0.2")
+*   2021-09-16 [`f6aa3b3`](https://github.com/nophead/NopSCADlib/commit/f6aa3b342650062cd8947aa36e2ae93242752d4b "show commit") [C.P.](# "Chris Palmer") `fuseholder_hole()` now makes a `poly_hole` when `cnc_bit_r` is 0.
+
+*   2021-09-16 [`91c8c7b`](https://github.com/nophead/NopSCADlib/commit/91c8c7bf4d67cf93c47f41cd5984cb23271205cb "show commit") [C.P.](# "Chris Palmer") `cnc_bit_r` is now set to zero in stl(), so holes are suitable for 3D printing rather than routing.
+
+*   2021-09-16 [`dc93b8d`](https://github.com/nophead/NopSCADlib/commit/dc93b8dcdf484dbb50cdee5908a91a3f322e6610 "show commit") [C.P.](# "Chris Palmer") Added platters and extrusion overrides to the example project.
+
+#### [v16.0.2](https://github.com/nophead/NopSCADlib/releases/tag/v16.0.2 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v16.0.1...v16.0.2 "diff with v16.0.1")
+*   2021-09-14 [`119c2cb`](https://github.com/nophead/NopSCADlib/commit/119c2cb6f46ea00c9238da6d98305e6479f0452c "show commit") [C.P.](# "Chris Palmer") Can now make perfboards with screws holes only at one end.
+`I.e`. for making models of chopped down boards.
+
+*   2021-09-14 [`24b3915`](https://github.com/nophead/NopSCADlib/commit/24b391578b1b68f1c65eb9c48458151a80ceaf5f "show commit") [C.P.](# "Chris Palmer") Fixed recently created bug trying to delete non-existent thumbnail diffs.
+
+#### [v16.0.1](https://github.com/nophead/NopSCADlib/releases/tag/v16.0.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v16.0.0...v16.0.1 "diff with v16.0.0")
+*   2021-09-12 [`f0c25d3`](https://github.com/nophead/NopSCADlib/commit/f0c25d37b0c19f76c3f3e0b4d9cabc7587f9efb5 "show commit") [C.P.](# "Chris Palmer") Workarounds for bugs in the OpenSCAD snapshots.
+
+## [v16.0.0](https://github.com/nophead/NopSCADlib/releases/tag/v16.0.0 "show release") Breaking Changes [...](https://github.com/nophead/NopSCADlib/compare/v15.25.0...v16.0.0 "diff with v15.25.0")
+*   2021-09-11 [`3299aad`](https://github.com/nophead/NopSCADlib/commit/3299aad5c83d1fe21d3bdddd1450f8de19078d13 "show commit") [C.P.](# "Chris Palmer") Parametric potentiometers added, changes PCB "potentiometer" parameters.
+The first one is now the type that defaults to the previous BigTreeTech version.
+The second parameter is the shaft length override.
+
+ * Added `ESP32_DOIT_V1,` ArduinoNano and `KY_040` breakout PCBs.
+
+*   2021-09-11 [`74c52aa`](https://github.com/nophead/NopSCADlib/commit/74c52aac0428995930b4af562a480025003b992d "show commit") [C.P.](# "Chris Palmer") Can now make perfboard without screw holes.
+Fixed missing items from last commit.
+
+*   2021-09-11 [`726d9ed`](https://github.com/nophead/NopSCADlib/commit/726d9ed2dc921b5a7ef8c5b0fa6b17628f706bf8 "show commit") [C.P.](# "Chris Palmer") Can now draw right angle Molex KK connectors and can skip pins to allow high voltage.
+
+*   2021-09-11 [`8a838dd`](https://github.com/nophead/NopSCADlib/commit/8a838dd1ceaac7d595aea47494cb28b9a424ee8a "show commit") [C.P.](# "Chris Palmer") Added `pcb_grid_components()` module for placing parts on a perfboard.
+
+*   2021-09-11 [`181c6ac`](https://github.com/nophead/NopSCADlib/commit/181c6ac6248e7db6204b6d461f122e719492b0cc "show commit") [C.P.](# "Chris Palmer") Added `vero_pin` PCB component.
+
+*   2021-09-11 [`e952aa7`](https://github.com/nophead/NopSCADlib/commit/e952aa7840cf4f3765c518a481d32f582bef27b4 "show commit") [C.P.](# "Chris Palmer") PCB chip component can now be round if width is zero to fake round buttons.
+
+*   2021-09-11 [`466ee31`](https://github.com/nophead/NopSCADlib/commit/466ee31e10e670ff35e22429084a34612f821f7d "show commit") [C.P.](# "Chris Palmer") Added `Jack_4mm_shielded_nut_radius()`.
+
+*   2021-09-11 [`4c926c5`](https://github.com/nophead/NopSCADlib/commit/4c926c529b199dbe589fb0c43f323db94ffe5597 "show commit") [C.P.](# "Chris Palmer") Fixed axial lead min pitch bug.
+
+*   2021-09-11 [`edb1ecc`](https://github.com/nophead/NopSCADlib/commit/edb1eccbf156ff4b06723b18f832637328b1c3e0 "show commit") [C.P.](# "Chris Palmer") TFT128x160 LCD display added.
+
+*   2021-09-11 [`061812c`](https://github.com/nophead/NopSCADlib/commit/061812cc8bc51e5a957d7d3acaffd9bcda14cc15 "show commit") [C.P.](# "Chris Palmer") PMMA1p25 sheet added.
+
+*   2021-09-11 [`ce0c97b`](https://github.com/nophead/NopSCADlib/commit/ce0c97b45e6e501554e66bcd4140d4dd3f532a1c "show commit") [C.P.](# "Chris Palmer") `7_segment` displays added as PCB component.
+
+### [v15.25.0](https://github.com/nophead/NopSCADlib/releases/tag/v15.25.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v15.24.0...v15.25.0 "diff with v15.24.0")
+*   2021-09-05 [`2166a9b`](https://github.com/nophead/NopSCADlib/commit/2166a9be6a6fc75b06f0051971606cd181079e15 "show commit") [C.P.](# "Chris Palmer") `extrusion_corner_bracket_assembly()` and `extrusion_inner_corner_bracket()` can now be passed the extrusion type.
+E2020t and E4040t thinner extrusions added to work with the brackets.
+Extrusions can now have recessed channels, round or square centre sections and holes.
+Fixed the shape of extrusion centre section spars.
+T-nuts now have 45 degree chamfers instead of a fixed 1mm minimum thickness.
+
+*   2021-09-03 [`5117290`](https://github.com/nophead/NopSCADlib/commit/511729008dcc878a148c3bbd00edf69de9736fb5 "show commit") [C.P.](# "Chris Palmer") Added missing documentation for `sliding_t_nut()`.
+
+*   2021-09-03 [`5111ec0`](https://github.com/nophead/NopSCADlib/commit/5111ec04bc1d19cc46b811bf79d026fcd2ca70f8 "show commit") [C.P.](# "Chris Palmer") `E40_corner_bracket,` `E40_corner_bracket` and `M8_sliding_ball_t_nut` added.
+Inner corner brackets now show the long arm with chamfered ridges rather
+than a normal T-nut and the grub screws are inserted to meet the extrusion.
+
+### [v15.24.0](https://github.com/nophead/NopSCADlib/releases/tag/v15.24.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v15.23.0...v15.24.0 "diff with v15.23.0")
+*   2021-08-31 [`d9af5b7`](https://github.com/nophead/NopSCADlib/commit/d9af5b7f705791ca8ef230ecd1b831c042587002 "show commit") [C.P.](# "Chris Palmer") Updated images and readme.
+
+*   2021-08-31 [`9d65f69`](https://github.com/nophead/NopSCADlib/commit/9d65f69bf3e7cd325d24bc5410a4763bb7164b8f "show commit") [M.B.](# "Martin Budden") Added `M2p5_dome_screw`.
+
+### [v15.23.0](https://github.com/nophead/NopSCADlib/releases/tag/v15.23.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v15.22.0...v15.23.0 "diff with v15.22.0")
+*   2021-08-31 [`00c5c90`](https://github.com/nophead/NopSCADlib/commit/00c5c90a5e74f47f0e6f5e3a7996f70fa34f0833 "show commit") [C.P.](# "Chris Palmer") Updated big picture
+
+*   2021-08-31 [`01c26d8`](https://github.com/nophead/NopSCADlib/commit/01c26d8a349e802738a8b0d06575a3e6915bf070 "show commit") [C.P.](# "Chris Palmer") Added Lichuan servo motors contributed by Niclas Hedhman.
+
+*   2021-08-31 [`ef21024`](https://github.com/nophead/NopSCADlib/commit/ef2102420b15e5be4008a6a3cecf5416857265f9 "show commit") [C.P.](# "Chris Palmer") Added NEMA8 and NEMA8BH stepper motors.
+Steppers can now have dual shafts, hollow shafts and black end caps.
+
+*   2021-08-31 [`540f841`](https://github.com/nophead/NopSCADlib/commit/540f84116355e7f44a9b5796816d1e3422128ff3 "show commit") [C.P.](# "Chris Palmer") Added crude representation of JST ZH connectors.
+
+*   2021-08-31 [`1045502`](https://github.com/nophead/NopSCADlib/commit/1045502efb1cb94fb7bcc11fd4483b425a880926 "show commit") [C.P.](# "Chris Palmer") Added more aluminium sheet thickness
+
+*   2021-08-31 [`485184f`](https://github.com/nophead/NopSCADlib/commit/485184f09213ff0b191d5c8339471cd24ba3cc90 "show commit") [C.P.](# "Chris Palmer") Added HGH15CA and HGH20CA rails.
+
+*   2021-08-31 [`b893c90`](https://github.com/nophead/NopSCADlib/commit/b893c9069a6bae762733cf1e139d49bab28ad792 "show commit") [C.P.](# "Chris Palmer") Added SFU1610 ballscrew nut
+
+*   2021-08-31 [`69f4ced`](https://github.com/nophead/NopSCADlib/commit/69f4ced29da7e37c88ca24b924c6430144eec849 "show commit") [C.P.](# "Chris Palmer") Added `M8_cs_cap_screw,` `M5_grub_screw` and `M6_grub_screw`.
+Fixed `M6_cs_cap_screw` and `M4_grub_screw` socket sizes.
+
+*   2021-08-31 [`5c1aa84`](https://github.com/nophead/NopSCADlib/commit/5c1aa849fe5992617c3128c47dfc969504cbfd2f "show commit") [C.P.](# "Chris Palmer") New layout for big picture.
+
+### [v15.22.0](https://github.com/nophead/NopSCADlib/releases/tag/v15.22.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v15.21.1...v15.22.0 "diff with v15.21.1")
+*   2021-08-27 [`1247303`](https://github.com/nophead/NopSCADlib/commit/1247303cb9dc2694994993b5dc046683becb7fde "show commit") [C.P.](# "Chris Palmer") Updated images and readme.
+
+*   2021-08-13 [`14ab1bb`](https://github.com/nophead/NopSCADlib/commit/14ab1bb8b614055e0bf4ad33799276b0017ca13e "show commit") [M.B.](# "Martin Budden") Added Raspberry Pi Pico.
+
+#### [v15.21.1](https://github.com/nophead/NopSCADlib/releases/tag/v15.21.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v15.21.0...v15.21.1 "diff with v15.21.0")
+*   2021-08-09 [`be53547`](https://github.com/nophead/NopSCADlib/commit/be53547728834d8e786ad4cb5637c768320a3105 "show commit") [M.B.](# "Martin Budden") Fixed display of BLDC prop shaft when thread length `=` 0.
+
+*   2021-07-04 [`ba7d7d3`](https://github.com/nophead/NopSCADlib/commit/ba7d7d32adf554d163143c0ae1707565340bb35b "show commit") [C.P.](# "Chris Palmer") Updated chnagelog.
+
+### [v15.21.0](https://github.com/nophead/NopSCADlib/releases/tag/v15.21.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v15.20.0...v15.21.0 "diff with v15.20.0")
+*   2021-07-01 [`df35e14`](https://github.com/nophead/NopSCADlib/commit/df35e14fc71794c3826d6c99ce3cab93a4cfa5fe "show commit") [M.B.](# "Martin Budden") Improved handling of pcb plating colour.
+
+### [v15.20.0](https://github.com/nophead/NopSCADlib/releases/tag/v15.20.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v15.19.3...v15.20.0 "diff with v15.19.3")
+*   2021-06-29 [`c982876`](https://github.com/nophead/NopSCADlib/commit/c982876ebc0f95b466de1af3c80642dfd88800e6 "show commit") [C.P.](# "Chris Palmer") Can now specify the screw used for PSU shrouds and get the wall thickness.
+
+#### [v15.19.3](https://github.com/nophead/NopSCADlib/releases/tag/v15.19.3 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v15.19.2...v15.19.3 "diff with v15.19.2")
+*   2021-06-17 [`92d0444`](https://github.com/nophead/NopSCADlib/commit/92d0444e5f96c8f4768afb3d014044d7e66c6e69 "show commit") [C.P.](# "Chris Palmer") Changelog now runs codespell to fix the spellings in the commit comments.
+
+#### [v15.19.2](https://github.com/nophead/NopSCADlib/releases/tag/v15.19.2 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v15.19.1...v15.19.2 "diff with v15.19.1")
+*   2021-06-15 [`8d7c44b`](https://github.com/nophead/NopSCADlib/commit/8d7c44b80deffcc8c6b84c7a6485c959826cb381 "show commit") [M.B.](# "Martin Budden") Spelling corrections.
+
+#### [v15.19.1](https://github.com/nophead/NopSCADlib/releases/tag/v15.19.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v15.19.0...v15.19.1 "diff with v15.19.0")
+*   2021-06-17 [`d38055c`](https://github.com/nophead/NopSCADlib/commit/d38055c15c8b00f91f9c5a4749264acc9b123aad "show commit") [C.P.](# "Chris Palmer") Updated readme.
+
+*   2021-06-11 [`dcfe426`](https://github.com/nophead/NopSCADlib/commit/dcfe4262c519fb750702564309b790cda5b1c090 "show commit") [M.B.](# "Martin Budden") Fixed typos.
+
 ### [v15.19.0](https://github.com/nophead/NopSCADlib/releases/tag/v15.19.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v15.18.0...v15.19.0 "diff with v15.18.0")
 *   2021-06-17 [`c7a6d81`](https://github.com/nophead/NopSCADlib/commit/c7a6d8164f545e83c4d871080ac63b7d903829df "show commit") [C.P.](# "Chris Palmer") Added `molex_usb_Ax1()` and now shows SMT caps in the PCB test.
 
@@ -187,7 +532,7 @@ Breaking change in `belt_length();` now requires a type argument
 
 ## [v14.0.0](https://github.com/nophead/NopSCADlib/releases/tag/v14.0.0 "show release") Breaking Changes [...](https://github.com/nophead/NopSCADlib/compare/v13.5.0...v14.0.0 "diff with v13.5.0")
 *   2021-03-06 [`298d1f9`](https://github.com/nophead/NopSCADlib/commit/298d1f92841f30e13b437c6770fc113954b94108 "show commit") [C.P.](# "Chris Palmer") Interface is the same but filenames to be included or used changed.
-Changlog upated.
+Changelog updated.
 
 *   2021-03-06 [`491c3b4`](https://github.com/nophead/NopSCADlib/commit/491c3b4ea8d2ef51e55fd389f0dc0b9a6b9bd9a4 "show commit") [C.P.](# "Chris Palmer") Updated readme, `lib.scad` and image.
 
@@ -223,7 +568,7 @@ Changlog upated.
 
 *   2021-03-03 [`614e5f3`](https://github.com/nophead/NopSCADlib/commit/614e5f3a72db309a3dee996d7241317556883e8d "show commit") [C.P.](# "Chris Palmer") Issues in the changelog now link to to the issue.
 
-*   2021-03-03 [`a7eae4f`](https://github.com/nophead/NopSCADlib/commit/a7eae4f549b51dbe4624a8b67012919cef6cb24a "show commit") [C.P.](# "Chris Palmer") Neater changlog format.
+*   2021-03-03 [`a7eae4f`](https://github.com/nophead/NopSCADlib/commit/a7eae4f549b51dbe4624a8b67012919cef6cb24a "show commit") [C.P.](# "Chris Palmer") Neater changelog format.
 
 *   2021-03-03 [`31ab856`](https://github.com/nophead/NopSCADlib/commit/31ab8562a783464f93812b8c7c45d403587efd0a "show commit") [C.P.](# "Chris Palmer") Updated images
 
@@ -246,7 +591,7 @@ Changlog upated.
 *   2021-02-20 [`03a0c2f`](https://github.com/nophead/NopSCADlib/commit/03a0c2fe981ce12cda51a693f69b4fb19696cb8a "show commit") [C.P.](# "Chris Palmer") Fixed typo.
 
 ### [v13.3.0](https://github.com/nophead/NopSCADlib/releases/tag/v13.3.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v13.2.0...v13.3.0 "diff with v13.2.0")
-*   2021-02-20 [`7c2df8d`](https://github.com/nophead/NopSCADlib/commit/7c2df8d36d214a8bf8ebdcd39da293209bc175ab "show commit") [C.P.](# "Chris Palmer") The pose module can now specify the camera distance supressing viewall and
+*   2021-02-20 [`7c2df8d`](https://github.com/nophead/NopSCADlib/commit/7c2df8d36d214a8bf8ebdcd39da293209bc175ab "show commit") [C.P.](# "Chris Palmer") The pose module can now specify the camera distance suppressing viewall and
 autocentre.
 
 ### [v13.2.0](https://github.com/nophead/NopSCADlib/releases/tag/v13.2.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v13.1.0...v13.2.0 "diff with v13.1.0")
@@ -541,9 +886,9 @@ Updated pics and readme.
 *   2020-12-28 [`ba586b3`](https://github.com/nophead/NopSCADlib/commit/ba586b368582db163af143ebb60afed270f77b1c "show commit") [C.P.](# "Chris Palmer") Example images update to match new contersink screws and teardrops.
 
 ### [v10.21.0](https://github.com/nophead/NopSCADlib/releases/tag/v10.21.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v10.20.1...v10.21.0 "diff with v10.20.1")
-*   2020-12-28 [`8d22940`](https://github.com/nophead/NopSCADlib/commit/8d22940506df525ac52ef6f8a00ea03661f3b682 "show commit") [C.P.](# "Chris Palmer") Project blurb can now be split with into sections with markdown horizonal rules
+*   2020-12-28 [`8d22940`](https://github.com/nophead/NopSCADlib/commit/8d22940506df525ac52ef6f8a00ea03661f3b682 "show commit") [C.P.](# "Chris Palmer") Project blurb can now be split with into sections with markdown horizontal rules
 made with asterisks.
-If an image is include in the first section the default image is supressed.
+If an image is include in the first section the default image is suppressed.
 
 #### [v10.20.1](https://github.com/nophead/NopSCADlib/releases/tag/v10.20.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v10.20.0...v10.20.1 "diff with v10.20.0")
 *   2020-12-26 [`87c8bbb`](https://github.com/nophead/NopSCADlib/commit/87c8bbb9a549aabb84004426332dc964583472c5 "show commit") [M.B.](# "Martin Budden") Fixed error in `carriage_size` function.
@@ -558,12 +903,12 @@ If an image is include in the first section the default image is supressed.
 
 ### [v10.20.0](https://github.com/nophead/NopSCADlib/releases/tag/v10.20.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v10.19.0...v10.20.0 "diff with v10.19.0")
 *   2020-12-24 [`6f8ff60`](https://github.com/nophead/NopSCADlib/commit/6f8ff606fa5b2ef7d81fb687b77bd6236f6d277f "show commit") [C.P.](# "Chris Palmer") Removed `woven_sheet()` from the readme.
-Removed redundent code.
+Removed redundant code.
 
 *   2020-12-24 [`acd5de0`](https://github.com/nophead/NopSCADlib/commit/acd5de0fbd513b67387478b4c89a5ef4f11b440b "show commit") [C.P.](# "Chris Palmer") Fixed extra BOM entries for woven sheet.
 Added render colour to BOM for 3D sheets.
 
-*   2020-12-23 [`cc1e3ba`](https://github.com/nophead/NopSCADlib/commit/cc1e3baaf6ba7451b3545efc949015af822dc95c "show commit") [C.P.](# "Chris Palmer") Reimplemeted woven sheets with an eye to speed and interface consistancy.
+*   2020-12-23 [`cc1e3ba`](https://github.com/nophead/NopSCADlib/commit/cc1e3baaf6ba7451b3545efc949015af822dc95c "show commit") [C.P.](# "Chris Palmer") Reimplemeted woven sheets with an eye to speed and interface consistency.
 
 *   2020-12-13 [`85cb54e`](https://github.com/nophead/NopSCADlib/commit/85cb54ef318597a4922077785247ddcb08d5e00d "show commit") [M.B.](# "Martin Budden") Added sheet with checkerboard texture to simulate carbon fiber.
 
@@ -1028,7 +1373,7 @@ Done to reduced the number of global constants.
 `Panel_meters` can now have inner apertures and buttons.
 
 ### [v7.2.0](https://github.com/nophead/NopSCADlib/releases/tag/v7.2.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v7.1.1...v7.2.0 "diff with v7.1.1")
-*   2020-05-02 [`baa737c`](https://github.com/nophead/NopSCADlib/commit/baa737c4d83be0ab38685122ebe535872fe63e20 "show commit") [C.P.](# "Chris Palmer") Updated example to use Foot contructor.
+*   2020-05-02 [`baa737c`](https://github.com/nophead/NopSCADlib/commit/baa737c4d83be0ab38685122ebe535872fe63e20 "show commit") [C.P.](# "Chris Palmer") Updated example to use Foot constructor.
 
 *   2020-05-02 [`70b13d2`](https://github.com/nophead/NopSCADlib/commit/70b13d2f2723caa18a69afb7a179d88366c82c51 "show commit") [C.P.](# "Chris Palmer") Added functions to create property lists that are created by the client.
 Foot, box, bbox, pbox, `flat_hinge` and `strap_handle`.
@@ -1232,7 +1577,7 @@ The implementation files are still lower case for backwards compatibility.
 
 *   2020-03-03 [`bd60b50`](https://github.com/nophead/NopSCADlib/commit/bd60b50b099d76f6588ddfe900be276ed7d0cf98 "show commit") [C.P.](# "Chris Palmer") Removed lower case tests
 
-*   2020-03-03 [`4d51cb7`](https://github.com/nophead/NopSCADlib/commit/4d51cb73f3d2b3a92ac4c12a2002bc4918228969 "show commit") [C.P.](# "Chris Palmer") Table of contents now has three vitamin coloumns
+*   2020-03-03 [`4d51cb7`](https://github.com/nophead/NopSCADlib/commit/4d51cb73f3d2b3a92ac4c12a2002bc4918228969 "show commit") [C.P.](# "Chris Palmer") Table of contents now has three vitamin columns
 
 *   2020-03-02 [`3b77c97`](https://github.com/nophead/NopSCADlib/commit/3b77c975325851caf5e602ae6ceaa8e5d9126425 "show commit") [C.P.](# "Chris Palmer") Example now include `core.scad` instead of `lib.scad`.
 
@@ -1509,7 +1854,7 @@ This means 5mm, 6mm etc comes before 10mm in BOM.
 
 *   2020-01-11 [`d1324a6`](https://github.com/nophead/NopSCADlib/commit/d1324a670eb7ec898e6663dc9394fc1bd19ef664 "show commit") [M.B.](# "Martin Budden") Added JST-XH connector for pcbs.
 
-*   2020-02-22 [`599fbba`](https://github.com/nophead/NopSCADlib/commit/599fbba6c2b036a4a22fa04f2e06f67ef5bb9578 "show commit") [C.P.](# "Chris Palmer") Reduced dependecies in `pcb_mount` test.
+*   2020-02-22 [`599fbba`](https://github.com/nophead/NopSCADlib/commit/599fbba6c2b036a4a22fa04f2e06f67ef5bb9578 "show commit") [C.P.](# "Chris Palmer") Reduced dependencies in `pcb_mount` test.
 
 ### [v2.19.0](https://github.com/nophead/NopSCADlib/releases/tag/v2.19.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v2.16.0...v2.19.0 "diff with v2.16.0")
 *   2020-02-22 [`6097e07`](https://github.com/nophead/NopSCADlib/commit/6097e0709498166c61712094fcc11f083e25959f "show commit") [C.P.](# "Chris Palmer") Updated images and readme.
@@ -1825,7 +2170,7 @@ IEC screw length fixed at 10 if inserts used.
 *   2019-06-14 [`a51e96e`](https://github.com/nophead/NopSCADlib/commit/a51e96ec433c6d347e0d313573585cda9978e7b4 "show commit") [C.P.](# "Chris Palmer") Nuts now show their thickness on the BOM so half nuts have a different description.
 
 ## [v1.0.0](https://github.com/nophead/NopSCADlib/releases/tag/v1.0.0 "show release") Breaking Changes [...](https://github.com/nophead/NopSCADlib/compare/v0.0.1...v1.0.0 "diff with v0.0.1")
-*   2019-06-14 [`b719601`](https://github.com/nophead/NopSCADlib/commit/b719601a645d899f5477c13a34f857d178bcc3a1 "show commit") [C.P.](# "Chris Palmer") Fixed cable strip parameters and BOM desciption
+*   2019-06-14 [`b719601`](https://github.com/nophead/NopSCADlib/commit/b719601a645d899f5477c13a34f857d178bcc3a1 "show commit") [C.P.](# "Chris Palmer") Fixed cable strip parameters and BOM description
 
 #### [v0.0.1](https://github.com/nophead/NopSCADlib/releases/tag/v0.0.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v0.0.0...v0.0.1 "diff with v0.0.0")
 *   2019-06-14 [`5ede2d0`](https://github.com/nophead/NopSCADlib/commit/5ede2d0895a8a813ef2bc47bf94462d668bc440b "show commit") [C.P.](# "Chris Palmer") Smooth pulleys now show their OD on the BOM.

examples/MainsBreakOutBox/platters/all.scad

@@ -0,0 +1,11 @@
+include <NopSCADlib/core.scad>
+
+*use_stl("socket_box"); // Importing the STL gives a CGAL error although NetFabb finds nothing wrong with it.
+
+use <../scad/bob_main.scad>
+
+render() socket_box_stl();
+
+for(i = [0 : 3])
+    translate([i * 25 - 1.5 * 25, -70])
+        use_stl("foot");

examples/MainsBreakOutBox/scad/bob_main.scad

@@ -31,7 +31,8 @@
 //! while its earth is disconnected. Don't be tempted to float the earth of an oscilloscope this way, use a mains isolation transformer to power the DUT instead.
 //! Earth leakage can be measured Canadian CSA style by disconnected the neutral link from the left socket and linking the central neutral to the live.
 //
-$extrusion_width = 0.5;
+$extrusion_width = 0.4;
+$layer_height = 0.2;
 $pp1_colour = "dimgrey";
 $pp2_colour = [0.9, 0.9, 0.9];
 

examples/MainsBreakOutBox/stls/deps/all.txt

@@ -0,0 +1,5 @@
+socket_box.stl
+foot.stl
+foot.stl
+foot.stl
+foot.stl

gallery/readme.md

@@ -25,6 +25,11 @@ WiFi controllable PSU
 
 ![](IOT_50V_PSU.png)
 
+## IOT LOAD
+WiFi controllable programmable load
+
+![](IOT_LOAD.png)
+
 ## Lab ATX PSU
 Bench power supply built around an ATX PSU.
 
@@ -65,6 +70,16 @@ Mains isolated and variable supply with metering.
 
 
 
+## PSU Cover
+A base and shroud to make PSU safe to sit on a desk
+
+![](PSU_cover.png)
+
+## PotBox
+Potentiometer box with course and fine controls and three 4mm binding posts
+
+![](PotBox.png)
+
 ## SunBot
 A solar tracker to keep a solar panel pointing at the sun.
 

global_defs.scad

@@ -24,23 +24,23 @@
 //  bom defaults to 0
 //  Setting $bom on the command line or in the main file before including lib.scad overrides it everywhere.
 //  Setting $bom after including lib overrides bom in the libs but not in the local file.
-//  Setting $_bom in the local file overrides it in the local file but not in the libs.
 //
 rr_green = [0, 146/255, 0];                                               // RepRap logo colour
 crimson  = [220/255, 20/255, 60/255];
 
-$_bom           = is_undef($bom)             ? 0      : $bom;             // 0 no bom, 1 assemblies and stls, 2 vitamins as well
-$exploded       = is_undef($explode)         ? 0      : $explode;         // 1 for exploded view
 layer_height    = is_undef($layer_height)    ? 0.25   : $layer_height;    // layer height when printing
 extrusion_width = is_undef($extrusion_width) ? 0.5    : $extrusion_width; // filament width when printing
 nozzle          = is_undef($nozzle)          ? 0.45   : $nozzle;          // 3D printer nozzle
 cnc_bit_r       = is_undef($cnc_bit_r)       ? 1.2    : $cnc_bit_r;       // minimum tool radius when milling 2D objects
-pp1_colour      = is_undef($pp1_colour)      ? rr_green : $pp1_colour;    // printed part colour 1, RepRap logo colour
-pp2_colour      = is_undef($pp2_colour)      ? crimson : $pp2_colour;     // printed part colour 2
-pp3_colour      = is_undef($pp3_colour)      ? "SteelBlue" : $pp3_colour; // printed part colour 3
-pp4_colour      = is_undef($pp4_colour)      ? "darkorange" : $pp4_colour;// printed part colour 4
 show_rays       = is_undef($show_rays)       ? false  : $show_rays;       // show camera sight lines and light direction
 show_threads    = is_undef($show_threads)    ? false  : $show_threads;    // show screw threads
+show_plugs      = is_undef($show_plugs)      ? false  : $show_plugs;      // plugs on headers
+teardrop_angle  = is_undef($teardrop_angle)  ? 45     : $teardrop_angle;  // teardrop angle
+pp1_colour      = is_undef($pp1_colour)      ? rr_green     : $pp1_colour;// printed part colour 1, RepRap logo colour
+pp2_colour      = is_undef($pp2_colour)      ? crimson      : $pp2_colour;// printed part colour 2
+pp3_colour      = is_undef($pp3_colour)      ? "SteelBlue"  : $pp3_colour;// printed part colour 3
+pp4_colour      = is_undef($pp4_colour)      ? "darkorange" : $pp4_colour;// printed part colour 4
+
 
 // Minimum wall is about two filaments wide but we extrude it closer to get better bonding
 squeezed_wall = $preview ? 2 * extrusion_width - layer_height * (1 - PI / 4)
@@ -51,13 +51,14 @@ eps = 1/128;     // small fudge factor to stop CSG barfing on coincident faces.
 $fa = 6;
 $fs = extrusion_width / 2;
 
-function round_to_layer(z) = ceil(z / layer_height) * layer_height;
+function round_to_layer(z) = ceil(z / layer_height) * layer_height;         //! Round up to a multiple of layer_height.
+
 // Some additional named colours
-function grey(n) = [0.01, 0.01, 0.01] * n;                                          //! Generate a shade of grey to pass to color().
-silver                          = [0.75, 0.75, 0.75];
-gold                            = [255, 215,   0] / 255;
-brass                           = [255, 220, 100] / 255;
-copper                          = [230, 140,  51] / 255;
+function grey(n) = [0.01, 0.01, 0.01] * n;                                  //! Generate a shade of grey to pass to color().
+silver           = [0.75, 0.75, 0.75];
+gold             = [255, 215,   0] / 255;
+brass            = [255, 220, 100] / 255;
+copper           = [230, 140,  51] / 255;
 
 /*
  * Enums
@@ -73,11 +74,6 @@ hs_grub   = 4;     // pulley set screw
 hs_cs_cap = 5;
 hs_dome   = 6;
 //
-// Hot end descriptions
-//
-jhead   = 1;
-e3d     = 2;
-//
 // Face enumeration
 //
 f_bottom = 0;

lib.scad

@@ -55,6 +55,7 @@ include <vitamins/pulleys.scad>
 include <vitamins/ring_terminals.scad>
 include <vitamins/rails.scad>
 include <vitamins/rod.scad>
+include <vitamins/servo_motors.scad>
 include <vitamins/shaft_couplings.scad>
 include <vitamins/sheets.scad>
 include <vitamins/sk_brackets.scad>

libtest.scad

@@ -41,6 +41,7 @@
 //
 include <lib.scad>
 
+use <tests/7_segments.scad>
 use <tests/ball_bearings.scad>
 use <tests/batteries.scad>
 use <tests/bearing_blocks.scad>
@@ -83,6 +84,7 @@ use <tests/panel_meters.scad>
 use <tests/PCBs.scad>
 use <tests/pillars.scad>
 use <tests/pillow_blocks.scad>
+use <tests/potentiometers.scad>
 use <tests/press_fit.scad>
 use <tests/PSUs.scad>
 use <tests/pulleys.scad>
@@ -92,6 +94,7 @@ use <tests/rockers.scad>
 use <tests/rod.scad>
 use <tests/screws.scad>
 use <tests/sealing_strip.scad>
+use <tests/servo_motors.scad>
 use <tests/shaft_couplings.scad>
 use <tests/sheets.scad>
 use <tests/SK_brackets.scad>
@@ -120,6 +123,7 @@ use <tests/fixing_block.scad>
 use <tests/flat_hinge.scad>
 use <tests/foot.scad>
 use <tests/handle.scad>
+use <tests/knob.scad>
 use <tests/PCB_mount.scad>
 use <tests/pocket_handle.scad>
 use <tests/printed_box.scad>
@@ -156,10 +160,10 @@ translate([x5, cable_grommets_y + 60])
 translate([x5, cable_grommets_y + 90])
     corner_blocks();
 
-translate([x5, cable_grommets_y + 150])
+translate([x5, cable_grommets_y + 160])
     feet();
 
-translate([x5 + 70, cable_grommets_y + 150])
+translate([x5 + 70, cable_grommets_y + 160])
     screw_knobs();
 
 translate([x5, cable_grommets_y + 470]) {
@@ -170,30 +174,33 @@ translate([x5, cable_grommets_y + 470]) {
         flat_hinges();
 }
 
-translate([x5, cable_grommets_y + 370])
+translate([x5, cable_grommets_y + 380])
     no_explode() socket_boxes();
 
-translate([x5 + 60, cable_grommets_y + 200])
-    strap_handles();
-
 translate([640, cable_grommets_y + 200])
     printed_pulley_test();
 
-translate([x5, cable_grommets_y + 250])
+translate([x5, cable_grommets_y + 200])
+    knobs();
+
+translate([x5 + 60, cable_grommets_y + 250])
+    strap_handles();
+
+translate([x5, cable_grommets_y + 300])
     handle();
 
 translate([950, 600])
     box_test();
 
-translate([830, 770])
+translate([900, 750])
     pocket_handles();
 
-translate([950, 750])
+translate([900, 850])
     printed_boxes();
 
-translate([850, 1330])
-    bbox_test();
-
+translate([950, 1400])
+    rotate(-90)
+        bbox_test();
 
 inserts_y = 0;
 nuts_y = inserts_y + 20;
@@ -206,13 +213,14 @@ sealing_strip_y = springs_y + 20;
 tubings_y = sealing_strip_y + 20;
 pillars_y = tubings_y + 20;
 ball_bearings_y = pillars_y + 40;
-pulleys_y = ball_bearings_y +40;
-hot_ends_y = pulleys_y + 60;
-linear_bearings_y = hot_ends_y + 50;
-sheets_y = linear_bearings_y + 90;
+pulleys_y = ball_bearings_y + 40;
+leadnuts_y = pulleys_y + 60;
+linear_bearings_y = leadnuts_y + 50;
+steppers_y = linear_bearings_y + 110;
+sheets_y = steppers_y + 55;
 pcbs_y = sheets_y + 60;
-displays_y = pcbs_y + 170;
-fans_y = displays_y + 80;
+displays_y = pcbs_y + 140;
+fans_y = displays_y + 110;
 transformers_y = fans_y + 120;
 psus_y = transformers_y + 190;
 
@@ -255,13 +263,16 @@ translate([x0, ball_bearings_y])
 translate([x0, pulleys_y])
     pulleys();
 
+translate([x0, leadnuts_y])
+    leadnuts();
+
 translate([x0, linear_bearings_y]) {
     linear_bearings();
     rods();
 }
 
-translate([x0 + 10, hot_ends_y])
-    hot_ends();
+translate([x0, steppers_y])
+    stepper_motors();
 
 translate([x0, sheets_y])
     sheets();
@@ -279,7 +290,7 @@ translate([x0, fans_y]) {
         fan_guards();
 }
 
-translate([x0, transformers_y])
+translate([760, fans_y])
     variacs();
 
 translate([x0, psus_y]) {
@@ -291,7 +302,6 @@ translate([x0, psus_y]) {
 zipties_y = 0;
 bulldogs_y = zipties_y + 30;
 swiss_clips_y = bulldogs_y + 35;
-leadnuts_y = swiss_clips_y + 50;
 
 translate([x1, zipties_y])
     zipties();
@@ -302,10 +312,6 @@ translate([x1, bulldogs_y])
 translate([x1, swiss_clips_y])
     swiss_clips();
 
-translate([x1, leadnuts_y])
-    leadnuts();
-
-
 leds_y = 0;
 carriers_y = leds_y + 40;
 magnets_y = carriers_y + 40;
@@ -362,9 +368,9 @@ iecs_y = d_connectors_y + 80;
 modules_y = iecs_y + 60;
 ssrs_y = modules_y + 80;
 blowers_y = ssrs_y + 60;
-batteries_y = blowers_y + 100;
-steppers_y = batteries_y + 55;
-panel_meters_y = steppers_y + 70;
+hot_ends_y = blowers_y + 100;
+batteries_y = hot_ends_y + 55;
+panel_meters_y = batteries_y + 70;
 extrusions_y = panel_meters_y + 80;
 
 translate([x3, veroboard_y])
@@ -409,8 +415,8 @@ translate([x3, blowers_y])
 translate([x3, batteries_y])
     batteries();
 
-translate([x2, steppers_y])  // interloper
-    stepper_motors();
+translate([x3 + 10, hot_ends_y])
+    hot_ends();
 
 translate([x2, panel_meters_y])
     panel_meters();
@@ -418,7 +424,7 @@ translate([x2, panel_meters_y])
 translate([x2, extrusions_y])
     extrusions();
 
-translate([x3, transformers_y])
+translate([400, transformers_y])
     transformers();
 
 
@@ -426,18 +432,21 @@ belts_y = 0;
 rails_y = belts_y + 200;
 extrusion_brackets_y = rails_y + 250;
 sk_brackets_y = extrusion_brackets_y + 80;
-kp_pillow_blocks_y = sk_brackets_y + 50;
+kp_pillow_blocks_y = sk_brackets_y + 60;
 scs_bearing_blocks_y = kp_pillow_blocks_y + 60;
-cable_strip_y = fans_y + 50;
-box_sections_y = cable_strip_y;
-BLDC_y = sheets_y;
+box_sections_y = batteries_y;
+BLDC_y = scs_bearing_blocks_y + 120;
+pot_y = BLDC_y + 40;
+cable_strip_y = pot_y + 50;
+
+translate([0, transformers_y])
+    servo_motors();
 
 translate([x4 + 200, belts_y + 58]) {
     belt_test();
 
     translate([0, 60])
         opengrab_test();
-
 }
 
 translate([x4 + 175, belts_y, -20])
@@ -446,7 +455,7 @@ translate([x4 + 175, belts_y, -20])
 translate([x4, rails_y + 130])
     rails();
 
-translate([770, cable_strip_y])
+translate([x4, cable_strip_y])
     cable_strips();
 
 translate([x4, kp_pillow_blocks_y])
@@ -458,7 +467,7 @@ translate([x4, sk_brackets_y])
 translate([x4, extrusion_brackets_y])
     extrusion_brackets();
 
-translate([x4 + 120, extrusion_brackets_y])
+translate([x1, swiss_clips_y + 50])
     shaft_couplings();
 
 translate([x4, scs_bearing_blocks_y])
@@ -467,7 +476,10 @@ translate([x4, scs_bearing_blocks_y])
 translate([x4, BLDC_y])
     bldc_motors();
 
-translate([x6, box_sections_y])
+translate([x4, pot_y])
+    potentiometers();
+
+translate([x2, box_sections_y])
     box_sections();
 
 translate([x6, 125])

printed/box.scad

@@ -30,10 +30,16 @@
 //! ![](docs/box.png)
 //!
 //! Normally the side sheets are the same type but they can be overridden individually as long as the substitute has the same thickness.
+//!
+//! A box can have an optional name to allow more than one in the same project.
+//!
+//! The top bezel can have an optional child, which is subtracted to allow modification.
 //
-include <../core.scad>
+include <../utils/core/core.scad>
 use <../vitamins/sheet.scad>
 use <../vitamins/insert.scad>
+use <../vitamins/screw.scad>
+use <../vitamins/washer.scad>
 use <../utils/quadrant.scad>
 use <../utils/round.scad>
 
@@ -48,12 +54,13 @@ function box_sheets(type)      = type[3]; //! Sheet type used for the sides
 function box_top_sheet(type)   = type[4]; //! Sheet type for the top
 function box_base_sheet(type)  = type[5]; //! Sheet type for the bottom
 function box_feet(type)        = type[6]; //! True to enable feet on the bottom bezel
-function box_width(type)       = type[7]; //! Internal width
-function box_depth(type)       = type[8]; //! Internal depth
-function box_height(type)      = type[9]; //! Internal height
+function box_name(type)        = type[7]; //! Name for projects with more than one box
+function box_width(type)       = type[8]; //! Internal width
+function box_depth(type)       = type[9]; //! Internal depth
+function box_height(type)      = type[10];//! Internal height
 
-function box(screw, wall, sheets, top_sheet, base_sheet, size, feet = false, shelf_screw = M3_dome_screw) = //! Construct a property list for a box.
- concat([screw, shelf_screw, wall, sheets, top_sheet, base_sheet, feet], size);
+function box(screw, wall, sheets, top_sheet, base_sheet, size, feet = false, shelf_screw = undef, name = "box") = //! Construct a property list for a box.
+ concat([screw, is_undef(shelf_screw) ? screw : shelf_screw, wall, sheets, top_sheet, base_sheet, feet, name], size);
 
 function box_bezel_clearance(type) = bezel_clearance;
 
@@ -64,7 +71,7 @@ function box_washer(type) = screw_washer(box_screw(type));
 function box_insert(type) = screw_insert(box_screw(type));
 function box_shelf_insert(type) = screw_insert(box_shelf_screw(type));
 
-function box_hole_inset(type) = washer_radius(box_washer(type)) + 1;
+function box_hole_inset(type) = washer_radius(box_washer(type)) + 1; //! Screw inset from the corner of the internal dimensions
 function box_insert_r(type) = insert_hole_radius(box_insert(type));
 function box_insert_l(type) = insert_length(box_insert(type));
 function box_boss_r(type) = ceil(corrected_radius(box_insert_r(type)) + box_wall(type));
@@ -79,7 +86,6 @@ function box_screw_length(type, top) =
     let(s = top ? box_top_sheet(type) : box_base_sheet(type))
         screw_length(box_screw(type), sheet_thickness(s) + box_corner_gap(type) + box_profile_overlap(type) - 1, washers = 2, insert = true, longer = true);
 
-function box_wall_clearance(type) = box_sheet_slot(type) / 2 - sheet_thickness(box_sheets(type)) / 2;
 function box_margin(type) = box_profile_overlap(type) + box_corner_gap(type); //! How much the bezel intrudes on the specified height
 function box_intrusion(type) = box_hole_inset(type) + box_boss_r(type); //! Corner profile intrusion
 function sheet_reduction(type) = 2 * box_corner_gap(type) + sheet_end_clearance;
@@ -89,6 +95,8 @@ function box_bezel_height(type, bottom) = //! Bezel height for top or bottom
     let(t1 = sheet_thickness(box_base_sheet(type)), t2 = sheet_thickness(box_top_sheet(type)))
         box_corner_rad(type) + box_profile_overlap(type) + (bottom ? max(t1, t2) : t2) - sheet_thickness(box_sheets(type));
 
+function box_bc_name(type, suffix) = let(name = box_name(type)) name == "box" ? suffix : str(name, "_", suffix); // Backwards compatible name
+
 grill_hole = 5;
 grill_gap = 1.9;
 
@@ -141,7 +149,7 @@ module box_corner_profile_2D(type) { //! The 2D shape of the corner profile.
 module box_corner_profile(type) { //! Generates the corner profile STL for 3D printing.
     length = box_height(type) - 2 * box_margin(type);
 
-    stl("box_corner_profile")
+    stl(str(box_name(type), "_corner_profile"))
         difference() {
             linear_extrude(length, center = true, convexity = 5)
                 box_corner_profile_2D(type);
@@ -190,7 +198,7 @@ module box_corner_profile_section(type, section, sections) { //! Generates inter
 }
 
 module box_corner_profile_sections(type, section, sections) { //! Generate four copies of a corner profile section
-    stl("box_corner_profile");
+    stl(str(box_name(type), "_corner_profile"));
     offset = box_boss_r(type) + 1;
     for(i = [0 : 3])
         rotate(i * 90)
@@ -220,7 +228,7 @@ module box_bezel(type, bottom) { //! Generates top and bottom bezel STLs
     height = box_bezel_height(type, bottom);
     foot_extension = foot_height - height;
 
-    stl(bottom ? "bottom_bezel" : "top_bezel")
+    stl(box_bc_name(type, bottom ? "bottom_bezel" : "top_bezel"))
         difference() {
             w = box_width(type);
             d = box_depth(type);
@@ -280,6 +288,12 @@ module box_bezel(type, bottom) { //! Generates top and bottom bezel STLs
                         box_screw_hole_positions(type)
                             poly_circle(screw_clearance_radius(box_screw(type)));
                     }
+            //
+            // Optional child to subtract
+            //
+            if($children && !bottom)
+                translate_z(-box_profile_overlap(type))
+                    children();
          }
 }
 
@@ -353,7 +367,6 @@ module box_bezel_section(type, bottom, rows, cols, x, y) { //! Generates interlo
 
                 translate([0, bw2 / 2, dh2 / 2])
                     cube([eps, bw2 - 2 * dowel_wall + 2 * extrusion_width, dh2], center = true);
-
             }
         }
     }
@@ -369,7 +382,9 @@ module box_bezel_section(type, bottom, rows, cols, x, y) { //! Generates interlo
             union() {
                 clip(xmin = 0, xmax = w, ymin = 0, ymax = h)
                     translate([tw / 2 - x * w, th / 2 - y * h, profile_overlap])
-                        box_bezel(type, bottom);
+                        box_bezel(type, bottom)
+                            if($children && !bottom)
+                                children();
 
                 if(x < cols - 1 && y == 0)
                     translate([w, 0])
@@ -438,7 +453,7 @@ module box_screw_hole_positions(type) {
 }
 
 module box_base_blank(type) { //! Generates a 2D template for the base sheet
-    dxf("box_base");
+    dxf(str(box_name(type), "_base"));
 
     difference() {
         sheet_2D(box_base_sheet(type), box_width(type), box_depth(type), box_sheet_r(type));
@@ -449,7 +464,7 @@ module box_base_blank(type) { //! Generates a 2D template for the base sheet
 }
 
 module box_top_blank(type) {  //! Generates a 2D template for the top sheet
-    dxf("box_top");
+    dxf(str(box_name(type), "_top"));
 
     difference() {
         sheet_2D(box_top_sheet(type), box_width(type), box_depth(type), box_sheet_r(type));
@@ -464,7 +479,7 @@ function subst_sheet(type, sheet) =
         sheet ? assert(sheet_thickness(sheet) == sheet_thickness(s)) sheet : s;
 
 module box_shelf_blank(type, sheet = false) { //! Generates a 2D template for a shelf sheet
-    dxf("box_shelf");
+    dxf(str(box_name(type), "_shelf"));
 
     difference() {
         sheet_2D(subst_sheet(type, sheet), box_width(type) - bezel_clearance, box_depth(type) - bezel_clearance, 1);
@@ -512,7 +527,7 @@ module box_shelf_bracket(type, screw_positions, wall = undef) { //! Generates a
                         square([lip, eps]);
                 }
 
-    stl("shelf_bracket")
+    stl(box_bc_name(type, "shelf_bracket"))
         difference() {
             union() {
                 linear_extrude(w)
@@ -565,32 +580,49 @@ module box_shelf_bracket_section(type, rows, cols, x, y) { //! Generates section
 }
 
 module box_left_blank(type, sheet = false) { //! Generates a 2D template for the left sheet, `sheet` can be set to override the type
-    dxf("box_left");
+    dxf(str(box_name(type), "_left"));
 
     sheet_2D(subst_sheet(type, sheet), box_depth(type) - sheet_reduction(type), box_height(type) - sheet_reduction(type), 1);
 }
 
 module box_right_blank(type, sheet = false) { //! Generates a 2D template for the right sheet, `sheet` can be set to override the type
-    dxf("box_right");
+    dxf(str(box_name(type), "_right"));
 
     sheet_2D(subst_sheet(type, sheet), box_depth(type) - sheet_reduction(type), box_height(type) - sheet_reduction(type), 1);
 }
 
 module box_front_blank(type, sheet = false) { //! Generates a 2D template for the front sheet, `sheet` can be set to override the type
-    dxf("box_front");
+    dxf(str(box_name(type), "_front"));
 
     sheet_2D(subst_sheet(type, sheet), box_width(type) - sheet_reduction(type), box_height(type) - sheet_reduction(type), 1);
 }
 
 module box_back_blank(type, sheet = false) { //! Generates a 2D template for the back sheet, `sheet` can be set to override the type
-    dxf("box_back");
+    dxf(str(box_name(type), "_back"));
 
     sheet_2D(subst_sheet(type, sheet), box_width(type) - sheet_reduction(type), box_height(type) - sheet_reduction(type), 1);
 }
 
-module box_base(type)  render_2D_sheet(box_base_sheet(type)) box_base_blank(type);  //! Default base, can be overridden to customise
-module box_top(type)   render_2D_sheet(box_top_sheet(type))  box_top_blank(type);   //! Default top, can be overridden to customise
-module box_back(type)  render_2D_sheet(box_sheets(type))     box_back_blank(type);  //! Default back, can be overridden to customise
-module box_front(type) render_2D_sheet(box_sheets(type))     box_front_blank(type); //! Default front, can be overridden to customise
-module box_left(type)  render_2D_sheet(box_sheets(type))     box_left_blank(type);  //! Default left side, can be overridden to customise
-module box_right(type) render_2D_sheet(box_sheets(type))     box_right_blank(type); //! Default right side, can be overridden to customise
+module box_base(type)   //! Default base, can be overridden to customise
+    render_2D_sheet(box_base_sheet(type))
+        box_base_blank(type);
+
+module box_top(type)    //! Default top, can be overridden to customise
+    render_2D_sheet(box_top_sheet(type))
+        box_top_blank(type);
+
+module box_back(type)   //! Default back, can be overridden to customise
+    render_2D_sheet(box_sheets(type))
+        box_back_blank(type);
+
+module box_front(type)  //! Default front, can be overridden to customise
+    render_2D_sheet(box_sheets(type))
+        box_front_blank(type);
+
+module box_left(type)   //! Default left side, can be overridden to customise
+    render_2D_sheet(box_sheets(type))
+        box_left_blank(type);
+
+module box_right(type) //! Default right side, can be overridden to customise
+    render_2D_sheet(box_sheets(type))
+        box_right_blank(type);

printed/box_assembly.scad

@@ -23,12 +23,12 @@
 // parameters to make the assembly views. E.g. module box_assembly() _box_assembly(box);
 //
 module _box_assembly(type, top = true, base = true, left = true, right = true, back = true, front = true, bezels = true, corners = 4)
-assembly("box") {
+assembly(box_name(type)) {
     echo("Box:", box_width(type), box_depth(type), box_height(type));
 
     t = sheet_thickness(box_sheets(type));
 
-    for(corner = [0 :  corners - 1]) {
+    for(corner = [0 : 1 : corners - 1]) {
         x = [-1,1,1,-1][corner];
         y = [-1,-1,1,1][corner];
         translate([x * (box_width(type) / 2 + 25 * exploded()), y * (box_depth(type) / 2 + 25 * exploded())])
@@ -50,7 +50,9 @@ assembly("box") {
         translate_z(z * (box_height(type) / 2 - box_corner_gap(type) + 50 * exploded()))
             rotate([z * 90 - 90, 0, 0])
                 if(bezels && (z > 0 ? top : base))
-                    stl_colour(pp1_colour) render() box_bezel(type, z < 0);
+                    stl_colour(pp1_colour) render() box_bezel(type, z < 0)
+                        if(z > 0 && $children)
+                            children();
 
         translate_z(z * (box_height(type) / 2 + sheet_thickness + 50 * exploded()))
             box_screw_hole_positions(type)

printed/butt_box.scad

@@ -31,7 +31,8 @@
 //!  * An optional list of fixing blocks to be omitted can be given.
 //!  * Star washers can be omitted by setting the 11th parameter to false.
 //!
-//! Uses [fixing blocks](#fixing_block) and [corner blocks](#corner_block).
+//! Uses [fixing blocks](#fixing_block) and [corner blocks](#corner_block) by default. Setting `thin_blocks` uses 2screw_blocks instead of
+//! fixing_blocks along the sides.
 //
 
 use <fixing_block.scad>
@@ -46,15 +47,16 @@ function bbox_span(type)       = type[4]; //! Maximum span between fixing blocks
 function bbox_width(type)      = type[5]; //! Internal width
 function bbox_depth(type)      = type[6]; //! Internal depth
 function bbox_height(type)     = type[7]; //! Internal height
-function bbox_name(type)       = type[8] ? type[8] : "bbox"; //! Optional name if there is more than one box in a project
-function bbox_skip_blocks(type)= type[9] ? type[9] : [];  //! List of fixing blocks to skip, used to allow a hinged panel for example
-function star_washers(type)    = type[10] ? type[10] : is_undef(type[10]); //! Set to false to remove star washers.
+function bbox_name(type)       = type[8]; //! Optional name if there is more than one box in a project
+function bbox_skip_blocks(type)= type[9]; //! List of fixing blocks to skip, used to allow a hinged panel for example
+function bbox_star_washers(type)= type[10];//! Set to false to remove star washers.
+function bbox_thin_blocks(type) = type[11];//! Set for 2 screw blocks instead of three hole fixing blocks.
 
-function bbox(screw, sheets, base_sheet, top_sheet, span, size, name = "bbox", skip_blocks = [], star_washers = true) = //! Construct the property list for a butt_box
- [ screw, sheets, base_sheet, top_sheet, span, size.x, size.y, size.z, name, skip_blocks, star_washers ];
+function bbox(screw, sheets, base_sheet, top_sheet, span, size, name = "bbox", skip_blocks = [], star_washers = true, thin_blocks = false) = //! Construct the property list for a butt_box
+ [ screw, sheets, base_sheet, top_sheet, span, size.x, size.y, size.z, name, skip_blocks, star_washers, thin_blocks ];
 
 function bbox_volume(type) = bbox_width(type) * bbox_depth(type) * bbox_height(type) / 1000000; //! Internal volume in litres
-function bbox_area(type) = let(w =  bbox_width(type), d = bbox_depth(type), h = bbox_height(type)) //! Internal surdface area in m^2
+function bbox_area(type) = let(w =  bbox_width(type), d = bbox_depth(type), h = bbox_height(type)) //! Internal surface area in m^2
     2 * (w * d + w * h + d * h) / 1000000;
 
 module bbox_shelf_blank(type) { //! 2D template for a shelf
@@ -108,7 +110,10 @@ function fixing_block_positions(type) = let(
                 rotate([y > 0 ? 180 : 0, x * y * 90, 0]),
     ];
 
-function side_holes(type) = [for(p = fixing_block_positions(type), q = fixing_block_holes(bbox_screw(type))) p * q];
+function side_holes(type) = let(
+    screw = bbox_screw(type),
+    holes = bbox_thin_blocks(type) ? 2screw_block_holes(screw) : fixing_block_holes(screw))
+        [for(p = fixing_block_positions(type), q = holes) p * q];
 
 module bbox_drill_holes(type, t)
     position_children(concat(corner_holes(type), side_holes(type)), t)
@@ -198,22 +203,41 @@ module bbox_back_blank(type, sheet = false) { //! 2D template for the back
     }
 }
 
-module bbox_base(type)  render_2D_sheet(bbox_base_sheet(type)) bbox_base_blank(type);   //! Default base, can be overridden to customise
-module bbox_top(type)   render_2D_sheet(bbox_top_sheet(type)) bbox_top_blank(type);     //! Default top, can be overridden to customise
-module bbox_back(type)  render_2D_sheet(bbox_sheets(type)) bbox_back_blank(type);       //! Default back, can be overridden to customise
-module bbox_front(type) render_2D_sheet(bbox_sheets(type)) bbox_front_blank(type);      //! Default front, can be overridden to customise
-module bbox_left(type)  render_2D_sheet(bbox_sheets(type)) bbox_left_blank(type);       //! Default left side, can be overridden to customise
-module bbox_right(type) render_2D_sheet(bbox_sheets(type)) bbox_right_blank(type);      //! Default right side, can be overridden to customise
+module bbox_base(type)  //! Default base, can be overridden to customise
+    render_2D_sheet(bbox_base_sheet(type))
+        bbox_base_blank(type);
+
+module bbox_top(type)   //! Default top, can be overridden to customise
+    render_2D_sheet(bbox_top_sheet(type))
+        bbox_top_blank(type);
+
+module bbox_back(type)  //! Default back, can be overridden to customise
+    render_2D_sheet(bbox_sheets(type))
+        bbox_back_blank(type);
+
+module bbox_front(type) //! Default front, can be overridden to customise
+    render_2D_sheet(bbox_sheets(type))
+        bbox_front_blank(type);
+
+module bbox_left(type)  //! Default left side, can be overridden to customise
+    render_2D_sheet(bbox_sheets(type))
+        bbox_left_blank(type);
+
+module bbox_right(type) //! Default right side, can be overridden to customise
+    render_2D_sheet(bbox_sheets(type))
+        bbox_right_blank(type);
 
 module _bbox_assembly(type, top = true, base = true, left = true, right = true, back = true, front = true) { //! The box assembly, wrap with a local copy without parameters
     width = bbox_width(type);
     depth = bbox_depth(type);
     height = bbox_height(type);
-    echo("Box:", width, depth, height, volume = bbox_volume(type), area = bbox_area(type));
+    echo("Butt_box:", width, depth, height, volume = bbox_volume(type), area = bbox_area(type));
 
     t = sheet_thickness(bbox_sheets(type));
     bt = sheet_thickness(bbox_base_sheet(type));
     tt = sheet_thickness(bbox_top_sheet(type));
+    star_washers = bbox_star_washers(type);
+    thin_blocks = bbox_thin_blocks(type);
 
     function is_missing_screw(p) = p.y > depth / 2 - 1 ? !back : false;
 
@@ -223,13 +247,16 @@ module _bbox_assembly(type, top = true, base = true, left = true, right = true,
             let(q = transform([0, 0, 0], p), thickness = q.z > 0 ? tt : bt)
                 multmatrix(p)
                     fastened_corner_block_assembly(is_missing_screw(q) && ((q.z > 0) != (q.x > 0)) ? 0 : t, bbox_screw(type), thickness,
-                                                   is_missing_screw(q) && ((q.z > 0) == (q.x > 0)) ? 0 : t, star_washers = star_washers(type));
+                                                   is_missing_screw(q) && ((q.z > 0) == (q.x > 0)) ? 0 : t, star_washers = star_washers);
 
         h = height / 2 - 1;
         for(p = fixing_block_positions(type))
             let(q = transform([0, 0, 0], p), thickness = q.z > h ? tt : q.z < -h ? bt : t)
                 multmatrix(p)
-                    fastened_fixing_block_assembly(is_missing_screw(q) ? 0 : t, bbox_screw(type), thickness2 = thickness, star_washers = star_washers(type));
+                    if(thin_blocks)
+                        fastened_2screw_block_assembly(is_missing_screw(q) ? 0 : t, bbox_screw(type), thickness_below = thickness, star_washers = star_washers);
+                    else
+                        fastened_fixing_block_assembly(is_missing_screw(q) ? 0 : t, bbox_screw(type), thickness2 = thickness, star_washers = star_washers);
 
         for(x = [-1, 1])
             translate([x * (width / 2 + t / 2 + eps + 25 * exploded()), 0])

printed/cable_grommets.scad

@@ -158,14 +158,14 @@ module mouse_grommet_hole(r, h = 50, z = undef, expand = wall + clearance) //! M
                 square([2 * R, eps]);
         }
 
-function mouse_grommet_offset(r) = r + wall;
+function mouse_grommet_offset(r) = r + wall; //! Offset of the wire from the ground
+function mouse_grommet_length(r) = 2 * r + 2 * wall + 2 * overlap; //! Length of grommet given r
 
 module mouse_grommet(r, thickness) { //! Make the STL for a mouse grommet
 
     width = 2 * (wall + clearance) + thickness;
-    length = 2 * r + 2 * wall + 2 * overlap;
 
-    stl(str("mouse_grommet_", r * 10, "_", thickness))
+    stl(str("mouse_grommet_", r * 20, "_", thickness))
         rotate([90, 0, 0])
             union() {
                 for(side = [-1, 1])
@@ -193,10 +193,10 @@ module mouse_grommet_assembly(r, thickness)
             mouse_grommet(r, thickness);
 
 module ribbon_grommet_20_3_stl() ribbon_grommet(20, 3);
-module mouse_grommet_15_3_stl() mouse_grommet(1.5, 3);
-module mouse_grommet_20_3_stl() mouse_grommet(2, 3);
-module mouse_grommet_25_3_stl() mouse_grommet(2.5, 3);
-module mouse_grommet_30_3_stl() mouse_grommet(3, 3);
+module mouse_grommet_30_3_stl() mouse_grommet(1.5, 3);
+module mouse_grommet_40_3_stl() mouse_grommet(2, 3);
+module mouse_grommet_50_3_stl() mouse_grommet(2.5, 3);
+module mouse_grommet_60_3_stl() mouse_grommet(3, 3);
 
 module round_grommet_bottom_30_stl() round_grommet_bottom(3);
 module round_grommet_bottom_40_stl() round_grommet_bottom(4);

printed/corner_block.scad

@@ -29,6 +29,9 @@
 //! This allows the block and one set of fasteners to be on one assembly and the other fasteners on the mating assemblies.
 //!
 //! Star washers can be omitted by setting `star_washers` to false.
+//!
+//! A 2screw_block is a thinner version with two screws and two mating surfaces. It can be used as an alternative to fixing blocks when
+//! high lateral rigity is not required.
 //
 include <../core.scad>
 use <../vitamins/insert.scad>
@@ -45,6 +48,7 @@ function corner_block_hole_offset(screw = def_screw) = //! Hole offset from the
     let(insert = screw_insert(screw))
         insert_length(insert) + max(overshoot + screw_clearance_radius(screw), insert_hole_radius(insert)) + 1;
 
+
 function corner_block_width(screw = def_screw) = //! Block width, depth and height
     corner_block_hole_offset(screw) + insert_outer_d(screw_insert(screw)) / 2 + wall;
 
@@ -117,7 +121,7 @@ module corner_block(screw = def_screw, name = false) { //! Generate the STL for
 }
 
 module corner_block_assembly(screw = def_screw, name = false) //! The printed block with inserts
-assembly(str("corner_block_M", 20 * screw_radius(screw)), ngb = true) {
+assembly(name ? name : str("corner_block_M", 20 * screw_radius(screw)), ngb = true) {
     insert = screw_insert(screw);
 
     stl_colour(name ? pp2_colour : pp1_colour)
@@ -192,3 +196,127 @@ module corner_block_M30_assembly() corner_block_assembly(M3_cap_screw);
 //! 1. Lay the blocks on each of their other two flat sides and repeat.
 //
 module corner_block_M40_assembly() corner_block_assembly(M4_cap_screw);
+
+function 2screw_block_width(screw = def_screw) = //! 2 screw block width is narrower, height and depth are as corner_block
+    insert_outer_d(screw_insert(screw)) + 2 * wall;
+
+function 2screw_block_v_hole(screw = def_screw) = translate([0, corner_block_hole_offset(screw)]) * rotate([180, 0, 0]); //! Transform to bottom hole
+function 2screw_block_h_hole(screw = def_screw) = translate([0, 0, corner_block_hole_offset(screw)]) * rotate([90, 0, 0]); //! Transform to front hole
+function 2screw_block_holes(screw) = concat([2screw_block_v_hole(screw)], [2screw_block_h_hole(screw)]); //! List of transforms to both holes
+
+module 2screw_block_v_hole(screw = def_screw) //! Place children at the bottom screw hole
+    multmatrix(2screw_block_v_hole(screw))
+        children();
+
+module 2screw_block_h_hole(screw = def_screw) //! Place children at the front screw hole
+    multmatrix(2screw_block_h_hole(screw))
+        children();
+
+module 2screw_block_holes(screw = def_screw) //! Place children at both screw holes
+    for(p = 2screw_block_holes(screw))
+        multmatrix(p)
+            children();
+
+module 2screw_block(screw = def_screw, name = false) { //! Generate the STL for a printed 2screw block
+    r = 1;
+    cb_width = 2screw_block_width(screw);
+    cb_height = corner_block_width(screw);
+    cb_depth = cb_height;
+    insert = screw_insert(screw);
+    corner_rad = insert_outer_d(insert) / 2 + wall;
+    offset = corner_block_hole_offset(screw);
+
+    stl(name ? name : str("2screw_block", "_M", screw_radius(screw) * 20))
+        difference() {
+            hull()  {
+                translate([-cb_width / 2 + r, r])
+                    cylinder(r = r, h = 1);
+
+                translate([cb_width / 2 - r, r])
+                    cylinder(r = r, h = 1);
+
+                translate([0, offset, offset])
+                    sphere(corner_rad);
+
+                translate([0, offset])
+                    cylinder(r = corner_rad, h = 1);
+
+                translate([0, r, offset])
+                    rotate([-90, 0, 180])
+                        rounded_cylinder(r = corner_rad, h = r, r2 = r);
+            }
+            2screw_block_v_hole(screw)
+                insert_hole(insert, overshoot);
+
+            2screw_block_h_hole(screw)
+                insert_hole(insert, overshoot, true);
+
+            children();
+        }
+}
+
+module 2screw_block_assembly(screw = def_screw, name = false) //! The printed block with inserts
+assembly(name ? name : str("2screw_block_M", 20 * screw_radius(screw)), ngb = true) {
+    insert = screw_insert(screw);
+
+    stl_colour(name ? pp2_colour : pp1_colour)
+        render() 2screw_block(screw, name) children();
+
+    2screw_block_holes(screw)
+        insert(insert);
+}
+
+module fastened_2screw_block_assembly(thickness, screw = def_screw, thickness_below = undef, name = false, show_block = true, star_washers = true) { //! Printed block with fasteners
+    thickness2 = !is_undef(thickness_below) ? thickness_below : thickness;
+    function screw_len(t) = screw_length(screw, t + overshoot, star_washers ? 2 : 1, true);
+    screw_length = screw_len(thickness);
+    screw_length2 = screw_len(thickness2);
+
+    if(show_block)
+        2screw_block_assembly(screw, name) children();
+
+    if(thickness)
+        2screw_block_h_hole(screw)
+            translate_z(thickness)
+                screw_and_washer(screw, screw_length, star_washers);
+
+    if(thickness2)
+        2screw_block_v_hole(screw)
+            translate_z(thickness2)
+                screw_and_washer(screw, screw_length2, star_washers);
+}
+module 2screw_block_M20_stl() 2screw_block(M2_cap_screw);
+module 2screw_block_M25_stl() 2screw_block(M2p5_cap_screw);
+module 2screw_block_M30_stl() 2screw_block(M3_cap_screw);
+module 2screw_block_M40_stl() 2screw_block(M4_cap_screw);
+//
+//! 1. Lay the blocks out and place an M2 insert in the forward facing hole.
+//! 1. Push them home with a soldering iron with a conical bit heated to 200&deg;C.
+//! When removing the iron it helps to twist it a little anti-clockwise to release it from the thread.
+//! 1. Lay the blocks on each of their other flat side and repeat.
+//
+module 2screw_block_M20_assembly() 2screw_block_assembly(M2_cap_screw);
+
+//
+//! 1. Lay the blocks out and place an M2.5 insert in the forward facing hole.
+//! 1. Push them home with a soldering iron with a conical bit heated to 200&deg;C.
+//! When removing the iron it helps to twist it a little anti-clockwise to release it from the thread.
+//! 1. Lay the blocks on each of their other flat side and repeat.
+//
+module 2screw_block_M25_assembly() 2screw_block_assembly(M2p5_cap_screw);
+
+//
+//! 1. Lay the blocks out and place an M3 insert in the forward facing hole.
+//! 1. Push them home with a soldering iron with a conical bit heated to 200&deg;C.
+//! When removing the iron it helps to twist it a little anti-clockwise to release it from the thread.
+//! 1. Lay the blocks on each of their other flat side and repeat.
+//
+module 2screw_block_M30_assembly() 2screw_block_assembly(M3_cap_screw);
+
+//
+//! 1. Lay the blocks out and place an M4 insert in the forward facing hole.
+//! 1. Push them home with a soldering iron with a conical bit heated to 200&deg;C.
+//! When removing the iron it helps to twist it a little anti-clockwise to release it from the thread.
+//! 1. Lay the blocks on each of their other flat side and repeat.
+//
+module 2screw_block_M40_assembly() 2screw_block_assembly(M4_cap_screw);

printed/door_hinge.scad

@@ -45,7 +45,7 @@ function door_hinge_stat_screw() = stat_screw;              //! Screw use to fas
 function door_hinge_stat_width() = stat_width;              //! Width of the stationary part
 function door_hinge_stat_length() = stat_length;            //! Length of the stationary part
 
-module door_hinge_hole_positions(dir = 0) {                 //! Position chidren at the door hole positions
+module door_hinge_hole_positions(dir = 0) {                 //! Position children at the door hole positions
     hole_pitch = width - 10;
 
     for(side = [-1, 1])

printed/door_latch.scad

@@ -57,7 +57,7 @@ module door_latch_stl() { //! Generates the STL for the printed part
         }
 }
 
-module door_latch_assembly(sheet_thickness = 3) { //! The assembly for a specified sheet thickess
+module door_latch_assembly(sheet_thickness = 3) { //! The assembly for a specified sheet thickness
     washer = screw_washer(screw);
     nut = screw_nut(screw);
 

printed/drag_chain.scad

@@ -20,7 +20,7 @@
 //
 //! Parametric cable drag chain to limit the bend radius of a cable run.
 //!
-//! Each link has a maximum bend angle of 45°, so the mininium radius is proportional to the link length.
+//! Each link has a maximum bend angle of 45°, so the minimum radius is proportional to the link length.
 //!
 //! The travel property is how far it can move in each direction, i.e. half the maximum travel if the chain is mounted in the middle of the travel.
 //!
@@ -35,18 +35,17 @@ include <../core.scad>
 use <../utils/horiholes.scad>
 use <../utils/maths.scad>
 
-clearance = 0.1;
-
 function drag_chain_name(type)        = type[0]; //! The name to allow more than one in a project
 function drag_chain_size(type)        = type[1]; //! The internal size and link length
 function drag_chain_travel(type)      = type[2]; //! X travel
 function drag_chain_wall(type)        = type[3]; //! Side wall thickness
 function drag_chain_bwall(type)       = type[4]; //! Bottom wall
 function drag_chain_twall(type)       = type[5]; //! Top wall
-function drag_chain_screw(type)       = type[6]; //! Mounting screw for the ends
-function drag_chain_screw_lists(type) = type[7]; //! Two lists of four bools to say which screws positions are used
+function drag_chain_clearance(type)   = type[6]; //! Clearance around joints
+function drag_chain_supports(type)    = type[7]; //! Whether to print version of chain with or without supports
+function drag_chain_screw(type)       = type[8]; //! Mounting screw for the ends
+function drag_chain_screw_lists(type) = type[9]; //! Two lists of four bools to say which screws positions are used
 
-function drag_chain_clearance() = clearance; //! Clearance around joints.
 
 function drag_chain_radius(type) = //! The bend radius at the pivot centres
     let(s = drag_chain_size(type))
@@ -56,12 +55,15 @@ function drag_chain_z(type) = //! Outside dimension of a 180 bend
     let(os = drag_chain_outer_size(type), s = drag_chain_size(type))
         2 * drag_chain_radius(type) + os.z;
 
-function drag_chain(name, size, travel, wall = 1.6, bwall = 1.5, twall = 1.5, screw = M2_cap_screw, screw_lists = [[1,0,0,1],[1,0,0,1]]) = //! Constructor
-    [name, size, travel, wall, bwall, twall, screw, screw_lists];
+function drag_chain(name, size, travel, wall = 1.6, bwall = 1.5, twall = 1.5, clearance = 0.1, supports = true, screw = M2_cap_screw, screw_lists = [[1,0,0,1],[1,0,0,1]]) = //! Constructor
+    [name, size, travel, wall, bwall, twall, clearance, supports, screw, screw_lists];
 
 function drag_chain_outer_size(type) = //! Link outer dimensions
     let(s = drag_chain_size(type), z = s.z + drag_chain_bwall(type) + drag_chain_twall(type))
-        [s.x + z, s.y + 4 * drag_chain_wall(type) + 2 * clearance, z];
+        [s.x + z, s.y + 4 * drag_chain_wall(type) + 2 * drag_chain_clearance(type), z];
+
+function drag_chain_links(type) = //! Number of links in chain
+    ceil(drag_chain_travel(type) / drag_chain_size(type).x) + 4;
 
 function screw_lug_radius(screw) = //! Radius of a screw lug
     corrected_radius(screw_clearance_radius(screw)) + 3.1 * extrusion_width;
@@ -85,6 +87,7 @@ module drag_chain_screw_positions(type, end) { //! Place children at the screw p
     r = screw_lug_radius(drag_chain_screw(type));
     s = drag_chain_size(type);
     os = drag_chain_outer_size(type);
+    clearance = drag_chain_clearance(type);
     R = os.z / 2;
     x0 = end ? R + norm([drag_chain_cam_x(type), R - drag_chain_twall(type)]) + clearance + r : r;
     x1 = end ? os.x - r : os.x - 2 * R - clearance - r;
@@ -99,7 +102,7 @@ function drag_chain_cam_x(type) = // how far the cam sticks out
     let(s = drag_chain_size(type),
         r =  drag_chain_outer_size(type).z / 2,
         wall =  drag_chain_wall(type),
-        cam_r = s.x - 2 * clearance - wall - r,  // inner_x_normal - clearance - r
+        cam_r = s.x - 2 * drag_chain_clearance(type) - wall - r,  // inner_x_normal - clearance - r
         twall = drag_chain_twall(type)
     )   min(sqrt(max(sqr(cam_r) - sqr(r - twall), 0)), r);
 
@@ -111,8 +114,15 @@ module drag_chain_link(type, start = false, end = false, check_kids = true) { //
     bwall = drag_chain_bwall(type);
     twall = drag_chain_twall(type);
     os = drag_chain_outer_size(type);
+    clearance = drag_chain_clearance(type);
+    supports = drag_chain_supports(type);
     r = os.z / 2;
-    pin_r = r / 2;
+    // initial estimates of pin_r and pin_h
+    pin_r0 = r / 2 - 0.2;
+    pin_h0 = min(wall + clearance, 2 * pin_r0 - 1);
+     // for conical pin: ensure minimum radius of top of pin and pin does not overlap cutout
+    pin_r = supports ? r / 2 : min(r / 2 - 0.2, (os.z - 2 * twall - 3 * pin_h0 / 4 - 0.2) / 2);
+    pin_h = min(wall + clearance, 2 * pin_r - 1);
 
     socket_x = r;
     pin_x = socket_x + s.x;
@@ -123,44 +133,51 @@ module drag_chain_link(type, start = false, end = false, check_kids = true) { //
     inner_x = start ? 0 : outer_normal_x - wall; // s.x - clearance - wall
 
     roof_x_normal = 2 * r - twall;
-    roof_x = start ? 0 : roof_x_normal;
-
-    floor_x = start ? 0 : 2 * r;
     cam_x = drag_chain_cam_x(type);
     assert(r + norm([drag_chain_cam_x(type), r - drag_chain_twall(type)]) + clearance <= inner_x || start, "Link must be longer");
 
+    vflip(!supports)
     difference() {
         union() {
             for(side = [-1, 1])
                 rotate([90, 0, 0]) {
                     // Outer cheeks
                     translate_z(side * (os.y / 2 - wall / 2))
-                        linear_extrude(wall, center = true)
-                            difference() {
+                        difference() {
+                            linear_extrude(wall, center = true)
                                 hull() {
                                     if(start)
                                         square([eps, os.z]);
                                     else
                                         translate([socket_x, r])
-                                            rotate(180)
+                                            rotate(supports ? 180 : 0)
                                                 teardrop(r = r, h = 0);
 
                                     translate([outer_end_x - eps, 0])
                                         square([eps, os.z]);
                                 }
                                 if(!start)
-                                    translate([socket_x, r])
-                                        horihole(pin_r, r);
+                                    if(supports)
+                                        translate([socket_x, r, 0])
+                                            horihole(pin_r, r, wall + 2*eps);
+                                    else
+                                        translate([socket_x, r, -side * (wall / 2 + clearance)])
+                                            rotate(180)
+                                                hull() {
+                                                    horihole(r = pin_r + pin_h / 2, z = r, h = eps);
+                                                    translate_z(side * pin_h)
+                                                        horihole(r = pin_r - pin_h / 2, z = r, h = eps);
+                                                }
                             }
                     // Inner cheeks
-                    translate_z(side * (s.y / 2 + wall / 2))
+                    translate_z(side * (s.y / 2 + wall / 2)) {
                         linear_extrude(wall, center = true)
                             difference() {
                                 union() {
                                     hull() {
                                         if(!end) {
                                             translate([pin_x, r])
-                                                rotate(180)
+                                                rotate(supports ? 180 : 0)
                                                     teardrop(r = r, h = 0);
 
                                             translate([pin_x, twall])
@@ -186,31 +203,39 @@ module drag_chain_link(type, start = false, end = false, check_kids = true) { //
                                                     square(os.z);
                                     }
                             }
-                    // Pin
-                    if(!end)
-                        translate([pin_x, r, side * (s.y / 2 + wall + clearance)])
-                            horicylinder(r = pin_r, z = r, h = 2 * wall);
+                        // Pin
+                        if(!end)
+                            if(supports)
+                                translate([pin_x, r, side * (wall / 2 + clearance)])
+                                    horicylinder(r = pin_r, z = r, h = 2 * wall + eps);
+                            else
+                                translate([pin_x, r, side * wall / 2])
+                                    vflip(side == -1)
+                                        cylinder(r1 = pin_r + pin_h / 2, r2 = pin_r - pin_h / 2, h = pin_h + eps);
+                    }
 
                     // Cheek joint
                     translate([inner_x, 0, side * (s.y / 2 + wall) - 0.5])
                         cube([outer_end_x - inner_x, os.z, 1]);
                 }
 
-            // Roof, actually the floor when printed
+            // Roof, actually the floor when printed with supports
+            roof_x = start ? 0 : roof_x_normal;
             roof_end = end ? s.x + 2 * r : s.x + r - twall - clearance;
-            translate([roof_x, -s.y / 2 - 0.5])
-                cube([roof_end - roof_x , s.y + 1, twall]);
+            translate([roof_x, -s.y / 2 - wall, 0]) {
+                cube([roof_end - roof_x, s.y + 2 * wall, twall]);
+                translate([0, -wall, 0])
+                    cube([s.x - roof_x - clearance, s.y + 4 * wall, twall]);
+            }
 
-            translate([roof_x, -os.y / 2 + 0.5])
-                cube([s.x - clearance - roof_x, os.y - 1, twall]);
-
-            // Floor, actually the roof when printed
+            // Floor, actually the roof when printed with supports
+            floor_x = start ? 0 : 2 * r;
             floor_end = end ? s.x + 2 * r : s.x + r;
-            translate([floor_x, -s.y / 2 - wall, os.z - bwall])
+            translate([floor_x, -s.y / 2 - wall, os.z - bwall]) {
                 cube([floor_end - floor_x, s.y + 2 * wall, bwall]);
-
-            translate([floor_x, -os.y / 2 + 0.5,  os.z - bwall])
-                cube([s.x - floor_x - clearance, os.y -1, bwall]);
+                translate([0, -wall, 0])
+                    cube([s.x - floor_x - clearance, s.y + 4 * wall, bwall]);
+            }
 
             if(start || end) {
                 drag_chain_screw_positions(type, end)
@@ -223,16 +248,16 @@ module drag_chain_link(type, start = false, end = false, check_kids = true) { //
                 }
                 children();
             }
-        }
+        } // end union
+
         if(start || end)
             translate_z(-eps)
                 drag_chain_screw_positions(type, end)
                     rotate($a)
                         poly_cylinder(r = screw_clearance_radius(drag_chain_screw(type)), h = os.z + 2 * eps, center = false);
+    } // end difference
 
-    }
-
-    if(show_supports() && !end) {
+    if(supports && show_supports() && !end) {
         for(side = [-1, 1]) {
             w = 2.1 * extrusion_width;
             translate([s.x + r + cam_x - w / 2, side * (s.y / 2 + wall / 2), twall / 2])
@@ -255,16 +280,15 @@ module _drag_chain_assembly(type, pos = 0, render = false) {
     s = drag_chain_size(type);
     x = (1 + exploded()) * s.x;
     r = drag_chain_radius(type) * x / s.x;
-    travel = drag_chain_travel(type);
-    links = ceil(travel / s.x);
-    actual_travel = links * s.x;
+    links = drag_chain_links(type);
+    actual_travel = (links - 4) * s.x;
     z = drag_chain_outer_size(type).z;
 
     zb = z / 2;                                     // z of bottom track
     c = [actual_travel / 2 + pos / 2, 0, r + zb];   // centre of bend
 
     points = [                                      // Calculate list of hinge points
-        for(i = 0, p = [0, 0, z / 2 + 2 * r]; i < links + 5;
+        for(i = 0, p = [0, 0, z / 2 + 2 * r]; i < links + 1;
             i = i + 1,
             dx = p.z > c.z ? x : -x,
             p = max(p.x + dx, p.x) <= c.x ? p + [dx, 0, 0]      // Straight sections
@@ -277,11 +301,12 @@ module _drag_chain_assembly(type, pos = 0, render = false) {
 
     module link(n)                                  // Position and colour link with origin at the hinge hole
         translate([-z / 2, 0, -z / 2]) {
-            stl_colour(n < 0 || n == npoints - 1 ? pp3_colour : n % 2 ? pp1_colour : pp2_colour)
-                render_if(render)
-                    drag_chain_link(type, start = n == -1, end = n == npoints - 1, check_kids = false)
-                        let($fasteners = 0)
-                            children();
+            vflip(!drag_chain_supports(type))
+                stl_colour(n < 0 || n == npoints - 1 ? pp3_colour : n % 2 ? pp1_colour : pp2_colour)
+                    render_if(render)
+                        drag_chain_link(type, start = n == -1, end = n == npoints - 1, check_kids = false)
+                            let($fasteners = 0)
+                                children();
 
             let($fasteners = 1) children();
         }

printed/fan_guard.scad

@@ -17,7 +17,7 @@
 // If not, see <https://www.gnu.org/licenses/>.
 
 //
-//! Pintable fan finger guard to match the specified fan. To be `include`d, not `use`d.
+//! Printable fan finger guard to match the specified fan. To be `include`d, not `use`d.
 //!
 //! The ring spacing as well as the number of spokes can be specified, if zero a gasket is generated instead of a guard.
 //
@@ -29,7 +29,7 @@ function fan_guard_wall() = extrusion_width - layer_height / 2 + nozzle / 2 + ex
 function fan_guard_corner_r(type) = washer_diameter(screw_washer(fan_screw(type))) / 2 + 0.5; //! Corner radius of the guard
 function fan_guard_width(type) = max(2 * (fan_hole_pitch(type) + fan_guard_corner_r(type)), fan_bore(type) + 4 * fan_guard_wall()); //! Width of the guard
 
-module fan_guard(type, name = false, thickness = fan_guard_thickness(), spokes = 4, finger_width = 7, grill = false) { //! Generate the STL
+module fan_guard(type, name = false, thickness = fan_guard_thickness(), spokes = 4, finger_width = 7, grill = false, screws = true) { //! Generate the STL
     if(thickness)
         stl(name ? name : str("fan_guard_", fan_width(type)));
     hole_pitch = fan_hole_pitch(type);
@@ -54,7 +54,7 @@ module fan_guard(type, name = false, thickness = fan_guard_thickness(), spokes =
                 difference() {
                     rounded_square([width, width], r = width / 2 - hole_pitch);
 
-                    fan_holes(type, !grill, !grill, h = 0);
+                    fan_holes(type, !grill, !grill && screws, h = 0);
                 }
                 if(spokes) {
                     intersection() {

printed/fixing_block.scad

@@ -105,7 +105,8 @@ module fixing_block(screw = def_screw) { //! Generate the STL
         }
 }
 
-module fixing_block_assembly(screw = def_screw) pose([55, 180, 25], [0, 4.8, 4.8]) //! Printed part with the inserts inserted
+module fixing_block_assembly(screw = def_screw) //! Printed part with the inserts inserted
+pose([55, 180, 25], [0, 4.8, 4.8])
 assembly(str("fixing_block_M", 20 * screw_radius(screw)), ngb = true) {
     translate_z(fixing_block_height(screw))
         rotate([0, 180, 0])

printed/flat_hinge.scad

@@ -40,7 +40,7 @@ function hinge_knuckles(type)    = type[6]; //! How many knuckles
 function hinge_screw(type)       = type[7]; //! Screw type to mount it
 function hinge_screws(type)      = type[8]; //! How many screws
 function hinge_clearance(type)   = type[9]; //! Clearance between knuckles
-function hinge_margin(type)      = type[10]; //! How far to keep the screws from the knuckes
+function hinge_margin(type)      = type[10]; //! How far to keep the screws from the knuckles
 
 function flat_hinge(name, size, pin_d, knuckle_d, knuckles, screw, screws, clearance, margin) = //! Construct the property list for a flat hinge.
  [name, size.x, size.y, size.z, pin_d, knuckle_d, knuckles, screw, screws, clearance, margin];
@@ -73,7 +73,7 @@ module hinge_male(type, female = false) {       //! The half with the stationary
     assert(kr > pr, "knuckle diameter must be bigger than the pin diameter");
 
     n = hinge_knuckles(type);
-    assert(n >= 3, "must be at least three knuckes");
+    assert(n >= 3, "must be at least three knuckles");
     mn = ceil(n / 2);                           // Male knuckles
     fn = floor(n / 2);                          // Female knuckles
     gap = hinge_clearance(type);

printed/foot.scad

@@ -67,18 +67,19 @@ module foot(type = foot) { //! Generate STL
         }
 }
 
-module foot_assembly(t = 0, type = foot, flip = false) { //! Assembly with fasteners in place for specified sheet thickness
+module foot_assembly(t = 0, type = foot, flip = false, no_washer = false) { //! Assembly with fasteners in place for specified sheet thickness
     screw = foot_screw(type);
     nut = screw_nut(screw);
     squeeze = 0.5;
-    screw_length = screw_length(screw, foot_thickness(type) + t - squeeze, 2, nyloc = true);
+    screw_length = screw_length(screw, foot_thickness(type) + t - squeeze, no_washer ? 1 : 2, nyloc = true);
 
     vflip() explode(15, true) {
-        stl_colour(pp4_colour) foot(type);
+        translate_z(-squeeze)
+            stl_colour(pp4_colour) foot(type);
 
         if(t)
             explode(15, true)
-                translate_z(foot_thickness(type))
+                translate_z(foot_thickness(type) - squeeze)
                     if(flip)
                         nut_and_washer(nut, true);
                     else
@@ -87,9 +88,15 @@ module foot_assembly(t = 0, type = foot, flip = false) { //! Assembly with faste
     if(t)
         translate_z(t)
             if(flip)
-                screw_and_washer(screw, screw_length);
+                if(no_washer)
+                    screw(screw, screw_length);
+                else
+                    screw_and_washer(screw, screw_length);
             else
-                nut_and_washer(nut, true);
+                if(no_washer)
+                    nut(nut, true);
+                else
+                    nut_and_washer(nut, true);
 }
 
 module insert_foot(type = insert_foot) { //! Generate STL for foot with insert

printed/handle.scad

@@ -79,7 +79,8 @@ module handle_stl() { //! generate the STL
 //
 //! Place inserts in the bottom of the posts and push them home with a soldering iron with a conical bit heated to 200°C.
 //
-module handle_assembly() pose([225, 0, 150], [0, 0, 14]) //! Printed part with inserts in place
+module handle_assembly() //! Printed part with inserts in place
+pose([225, 0, 150], [0, 0, 14])
 assembly("handle", ngb = true) {
     translate_z(handle_height())
         stl_colour(pp1_colour) vflip() handle_stl();

printed/knob.scad

@@ -0,0 +1,171 @@
+//
+// NopSCADlib Copyright Chris Palmer 221
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+
+//
+//! Parametric knobs for potentiometers and encoders.
+//!
+//! A knob can be constructed by specififying all the parameters or the potentiometer can be specified to customise it for its shaft with a recess to clear the nut, washer and thread.
+//! An optional skirt and / or a pointer can be specified.
+//!
+//! The STL includes a support membrane that needs to be cut out and a thread needs to be tapped for the grub screw.
+//
+
+include <../core.scad>
+use <../utils/hanging_hole.scad>
+use <../utils/rounded_polygon.scad>
+use <../vitamins/potentiometer.scad>
+
+clearance = 0.2;
+
+function knob_name(type)     = type[0]; //! Name for the stl maker
+function knob_top_d(type)    = type[1]; //! Diameter at the top
+function knob_bot_d(type)    = type[2]; //! Diameter at the bottom
+function knob_height(type)   = type[3]; //! Height
+function knob_corner_r(type) = type[4]; //! Rounded top corner
+function knob_shaft_d(type)  = type[5]; //! Shaft diameter
+function knob_shaft_len(type)= type[6]; //! Shaft length
+function knob_flat_d(type)   = type[7]; //! The shaft diameter at the flat
+function knob_flat_h(type)   = type[8]; //! The length of the flat
+function knob_screw(type)    = type[9]; //! The grub screw type
+function knob_skirt(type)    = type[10]; //! Skirt diameter and thickness
+function knob_recess(type)   = type[11]; //! Recess diameter and thickness to clear nut and thread, diameter, nut height, thread height
+function knob_pointer(type)  = type[12]; //! Pointer outside radius, [point width, back width] and height height
+
+function knob(name = "knob", top_d = 12, bot_d = 15, height = 18, shaft_length, skirt = [20, 2], pointer = false, corner_r = 2, screw = M3_grub_screw, shaft_d, flat_d, flat_h, recess) = //! Constructor
+[
+    name, top_d, bot_d, height, corner_r, shaft_d, shaft_length, flat_d, flat_h, screw, skirt, recess, pointer
+];
+
+function knob_for_pot(pot, thickness, z = 1, washer = true, top_d = 12, bot_d = 15, height = 0, shaft_length = undef, skirt = [20, 2], pointer = false, corner_r = 2, screw = M3_grub_screw) =  //! Construct a knob to fit specified pot
+    let(s = pot_shaft(pot),
+        washer = washer && pot_washer(pot) ? pot_washer(pot) : [0, 0],
+        nut = pot_nut(pot) ? pot_nut(pot) : [pot_thread_d(pot) * cos(30), pot_thread_h(pot) - thickness],
+        shaft_length = is_undef(shaft_length) ? s.z : min(shaft_length, s.z),
+        h = round_to_layer(shaft_length + pot_thread_h(pot) - thickness - z),
+        height = max(height, h + 1),
+        recess = [(z > washer.y ? nut.x / cos(30) : washer.x) + 0.4, round_to_layer(nut.y + washer.y - z + layer_height), round_to_layer(pot_thread_h(pot) - z - thickness + 2 * layer_height)],
+        flat_d = s.y + 0.06,
+        flat_h = min(s[3], shaft_length)
+    )
+    knob(name = str(pot[0], "_knob"),
+         top_d = top_d,
+         bot_d = bot_d,
+         height = height,
+         corner_r = corner_r,
+         screw = screw,
+         skirt = skirt,
+         pointer = pointer,
+         shaft_d = s.x,
+         shaft_length = h,
+         flat_d = flat_d,
+         flat_h = flat_h,
+         recess = recess);
+
+function knob_screw_z(type) = knob_shaft_len(type) - knob_flat_h(type) / 2;
+
+module knob(type, supports = true) { //! Generate the STL for a knob
+    r_top = knob_top_d(type) / 2;
+    r_bot = knob_bot_d(type) / 2;
+    h = knob_height(type);
+    r = knob_corner_r(type);
+    screw = knob_screw(type);
+    sr = knob_shaft_d(type) / 2 + (screw ? clearance : 0);
+    top_wall = h - knob_shaft_len(type);
+    fr = knob_flat_d(type) - sr + 2 * clearance;
+    fh = knob_flat_h(type);
+    skirt = knob_skirt(type);
+    recess = knob_recess(type);
+    pointer = knob_pointer(type);
+
+    stl(knob_name(type))
+    {
+        difference() {
+            union() {
+                rotate_extrude() {
+                    rounded_polygon([
+                        [0, h, 0],
+                        [r_top - r, h - r, r],
+                        [r_bot, 0, 0],
+                        [0, 0, 0],
+                    ]);
+
+                    if(skirt)
+                        square([skirt.x / 2, skirt.y]);
+                }
+                if(pointer)
+                    linear_extrude(pointer.z)
+                        rotate(-90)
+                            hull() {
+                                translate([pointer.x, 0])
+                                    square([eps, pointer.y[0]], center = true);
+
+                                translate([r_bot, 0])
+                                    square([eps, pointer.y[1]], center = true);
+                            }
+            }
+            shaft_z = recess ? recess.z + (supports ? layer_height : -eps) : -eps;
+            translate_z(shaft_z) {
+                h = h - top_wall - shaft_z;
+                linear_extrude(h)
+                    difference() {
+                        poly_circle(sr);
+
+                        if(fr > 0)
+                            translate([-sr, fr])
+                                square([2 * sr, sr]);
+                    }
+
+                if(h > fh)
+                    poly_cylinder(sr, round_to_layer(h - fh), center = false);
+            }
+
+            if(recess)
+                translate_z(-eps)
+                    hull() {
+                        poly_cylinder(r = recess.x / 2, h = recess.y + eps, center = false);
+
+                        linear_extrude(recess.z + eps)
+                            offset(min(-(recess.z - recess.y), 0))
+                                poly_circle(recess.x / 2);
+                    }
+
+            if(screw)
+                translate_z(knob_screw_z(type))
+                    rotate([90, 0, 180])
+                        teardrop_plus(r = screw_pilot_hole(screw), h = max(r_top, r_bot) + eps, center = false);
+        }
+    }
+}
+
+//! Knob with grub screw in place
+module knob_assembly(type) explode(40, explode_children = true) { //! Assembly with the grub screw in place
+    sr = knob_shaft_d(type) / 2;
+    fr = knob_flat_d(type) < sr ? knob_flat_d(type) - sr : sr;
+    r_top = knob_top_d(type) / 2;
+    r_bot = knob_bot_d(type) / 2;
+    screw_length = screw_shorter_than(min(r_top, r_bot) - fr);
+    screw = knob_screw(type);
+
+    stl_colour(pp1_colour) render() knob(type, supports = false);
+
+    if(screw)
+        translate([0, (fr + screw_length), knob_screw_z(type)])
+            rotate([90, 0, 180])
+                screw(screw, screw_length);
+}

printed/pocket_handle.scad

@@ -137,7 +137,7 @@ module pocket_handle_assembly(type) { //! Assembly with fasteners in place
 
     translate_z(f.z + t / 2) hflip() {
         stl_colour(pp1_colour)
-            pocket_handle(type);
+            render() pocket_handle(type);
 
         pocket_handle_hole_positions(type) {
             translate_z(f.z + t)

printed/press_fit.scad

@@ -22,7 +22,7 @@
 //!
 //! Add solvent or glue to make a permanent fixture.
 //
-include <../core.scad>
+include <../utils/core/core.scad>
 
 interference = 0.0;
 

printed/printed_box.scad

@@ -26,7 +26,9 @@
 //!
 //! It can also have printed feet on the base with the screws doubling up to hold the base on.
 //
-include <../core.scad>
+include <../utils/core/core.scad>
+use <../vitamins/screw.scad>
+use <../vitamins/washer.scad>
 use <../vitamins/insert.scad>
 use <foot.scad>
 

printed/printed_pulleys.scad

@@ -21,8 +21,8 @@
 //! Creative Commons - Attribution - Share Alike license (see <https://creativecommons.org/licenses/by-sa/3.0/>)
 //
 
-include <../core.scad>
-include <../vitamins/pulleys.scad>
+include <../utils/core/core.scad>
+use <../vitamins/pulley.scad>
 
 printed_pulley_GT2_profile = [[0.747183,-0.5],[0.747183,0],[0.647876,0.037218],[0.598311,0.130528],[0.578556,0.238423],[0.547158,0.343077],[0.504649,0.443762],[0.451556,0.53975],[0.358229,0.636924],[0.2484,0.707276],[0.127259,0.750044],[0,0.76447],[-0.127259,0.750044],[-0.2484,0.707276],[-0.358229,0.636924],[-0.451556,0.53975],[-0.504797,0.443762],[-0.547291,0.343077],[-0.578605,0.238423],[-0.598311,0.130528],[-0.648009,0.037218],[-0.747183,0],[-0.747183,-0.5]];
 

printed/psu_shroud.scad

@@ -27,6 +27,7 @@ use <../vitamins/insert.scad>
 use <../vitamins/wire.scad>
 use <../vitamins/psu.scad>
 use <../utils/round.scad>
+use <../vitamins/terminal.scad>
 
 wall = 1.8;
 top = 1.5;
@@ -41,6 +42,7 @@ overlap = 6;
 cable_tie_inset = wall + 4;
 
 function psu_shroud_extent(type) = 15 + wall;                                   //! How far it extends beyond the PSU to clear the connections
+function psu_shroud_wall(type) = wall;                                          //! The wall thickness
 function psu_shroud_depth(type) =                                               //! Outside depth of the shroud
     psu_left_bay(type) + overlap + psu_shroud_extent(type);
 
@@ -154,7 +156,7 @@ assembly(str("PSU_shroud_", name), ngb = true) {
             insert(insert);
 }
 
-module psu_shroud_fastened_assembly(type, cable_d, thickness, name, cables = 1) //! Assembly with screws in place
+module psu_shroud_fastened_assembly(type, cable_d, thickness, name, cables = 1, screw = screw) //! Assembly with screws in place
 {
     screw_length = screw_length(screw,thickness + counter_bore, 2, true);
 

printed/ribbon_clamp.scad

@@ -18,7 +18,10 @@
 //
 
 //
-//! Clamp for ribbon cable and polypropylene strip.
+//! Clamp for ribbon cable and polypropylene strip or one or more ribbon cables.
+//!
+//! * When `ways` is a scalar number the slot is sized for one rubbon cable and a PP strip.
+//! * When `ways` is a two element vector the second element indicates the number of cables and the slot is size for just the cables.
 //
 include <../core.scad>
 use <../vitamins/insert.scad>
@@ -34,7 +37,8 @@ function ribbon_clamp_hole_pitch(ways, screw = screw) =
 
 function ribbon_clamp_width(screw = screw) = 2 * (insert_hole_radius(screw_insert(screw)) + wall); //! Width
 function ribbon_clamp_length(ways, screw = screw) = ribbon_clamp_hole_pitch(ways, screw) + ribbon_clamp_width(screw); //! Length given ways
-function ribbon_clamp_height(screw = screw) = ribbon_clamp_screw_depth(screw) + 1; //! Height
+function ribbon_clamp_height(screw = screw, ways = undef) = ribbon_clamp_screw_depth(screw) + 1 +  //! Height
+        (!is_undef(ways) && is_list(ways) ?  (ways[1] - 1) * inch(0.05) : 0);
 
 module ribbon_clamp_hole_positions(ways, screw = screw, side = undef) //! Place children at hole positions
     for(x = is_undef(side) ? [-1, 1] : side)
@@ -45,16 +49,20 @@ module ribbon_clamp_holes(ways, h = 20, screw = screw) //! Drill screw holes
     ribbon_clamp_hole_positions(ways, screw)
         drill(screw_clearance_radius(screw), h);
 
+function str_ways(ways) = is_list(ways) ? str(ways[0], "_", ways[1]) : str(ways);
+function str_screw_d(screw_d) = screw_d != 3 ? str("_", screw_d) : "";
+
 module ribbon_clamp(ways, screw = screw) { //! Generate STL for given number of ways
     screw_d = screw_radius(screw) * 2;
 
     pitch = ribbon_clamp_hole_pitch(ways, screw);
     d = ribbon_clamp_width(screw);
-    h = ribbon_clamp_height(screw);
-    t = round_to_layer(ribbon_clamp_slot_depth() + wall);
+    h = ribbon_clamp_height(screw, ways);
+    slot_d = is_list(ways) ? ways[1] * inch(0.05) : ribbon_clamp_slot_depth();
+    t = round_to_layer(slot_d + wall);
     insert = screw_insert(screw);
 
-    stl(str("ribbon_clamp_", ways, screw_d != 3 ? str("_", screw_d) : ""))
+    stl(str("ribbon_clamp_", str_ways(ways), str_screw_d(screw_d)))
         difference() {
             union() {
                 hull() {
@@ -72,7 +80,7 @@ module ribbon_clamp(ways, screw = screw) { //! Generate STL for given number of
             }
 
             translate_z(h)
-                cube([ribbon_clamp_slot(ways), d + 1, ribbon_clamp_slot_depth() * 2], center = true);
+                cube([ribbon_clamp_slot(ways), d + 1, slot_d * 2], center = true);
 
             ribbon_clamp_hole_positions(ways, screw)
                 translate_z(h)
@@ -81,9 +89,10 @@ module ribbon_clamp(ways, screw = screw) { //! Generate STL for given number of
         }
 }
 
-module ribbon_clamp_assembly(ways, screw = screw) pose([55, 180, 25])  //! Printed part with inserts in place
-    assembly(let(screw_d = screw_radius(screw) * 2)str("ribbon_clamp_", ways, screw_d != 3 ? str("_", screw_d) : ""), ngb = true) {
-    h = ribbon_clamp_height(screw);
+module ribbon_clamp_assembly(ways, screw = screw)  //! Printed part with inserts in place
+pose([55, 180, 25])
+assembly(let(screw_d = screw_radius(screw) * 2)str("ribbon_clamp_", str_ways(ways), str_screw_d(screw_d)), ngb = true) {
+    h = ribbon_clamp_height(screw, ways);
     insert = screw_insert(screw);
 
     stl_colour(pp1_colour) render()

scripts/blurb.py

@@ -81,7 +81,7 @@ def scrape_code(scad_file):
             match = re.match(r'^function (.*?\(.*?\)).*?(?://! ?(.*))$', line)
             if match:
                 functions[match.group(1)] = match.group(2)
-        match = re.match(r'^module (.*?\(.*?\)).*?(?://! ?(.*))$', line)
+        match = re.match(r'^module (.*?\(.*\)).*?(?://! ?(.*))$', line)
         if match:
             modules[match.group(1)] = match.group(2)
 

scripts/changelog.py

@@ -24,6 +24,7 @@ from __future__ import print_function
 import sys
 import subprocess
 import re
+from tests import do_cmd
 
 filename = 'CHANGELOG.md'
 
@@ -81,6 +82,7 @@ def codify(word, url):
 
 
 def fixup_comment(comment, url):
+    comment = comment.replace('cnc_bit+_r', 'cnc_bit_r')
     """ markup code words and fix new paragraphs """
     result = ''
     word = ''
@@ -160,5 +162,6 @@ if __name__ == '__main__':
 
             # Print commits excluding merges
 
-            if not c.comment.startswith('Merge branch') and not c.comment.startswith('Merge pull') and not re.match(r'U..ated changelog.*', c.comment):
+            if not c.comment.startswith('Merge branch') and not c.comment.startswith('Merge pull') and not re.match(r'U..ated chang.*log.*', c.comment):
                 print('* %s [`%s`](%s "show commit") %s %s\n' % (c.date, c.hash[:7], url + '/commit/' + c.hash, initials(c.author), fixup_comment(c.comment, url)), file = file)
+    do_cmd(('codespell -w -L od ' + filename).split())

scripts/exports.py

@@ -139,6 +139,7 @@ def make_parts(target, part_type, parts = None):
                                             #
                                             part_maker_name = tmp_dir + '/' + part_type + ".scad"
                                             with open(part_maker_name, "w") as f:
+                                                f.write("include <NopSCADlib/global_defs.scad>\n")
                                                 f.write("use <%s/%s>\n" % (reltmp(dir, target), filename))
                                                 f.write("%s();\n" % module);
                                             t = time.time()

scripts/options.py

@@ -17,7 +17,7 @@
 # If not, see <https://www.gnu.org/licenses/>.
 #
 
-# Set command line options from enviroment variables and check if they have changed
+# Set command line options from environment variables and check if they have changed
 
 import json, os, deps
 from colorama import Fore, init

scripts/render.py

@@ -94,11 +94,13 @@ def render(target, type):
             cam = "--camera=0,0,0,70,0,315,500" if type == 'stl' else "--camera=0,0,0,0,0,0,500"
             render = "--preview" if type == 'stl' or colour != pp1 else "--render"
             tmp_name = tmp_dir + '/' + part[:-4] + '.png'
-            openscad.run("-o", tmp_name, png_maker_name, colour_scheme, "--projection=p", "--imgsize=4096,4096", cam, render, "--autocenter", "--viewall");
+            dummy_deps_name = tmp_dir + '/tmp.deps' # work around for OpenSCAD issue #3879
+            openscad.run("-o", tmp_name, png_maker_name, colour_scheme, "--projection=p", "--imgsize=4096,4096", cam, render, "--autocenter", "--viewall", "-d", dummy_deps_name)
             do_cmd(("magick "+ tmp_name + " -trim -resize 280x280 -background %s -gravity Center -extent 280x280 -bordercolor %s -border 10 %s"
                     % (background, background, tmp_name)).split())
             update_image(tmp_name, png_name)
             os.remove(png_maker_name)
+            os.remove(dummy_deps_name)
     #
     # Remove tmp dir
     #

scripts/tests.py

@@ -72,6 +72,8 @@ def update_image(tmp_name, png_name):
     if pixels < 0 or pixels > threshold:
         shutil.copyfile(tmp_name, png_name)
         print(Fore.YELLOW + png_name + " updated" + Fore.WHITE, pixels if pixels > 0 else '')
+        if png_name.endswith('_tn.png') and os.path.isfile(diff_name):
+            os.remove(diff_name)
     else:
         os.utime(png_name, None)
         os.remove(diff_name)

scripts/tmpdir.py

@@ -25,6 +25,7 @@ import time
 def mktmpdir(top_dir):
     tmp_dir = top_dir + 'tmp'
     if not os.path.isdir(tmp_dir):
+        time.sleep(0.1)
         os.makedirs(tmp_dir)
     else:
         for file in os.listdir(tmp_dir):

scripts/views.py

@@ -82,7 +82,7 @@ def bom_to_assemblies(bom_dir, bounds_map):
     return [assembly["name"] for  assembly in flat_bom]
 
 def eop(doc_file, last = False, first = False):
-    print('<span></span>', file = doc_file)     # An invisable marker for page breaks because markdown takes much longer if the document contains a div
+    print('<span></span>', file = doc_file)     # An invisible marker for page breaks because markdown takes much longer if the document contains a div
     if not first:
         print('[Top](#TOP)', file = doc_file)
     if not last:
@@ -216,6 +216,7 @@ def views(target, do_assemblies = None):
                                                 #
                                                 png_maker_name = tmp_dir + '/png.scad'
                                                 with open(png_maker_name, "w") as f:
+                                                    f.write("include <NopSCADlib/global_defs.scad>\n")
                                                     f.write("use <%s/%s>\n" % (reltmp(dir, target), filename))
                                                     f.write("%s();\n" % module);
                                                 t = time.time()

tests/7_segments.scad

@@ -0,0 +1,31 @@
+//
+// NopSCADlib Copyright Chris Palmer 2021
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+include <../utils/core/core.scad>
+use <../utils/layout.scad>
+
+include <../vitamins/7_segments.scad>
+
+function digits(s) = 7_segment_digits(s) < 2 ? 2 : 1;
+
+module 7_segments()
+    layout([for(s = 7_segments) 7_segment_size(s).x * digits(s)], 3) let(s = 7_segments[$i])
+        7_segment_digits(s, digits(s));
+
+if($preview)
+    7_segments();

tests/DIP.scad

@@ -16,7 +16,7 @@
 // You should have received a copy of the GNU General Public License along with NopSCADlib.
 // If not, see <https://www.gnu.org/licenses/>.
 //
-include <../core.scad>
+include <../utils/core/core.scad>
 use <../vitamins/dip.scad>
 
 dips = [[6, "OPTO"], [8, "NE555"], [14, "74HC00"], [16, "ULN2003"], [18, "ULN2803"], [20, "74HC245"], [28, "ATMEGA328"]];

tests/LDRs.scad

@@ -16,7 +16,7 @@
 // You should have received a copy of the GNU General Public License along with NopSCADlib.
 // If not, see <https://www.gnu.org/licenses/>.
 //
-include <../core.scad>
+include <../utils/core/core.scad>
 include <../vitamins/ldrs.scad>
 
 use <../utils/layout.scad>

tests/PCB.scad

@@ -22,6 +22,8 @@ include <../vitamins/d_connectors.scad>
 include <../vitamins/leds.scad>
 include <../vitamins/axials.scad>
 include <../vitamins/smds.scad>
+include <../vitamins/7_segments.scad>
+include <../vitamins/potentiometers.scad>
 
 use <../vitamins/pcb.scad>
 
@@ -46,7 +48,7 @@ TMC2130 = ["TMC2130", "TMC2130",
     []
 ];
 
-test_pcb = ["TestPCB", "Test PCB",
+test_pcb = ["test_pcb", "Test PCB",
     100, 250, 1.6, // length, width, thickness
     3,      // Corner radius
     2.75,   // Mounting hole diameter
@@ -95,6 +97,8 @@ test_pcb = ["TestPCB", "Test PCB",
         [ 65,  12,   0, "ax_res", res1_8, 1000],
         [ 65,  17,   0, "ax_res", res1_4, 10000],
         [ 65,  22,   0, "ax_res", res1_2, 100000],
+        [ 55,  22,   0, "vero_pin"],
+        [ 55,  17,   0, "vero_pin", true],
 
         [ 80,   9,   0, "link", inch(0.2), inch(0.4)],
         [ 80,  12,   0, "ax_res", res1_8, 1000000, 1, inch(0.1)],
@@ -137,7 +141,8 @@ test_pcb = ["TestPCB", "Test PCB",
         [ 52, 194,   0, "2p54socket", 8, 1, false, 0, false, "red" ],
         [ 50, 220,   0, "standoff",  5, 4.5, 12.5, 2.54],
         [ 50, 240,   0, "potentiometer"],
-        [ 75, 240,   0, "potentiometer", 7, 8],
+        [ 75, 240,   0, "potentiometer", KY_040_encoder, 8],
+        [ 30,  85,   -90, "7seg", WT5011BSR, 2],
     ],
     // accessories
     []

tests/PCBs.scad

@@ -21,7 +21,7 @@ include <../vitamins/pcbs.scad>
 
 use <../utils/layout.scad>
 
-function spacing(p) = let(w = pcb_width(p)) w < 22 ? w + 3 : w + 10;
+function spacing(p) = let(w = pcb_width(p)) w < 22 ? w + 3 : w + 7;
 
 module pcbs() {
     layout([for(p = pcbs) spacing(p)], 0)
@@ -29,9 +29,9 @@ module pcbs() {
             rotate(90)
                 pcb_assembly(pcbs[$i], 5 + $i, 3);
 
-    translate([0, 45])
+    translate([0, 65])
         layout([for(p = tiny_pcbs) pcb_length(p)], 3)
-            translate([0, pcb_width(tiny_pcbs[$i]) / 2])
+            translate([0, -pcb_width(tiny_pcbs[$i]) / 2])
                  pcb_assembly(tiny_pcbs[$i], 5 + $i, 3);
 
     translate([0, 120])

tests/PSUs.scad

@@ -16,20 +16,33 @@
 // You should have received a copy of the GNU General Public License along with NopSCADlib.
 // If not, see <https://www.gnu.org/licenses/>.
 //
+show_cutout = false;
+
 include <../core.scad>
 include <../vitamins/psus.scad>
 
 use <../utils/layout.scad>
 
+
+
 module psus()
-    layout([for(p = psus) psu_width(p)], 10) let(p = psus[$i])
+    layout([for(p = psus) atx_psu(p) ? psu_length(p) : psu_width(p)], 10) let(p = psus[$i])
     rotate(atx_psu(p) ? 0 : 90) {
         psu(p);
 
-        psu_screw_positions(p)
-            translate_z(3)
-                screw_and_washer(psu_screw(p), 8);
+        if (psu_screw(p))
+            psu_screw_positions(p)
+                translate_z(3)
+                    screw_and_washer(psu_screw(p), 8);
+
+        if(show_cutout && atx_psu(p))
+            #atx_psu_cutout(p);
     }
 
-if($preview)
+if($preview) {
     psus();
+
+    for(p = psus_not_shown)
+        hidden()
+            psu(p);
+}

tests/SK_brackets.scad

@@ -22,18 +22,20 @@ include <../vitamins/extrusions.scad>
 
 use <../utils/layout.scad>
 
-module sk_brackets() {
+module sk_brackets(examples = false) {
     screws = [M4_dome_screw, M4_cap_screw, M5_cap_screw, M5_cap_screw];
     nuts = [M4_hammer_nut, M4_sliding_t_nut, M5_sliding_t_nut, undef];
     // channel depth = 6 for 2020 extrusion, 9 for 3030 extrusion
     depths = [6, 6, 9, 0];
     layout([for(s = sk_brackets) 1.5 * sk_size(s)[1]]) {
         sk_bracket_assembly(sk_brackets[$i], screw_type = screws[$i], nut_type = nuts[$i], max_screw_depth = depths[$i]);
-        translate([0, -sk_hole_offset(sk_brackets[$i]) - extrusion_width($i < 2 ? E2020 : E3030) / 2, 0])
-            rotate([0, 90, 0])
-                extrusion($i < 2 ? E2020 : E3030, 20, false);
+
+        if(examples)
+            translate([0, -sk_hole_offset(sk_brackets[$i]) - extrusion_width($i < 2 ? E2020 : E3030) / 2, 0])
+                rotate([0, 90, 0])
+                    extrusion($i < 2 ? E2020 : E3030, 20, false);
     }
 }
 
 if($preview)
-    sk_brackets();
+    sk_brackets(true);

tests/SSR_shroud.scad

@@ -16,7 +16,7 @@
 // You should have received a copy of the GNU General Public License along with NopSCADlib.
 // If not, see <https://www.gnu.org/licenses/>.
 //
-include <../core.scad>
+include <../utils/core/core.scad>
 include <../vitamins/ssrs.scad>
 
 use <../utils/layout.scad>

tests/ball_bearings.scad

@@ -16,15 +16,28 @@
 // You should have received a copy of the GNU General Public License along with NopSCADlib.
 // If not, see <https://www.gnu.org/licenses/>.
 //
-include <../core.scad>
+include <../utils/core/core.scad>
 use <../utils/layout.scad>
 
 include <../vitamins/ball_bearings.scad>
 
-module ball_bearings()
-    layout([for(b = ball_bearings) bb_diameter(b)])
-        ball_bearing(ball_bearings[$i])
-            bearing_ball(3);
+
+module do_bearings(list)
+    layout([for(b = list) bb_diameter(b)])
+        ball_bearing(list[$i])
+            if (bb_width(list[$i]) >= 5)
+                bearing_ball(3);
+
+module ball_bearings() {
+    small_bearings = [for(b = ball_bearings) if(bb_diameter(b) < 12) b];
+    big_bearings = [for(b = ball_bearings) if(!in(small_bearings, b)) b];
+
+    translate([0, 0])
+        do_bearings(big_bearings);
+
+    translate([0, -20])
+        do_bearings(small_bearings);
+}
 
 if($preview)
     ball_bearings();

tests/butt_box.scad

@@ -25,7 +25,7 @@ include <../printed/butt_box.scad>
 
 $explode = 0;
 
-box = bbox(screw = M3_dome_screw, sheets = DiBond, base_sheet = DiBond6, top_sheet = PMMA3, span = 250, size = [400, 300, 120]);
+box = bbox(screw = M3_dome_screw, sheets = DiBond, base_sheet = DiBond6, top_sheet = PMMA3, span = 150, size = [300, 200, 120]);
 
 module bbox_assembly() _bbox_assembly(box);
 

tests/camera_housing.scad

@@ -16,7 +16,7 @@
 // You should have received a copy of the GNU General Public License along with NopSCADlib.
 // If not, see <https://www.gnu.org/licenses/>.
 //
-include <../core.scad>
+include <../utils/core/core.scad>
 use <../utils/layout.scad>
 
 use <../printed/camera_housing.scad>

tests/components.scad

@@ -42,6 +42,9 @@ module components() {
         TO220("Generic TO220 package");
 
     translate([40, 50])
+        TO247("Generic TO247 package");
+
+    translate([40, 80])
         panel_USBA();
 
     translate([80, 50])

tests/core_xy.scad

@@ -19,7 +19,6 @@
 
 include <../core.scad>
 include <../vitamins/pulleys.scad>
-include <../vitamins/screws.scad>
 include <../vitamins/stepper_motors.scad>
 include <../vitamins/washers.scad>
 
@@ -31,22 +30,25 @@ module coreXY_belts_test() {
     plain_idler = coreXY_plain_idler(coreXY_type);
     toothed_idler = coreXY_toothed_idler(coreXY_type);
 
+    pos = [100, 50];
     coreXYPosBL = [0, 0, 0];
     coreXYPosTR = [200, 150, 0];
     separation = [0, coreXY_coincident_separation(coreXY_type).y, pulley_height(plain_idler) + washer_thickness(M3_washer)];
-    pos = [100, 50];
+    x_gap = 10;
 
-    upper_drive_pulley_offset = [40, 10];
+    plain_idler_offset = [10, 5];
+    upper_drive_pulley_offset = [40, 0];
     lower_drive_pulley_offset = [0, 0];
 
     coreXY_belts(coreXY_type,
-        carriagePosition = pos,
-        coreXYPosBL = coreXYPosBL,
-        coreXYPosTR = coreXYPosTR,
-        separation = separation,
-        x_gap = 10,
-        upper_drive_pulley_offset = upper_drive_pulley_offset,
-        lower_drive_pulley_offset = lower_drive_pulley_offset,
+        pos,
+        coreXYPosBL,
+        coreXYPosTR,
+        separation,
+        x_gap,
+        plain_idler_offset,
+        upper_drive_pulley_offset,
+        lower_drive_pulley_offset,
         show_pulleys = true);
 
 
@@ -57,18 +59,18 @@ module coreXY_belts_test() {
 
         // add the screws for the upper drive offset idler pulleys if required
         if (upper_drive_pulley_offset.x > 0) {
-            translate(coreXY_drive_plain_idler_offset(coreXY_type))
-                translate_z(-pulley_offset(plain_idler))
+            translate(coreXY_drive_plain_idler_offset(coreXY_type) + plain_idler_offset)
+                translate([0, -upper_drive_pulley_offset.y, -pulley_offset(plain_idler)])
                     screw(M3_cap_screw, 20);
             translate(coreXY_drive_toothed_idler_offset(coreXY_type))
-                translate_z(-pulley_offset(toothed_idler))
+                translate([0, -upper_drive_pulley_offset.y, -pulley_offset(toothed_idler)])
                     screw(M3_cap_screw, 20);
          } else if (upper_drive_pulley_offset.x < 0) {
-            translate([-pulley_od(plain_idler), coreXY_drive_plain_idler_offset(coreXY_type).y])
-                translate_z(-pulley_offset(plain_idler))
+            translate([-pulley_od(plain_idler), coreXY_drive_plain_idler_offset(coreXY_type).y + plain_idler_offset.y])
+                translate([0, -upper_drive_pulley_offset.y, -pulley_offset(plain_idler)])
                     screw(M3_cap_screw, 20);
-            translate([2*coreXY_drive_pulley_x_alignment(coreXY_type), coreXY_drive_toothed_idler_offset(coreXY_type).y])
-                translate_z(-pulley_offset(toothed_idler))
+            translate([2*coreXY_drive_pulley_x_alignment(coreXY_type) + plain_idler_offset.x, coreXY_drive_toothed_idler_offset(coreXY_type).y])
+                translate([0, -upper_drive_pulley_offset.y, -pulley_offset(toothed_idler)])
                     screw(M3_cap_screw, 20);
         }
     }
@@ -80,18 +82,18 @@ module coreXY_belts_test() {
 
         // add the screws for the lower drive offset idler pulleys if required
         if (lower_drive_pulley_offset.x < 0) {
-            translate([-coreXY_drive_plain_idler_offset(coreXY_type).x, coreXY_drive_plain_idler_offset(coreXY_type).y])
-                translate_z(-pulley_offset(plain_idler))
+            translate([-coreXY_drive_plain_idler_offset(coreXY_type).x - plain_idler_offset.x, coreXY_drive_plain_idler_offset(coreXY_type).y + plain_idler_offset.y])
+                translate([0, -lower_drive_pulley_offset.y, -pulley_offset(plain_idler)])
                     screw(M3_cap_screw, 20);
             translate(coreXY_drive_toothed_idler_offset(coreXY_type))
-                translate_z(-pulley_offset(toothed_idler))
+                translate([0, -lower_drive_pulley_offset.y, -pulley_offset(toothed_idler)])
                     screw(M3_cap_screw, 20);
         } else if (lower_drive_pulley_offset.x > 0) {
-            translate([pulley_od(plain_idler), coreXY_drive_plain_idler_offset(coreXY_type).y])
-                translate_z(-pulley_offset(plain_idler))
+            translate([pulley_od(plain_idler), coreXY_drive_plain_idler_offset(coreXY_type).y + plain_idler_offset.y])
+                translate([0, -lower_drive_pulley_offset.y, -pulley_offset(plain_idler)])
                     screw(M3_cap_screw, 20);
-            translate([-2*coreXY_drive_pulley_x_alignment(coreXY_type), coreXY_drive_toothed_idler_offset(coreXY_type).y])
-                translate_z(-pulley_offset(toothed_idler))
+            translate([-2*coreXY_drive_pulley_x_alignment(coreXY_type) - plain_idler_offset.x, coreXY_drive_toothed_idler_offset(coreXY_type).y])
+                translate([0, -lower_drive_pulley_offset.y, -pulley_offset(toothed_idler)])
                     screw(M3_cap_screw, 20);
         }
     }
@@ -119,13 +121,13 @@ module coreXY_belts_test() {
         translate([coreXYPosBL.x, coreXY_toothed_idler_offset(coreXY_type).y, 0])
             screw(M3_cap_screw, 20);
         // add the screw for the left Y carriage plain idler
-        translate([coreXYPosBL.x + separation.x + coreXY_plain_idler_offset(coreXY_type).x, separation.y + coreXY_plain_idler_offset(coreXY_type).y, separation.z])
+        translate([coreXYPosBL.x + separation.x + coreXY_plain_idler_offset(coreXY_type).x + (upper_drive_pulley_offset.x == 0 ? 0 : plain_idler_offset.x), separation.y + coreXY_plain_idler_offset(coreXY_type).y, separation.z])
             screw(M3_cap_screw, 20);
         // add the screw for the right Y carriage toothed idler
         translate([coreXYPosTR.x + separation.x, coreXY_toothed_idler_offset(coreXY_type).y, separation.z])
             screw(M3_cap_screw, 20);
         // add the screw for the right Y carriage plain idler
-        translate([coreXYPosTR.x - coreXY_plain_idler_offset(coreXY_type).x, separation.y + coreXY_plain_idler_offset(coreXY_type).y, 0])
+        translate([coreXYPosTR.x - coreXY_plain_idler_offset(coreXY_type).x - (lower_drive_pulley_offset.x == 0 ? 0 : plain_idler_offset.x), separation.y + coreXY_plain_idler_offset(coreXY_type).y, 0])
             screw(M3_cap_screw, 20);
     }
 }

tests/corner_block.scad

@@ -22,11 +22,18 @@ use <../printed/corner_block.scad>
 screws = [M2_cap_screw, M2p5_pan_screw, M3_dome_screw, M4_dome_screw];
 
 module do_corner_block(screw)
-    if($preview)
+    if($preview) {
         fastened_corner_block_assembly(3, screw = screw);
-    else
+
+        translate([0, 30])
+            fastened_2screw_block_assembly(3, screw = screw);
+    }
+    else {
         corner_block(screw);
 
+        translate([0, 30])
+            2screw_block(screw);
+    }
 module corner_blocks()
     for(i = [0 : len(screws) - 1])
         translate([i * 30, 0])

tests/displays.scad

@@ -24,7 +24,10 @@ use <../vitamins/pcb.scad>
 
 module displays()
     layout([for(d = displays) pcb_length(display_pcb(d))], 10)
-        display(displays[$i]);
+        translate([0, pcb_width(displays[$i]) / 2])
+            vflip()
+                display(displays[$i]);
 
 if($preview)
-    displays();
+    let($show_threads = true)
+        displays();

tests/extrusion_brackets.scad

@@ -16,13 +16,51 @@
 // You should have received a copy of the GNU General Public License along with NopSCADlib.
 // If not, see <https://www.gnu.org/licenses/>.
 //
-include <../utils/core/core.scad>
+include <../core.scad>
 
-include <../vitamins/extrusion_brackets.scad>
 include <../vitamins/extrusions.scad>
+include <../vitamins/extrusion_brackets.scad>
 include <../vitamins/washers.scad>
 include <../vitamins/nuts.scad>
 
+module inner_bracket_test(bracket, backwards = false)
+    rotate([90, 0, 180]) {
+        extrusion = extrusion_inner_corner_bracket_extrusion(bracket);
+        eWidth = extrusion_width(extrusion);
+        size = extrusion_inner_corner_bracket_size(bracket);
+        tnut = extrusion_inner_corner_bracket_tnut(bracket);
+
+        translate([backwards ? -eWidth : 0, 0])
+            extrusion_inner_corner_bracket(bracket, backwards = backwards);
+
+        translate([-eWidth / 2, 0])
+            rotate([-90, 0, 0])
+                extrusion(extrusion, size.x - nut_thickness(tnut) - extrusion_tab_thickness(extrusion), false, cornerHole = eWidth > 20);
+
+        translate([-eWidth, -eWidth / 2])
+            rotate([0, 90, 0])
+                extrusion(extrusion, eWidth + size.y - nut_thickness(tnut) - extrusion_tab_thickness(extrusion), false, cornerHole = eWidth > 20);
+    }
+
+
+module bracket_test(bracket)
+    rotate([90, 0, 180]) {
+        extrusion = extrusion_corner_bracket_extrusion(bracket);
+        eWidth = extrusion_width(extrusion);
+        size = extrusion_corner_bracket_size(bracket);
+
+        extrusion_corner_bracket_assembly(bracket);
+
+        translate([-eWidth / 2, 0])
+            rotate([-90, 0, 0])
+                extrusion(extrusion, size.y, false, cornerHole = eWidth > 20);
+
+        translate([-eWidth, -eWidth / 2])
+            rotate([0, 90, 0])
+                extrusion(extrusion, eWidth + size.x, false, cornerHole = eWidth > 20);
+    }
+
+
 module extrusion_brackets(examples = false) {
     extrusion_inner_corner_bracket(E20_inner_corner_bracket);
 
@@ -32,34 +70,30 @@ module extrusion_brackets(examples = false) {
     translate([60, 0])
         extrusion_corner_bracket_assembly(E20_corner_bracket);
 
-    eWidth = extrusion_width(E2020);
+    translate([110, 0])
+         extrusion_inner_corner_bracket(E40_inner_corner_bracket);
+
+    translate([140, 0])
+        extrusion_corner_bracket_assembly(E40_corner_bracket);
 
     if(examples) {
-        translate([20, 60, 10]) rotate([90, 0, 180]) {
-            extrusion_inner_corner_bracket(E20_inner_corner_bracket);
+        translate([20, 50, 10])
+            inner_bracket_test(E20_inner_corner_bracket, true);
 
-            translate([-eWidth / 2, 0, 0])
-                rotate([-90, 0, 0])
-                    extrusion(E2020, 20, false);
+        translate([20, 80, 10])
+            inner_bracket_test(E20_inner_corner_bracket);
 
-            translate([-eWidth, -eWidth / 2, 0])
-                rotate([0, 90, 0])
-                    extrusion(E2020, 40, false);
-        }
+        translate([20, 120, 10])
+            bracket_test(E20_corner_bracket);
 
-        translate([100, 60, 10]) rotate([90, 0, 180]) {
-            extrusion_corner_bracket_assembly(E20_corner_bracket);
+        translate([100, 70, 10])
+            inner_bracket_test(E40_inner_corner_bracket);
 
-            translate([-eWidth / 2, 0, 0])
-                rotate([-90, 0, 0])
-                    extrusion(E2020, 30, false);
-
-            translate([-eWidth, -eWidth / 2, 0])
-                rotate([0, 90, 0])
-                    extrusion(E2020, 50, false);
-        }
+        translate([100, 130, 10])
+            bracket_test(E40_corner_bracket);
     }
 }
 
 if($preview)
-    extrusion_brackets(true);
+    let($show_threads = true)
+        extrusion_brackets(true);

tests/extrusions.scad

@@ -21,9 +21,24 @@ use <../utils/layout.scad>
 
 include <../vitamins/extrusions.scad>
 
+gap = 10;
+
 module extrusions()
-    layout([for(e = extrusions) extrusion_width(e)], 10)
-        extrusion(extrusions[$i], 80, cornerHole = extrusion_width(extrusions[$i]) > 20);
+    layout([for(e = extrusions) is_list(e[0]) ? extrusion_width(e[0]) : extrusion_width(e)], gap)
+        let(e = extrusions[$i])
+            if(is_list(e[0])) {
+                list = e;
+                heights = [for(e = list) extrusion_height(e)];
+                l = len(heights) - 1;
+                offset = (heights * [for(i = [0 : l]) 1] + l * gap) / 2;
+                translate([0, -offset])
+                    rotate(90)
+                        layout(heights, gap)
+                            rotate(-90)
+                                extrusion(list[$i], 80, cornerHole = extrusion_width(list[$i]) > 20);
+            }
+            else
+                extrusion(e, 80, cornerHole = extrusion_width(e) > 20);
 
 if ($preview)
     extrusions();

tests/jack.scad

@@ -22,12 +22,15 @@ use <../vitamins/jack.scad>
 
 module jacks() {
     translate([0, 0])
-        jack_4mm("blue",3, "royalblue");
+        jack_4mm_plastic("black",3, grey(20));
 
     translate([20, 0])
-        jack_4mm_shielded("brown", 3, "sienna");
+        jack_4mm("blue",3, "royalblue");
 
     translate([40, 0])
+        jack_4mm_shielded("brown", 3, "sienna");
+
+    translate([60, 0])
         post_4mm("red",3);
 }
 

tests/knob.scad

@@ -0,0 +1,58 @@
+//
+// NopSCADlib Copyright Chris Palmer 2021
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+z = 1; // [0: 5]
+thickness = 3; // [0: 5]
+shaft_length = 10;
+
+include <../core.scad>
+use <../printed/knob.scad>
+use <../utils/layout.scad>
+
+include <../vitamins/potentiometers.scad>
+
+knobs = [for(i = [0 : len(potentiometers) - 1]) let(p = potentiometers[i])
+     knob_for_pot(p, thickness, z, shaft_length = pot_shaft(p).z > 20 ? shaft_length : undef,
+                  top_d   = [10,    12,      20,    16,        16       ][i],
+                  bot_d   = [10,    15,      20,    20,        20       ][i],
+                  skirt   = [false, [20, 2], false,      [27, 1.5], [27, 1.5]][i],
+                  pointer = [false, false,   [14, [1, 5], 2], [13.5, [1, 1], 3], [13.5, [1, 3], 3]][i],
+                  screw = let(s = pot_shaft(p)) s.y > s.x / 2 ? M3_grub_screw : false
+                 )];
+
+
+module knobs(show_pot = false)
+    layout([for(p = potentiometers) pot_size(p).x], 5) let(p = potentiometers[$i])
+        if($preview) {
+            translate_z(z)
+                knob_assembly(knobs[$i]);
+
+            if(show_pot)
+                translate_z(-thickness)
+                    vflip() {
+                        potentiometer(p, shaft_length = shaft_length);
+
+                        translate_z(-thickness)
+                            pot_nut(p);
+                    }
+        }
+        else
+            knob(knobs[$i]);
+
+
+knobs(true);

tests/microview.scad

@@ -16,7 +16,7 @@
 // You should have received a copy of the GNU General Public License along with NopSCADlib.
 // If not, see <https://www.gnu.org/licenses/>.
 //
-include <../core.scad>
+include <../utils/core/core.scad>
 use <../vitamins/microview.scad>
 
 microview(!$preview);

tests/nuts.scad

@@ -52,6 +52,12 @@ module nuts() {
 
             if(n == M5_nut)
                 sliding_t_nut(M5_sliding_t_nut);
+
+            if(n == M6_nut)
+                sliding_t_nut(M6_sliding_t_nut);
+
+            if(n == M8_nut)
+                sliding_t_nut(M8_sliding_ball_t_nut);
         }
 
         translate([0, 80]) {

tests/pin_headers.scad

@@ -64,8 +64,9 @@ module pin_headers() {
             pin_socket(pin_headers[$i], 3, 3, right_angle = true);
     }
 
-    for(i = [0, 1], p = [5, 2][i], j = [0 , 1]) {
-        h = [jst_ph_header, jst_xh_header][j];
+    headers = [jst_zh_header, jst_ph_header, jst_xh_header];
+    for(i = [0, 1], p = [5, 2][i], j = [0 : len(headers) - 1]) {
+        h = headers[j];
         translate([-20 * (i + 1), 0 + j * 40])
             jst_xh_header(h, p);