Now logs the time taken to run non OpenSCAD commands in cmd_times.txt

Changed motor wire colours and tweaked wire position and size,

.gitignore

@@ -11,3 +11,4 @@ options.json
 times.txt
 *_diff.png
 *.echo
+cmd_times.txt

CHANGELOG.md

@@ -3,6 +3,127 @@
 This changelog is generated by `changelog.py` using manually added semantic version tags to classify commits as breaking changes, additions or fixes.
 
 
+#### [v20.10.1](https://github.com/nophead/NopSCADlib/releases/tag/v20.10.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v20.10.0...v20.10.1 "diff with v20.10.0")
+*   2022-06-30 [`f44d9ae`](https://github.com/nophead/NopSCADlib/commit/f44d9ae424f407baa4f8b5187819b43b30800257 "show commit") [M.B.](# "Martin Budden") Made includes relative in `bldc_motors`.
+
+*   2022-07-15 [`1238dba`](https://github.com/nophead/NopSCADlib/commit/1238dba90ac5c48ba01abb9e7926a064353489de "show commit") [C.](# "Chris") Updated readme.
+
+*   2022-06-22 [`aec7211`](https://github.com/nophead/NopSCADlib/commit/aec72118fac218ca033264fa7b28db2bff7db10a "show commit") [M.B.](# "Martin Budden") Fixed typos.
+
+### [v20.10.0](https://github.com/nophead/NopSCADlib/releases/tag/v20.10.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v20.9.0...v20.10.0 "diff with v20.9.0")
+*   2022-07-04 [`b58a59d`](https://github.com/nophead/NopSCADlib/commit/b58a59dab70bb414dd90dc5a9055d6bf3b4f6144 "show commit") [C.](# "Chris") Updated images and readme.
+
+*   2022-07-04 [`6b6ffb2`](https://github.com/nophead/NopSCADlib/commit/6b6ffb2b74cc89ffecbcad7c304c3c4f047a8805 "show commit") [C.](# "Chris") Added SOICs to tests.
+
+*   2022-07-04 [`1e30ad2`](https://github.com/nophead/NopSCADlib/commit/1e30ad24e802dc6e075fd73185551202101d4793 "show commit") [C.](# "Chris") Added `smd_soic` to  `pcb_component()`.
+
+*   2022-07-04 [`dc715ff`](https://github.com/nophead/NopSCADlib/commit/dc715ff2b70ae98615ee43750f3bb7613b481f7b "show commit") [C.](# "Chris") Tweaked SOIC text size.
+
+*   2022-07-04 [`c57c202`](https://github.com/nophead/NopSCADlib/commit/c57c202e31c70351f38ef6299c60b0deb54bd296 "show commit") [M.](# "MS3FGX") Adjust lead sizing
+
+*   2022-07-02 [`26bfe96`](https://github.com/nophead/NopSCADlib/commit/26bfe96614741206c8da6d126edfa9eb5326cb8f "show commit") [M.](# "MS3FGX") Add SOIC SMD Package
+
+### [v20.9.0](https://github.com/nophead/NopSCADlib/releases/tag/v20.9.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v20.8.0...v20.9.0 "diff with v20.8.0")
+*   2022-07-02 [`2cc3c6e`](https://github.com/nophead/NopSCADlib/commit/2cc3c6ec7c9d8ee285d49111559d40fb2a3112e1 "show commit") [C.](# "Chris") Updated images and readme.
+
+*   2022-07-02 [`633843d`](https://github.com/nophead/NopSCADlib/commit/633843d45eacd42619581a4619752700e1cd687b "show commit") [C.](# "Chris") Added LED1206 example to PCB test.
+
+*   2022-07-02 [`1a472c8`](https://github.com/nophead/NopSCADlib/commit/1a472c8ed549e230f7df93989f3e1db729b4b281 "show commit") [M.](# "MS3FGX") Add 1206 SMD LED
+
+### [v20.8.0](https://github.com/nophead/NopSCADlib/releases/tag/v20.8.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v20.7.0...v20.8.0 "diff with v20.7.0")
+*   2022-06-23 [`ecd534b`](https://github.com/nophead/NopSCADlib/commit/ecd534b5773928b9987023bd4370f661cc750fbd "show commit") [C.P.](# "Chris Palmer") Added `NEMA_connection_pos()`.
+Changed motor wire colours and tweaked wire position and size,
+
+### [v20.7.0](https://github.com/nophead/NopSCADlib/releases/tag/v20.7.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v20.6.1...v20.7.0 "diff with v20.6.1")
+*   2022-06-21 [`28c36a4`](https://github.com/nophead/NopSCADlib/commit/28c36a4e966cceccbbdc330cf9a6fdeaa0283889 "show commit") [C.P.](# "Chris Palmer") `rounded_polygon()` now copes with the degenerate case when tangents intersect to form a sharp corner with no arc.
+Added an `offset()` function with some limitations.
+
+#### [v20.6.1](https://github.com/nophead/NopSCADlib/releases/tag/v20.6.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v20.6.0...v20.6.1 "diff with v20.6.0")
+*   2022-06-21 [`6a9af0a`](https://github.com/nophead/NopSCADlib/commit/6a9af0af8aef68978b8be248810d07c85150341b "show commit") [C.P.](# "Chris Palmer") Updates images
+
+*   2022-06-21 [`a6a0808`](https://github.com/nophead/NopSCADlib/commit/a6a08088d986dbcbc4d01c06e0475176ec8bc76f "show commit") [M.B.](# "Martin Budden") Fixed dimensions of E1515 extrusion.
+
+*   2022-06-21 [`bcf9fb3`](https://github.com/nophead/NopSCADlib/commit/bcf9fb38dfabaf93508a380b85b12e3b23f28cf8 "show commit") [M.B.](# "Martin Budden") Fixed typos.
+
+*   2022-06-21 [`06443a5`](https://github.com/nophead/NopSCADlib/commit/06443a558b407292a1e73f60c24cc90ec618d511 "show commit") [M.B.](# "Martin Budden") Standardised setting of imgsize in scripts.
+
+### [v20.6.0](https://github.com/nophead/NopSCADlib/releases/tag/v20.6.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v20.5.1...v20.6.0 "diff with v20.5.1")
+*   2022-06-14 [`18f3d43`](https://github.com/nophead/NopSCADlib/commit/18f3d43780d7e083fc3b21290db2049fb4364a46 "show commit") [C.P.](# "Chris Palmer") Added convexity parameter to `clip()`.
+
+#### [v20.5.1](https://github.com/nophead/NopSCADlib/releases/tag/v20.5.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v20.5.0...v20.5.1 "diff with v20.5.0")
+*   2022-06-14 [`eda88cc`](https://github.com/nophead/NopSCADlib/commit/eda88cc8d75eb4c0cb59b368b4e2ad3db2115834 "show commit") [C.P.](# "Chris Palmer") Fixed `vero()` constructor documentation.
+Fixed missing space in veroboard vitamin description.
+
+*   2022-06-14 [`630268d`](https://github.com/nophead/NopSCADlib/commit/630268d71a0b478c28b6bde2a7c3ff9074c7a8fb "show commit") [C.P.](# "Chris Palmer") Changed `screw_knob()` facets to be suitable for 3D printing.
+Fixed `knob_height()` so it can take a screw as a type.
+
+### [v20.5.0](https://github.com/nophead/NopSCADlib/releases/tag/v20.5.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v20.4.0...v20.5.0 "diff with v20.4.0")
+*   2022-05-31 [`cc5654d`](https://github.com/nophead/NopSCADlib/commit/cc5654d7d756287f5311e35104003f38a4a94475 "show commit") [C.](# "Chris") Added `usb_miniA()`.
+
+### [v20.4.0](https://github.com/nophead/NopSCADlib/releases/tag/v20.4.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v20.3.1...v20.4.0 "diff with v20.3.1")
+*   2022-04-01 [`d46913c`](https://github.com/nophead/NopSCADlib/commit/d46913ce4f64656889fd29dccc0709d84d4d9c49 "show commit") [C.P.](# "Chris Palmer") Printed `screw_knob()` is now fully customisable by passing a parameter
+list, constructed by `screw_knob(),` in place of the screw.
+
+ * Screws can still be passed for backwards compatibility.
+
+#### [v20.3.1](https://github.com/nophead/NopSCADlib/releases/tag/v20.3.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v20.3.0...v20.3.1 "diff with v20.3.0")
+*   2022-04-01 [`b9f676a`](https://github.com/nophead/NopSCADlib/commit/b9f676a75369d666540f79abe0392e209e20d0f0 "show commit") [C.P.](# "Chris Palmer") Documented `insert_hole_length()`.
+
+### [v20.3.0](https://github.com/nophead/NopSCADlib/releases/tag/v20.3.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v20.2.0...v20.3.0 "diff with v20.2.0")
+*   2022-03-17 [`ddc4150`](https://github.com/nophead/NopSCADlib/commit/ddc4150ed73c8300bc3ef4326a91cd4ec54ed9e3 "show commit") [C.P.](# "Chris Palmer") Updated images and readme.
+
+*   2022-03-16 [`7e126c9`](https://github.com/nophead/NopSCADlib/commit/7e126c94cadd120d686eaad8459723e0c1dfc0b2 "show commit") [M.](# "Mozza") Add A23 cell
+
+### [v20.2.0](https://github.com/nophead/NopSCADlib/releases/tag/v20.2.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v20.1.2...v20.2.0 "diff with v20.1.2")
+*   2022-03-17 [`744ebc2`](https://github.com/nophead/NopSCADlib/commit/744ebc293594e2d049220bba7325f3a22f40a71a "show commit") [C.P.](# "Chris Palmer") Added functions for generating twisted cable paths and calculating its radius.
+Top row of cable bundles reversed to match a twisted cable.
+
+#### [v20.1.2](https://github.com/nophead/NopSCADlib/releases/tag/v20.1.2 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v20.1.1...v20.1.2 "diff with v20.1.1")
+*   2022-03-17 [`99a5570`](https://github.com/nophead/NopSCADlib/commit/99a5570e248be32747bead61e17feaa3bde13f9b "show commit") [C.P.](# "Chris Palmer") Fixed ziptie bug for small wires and corners made sharper.
+
+*   2022-03-17 [`b70911d`](https://github.com/nophead/NopSCADlib/commit/b70911dc132727f24798e92be06a87ab37f2917e "show commit") [C.P.](# "Chris Palmer") Image odd pixel changes due to move to summer computer.
+
+*   2022-03-01 [`2d20fb1`](https://github.com/nophead/NopSCADlib/commit/2d20fb130a260b1f7358ea9fbb9fca2b5a18a65b "show commit") [C.P.](# "Chris Palmer") Removed dead code in `spiral_paths()`.
+
+#### [v20.1.1](https://github.com/nophead/NopSCADlib/releases/tag/v20.1.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v20.1.0...v20.1.1 "diff with v20.1.0")
+*   2022-02-25 [`943deed`](https://github.com/nophead/NopSCADlib/commit/943deededfe2b258f23ca64001ae7c010ed626bc "show commit") [C.P.](# "Chris Palmer") Updated the readme.
+
+*   2022-02-24 [`c0d9067`](https://github.com/nophead/NopSCADlib/commit/c0d9067b740fc5ea4a41e696c88613a284685118 "show commit") [M.B.](# "Martin Budden") Fixed typos.
+
+*   2022-02-25 [`a30aff9`](https://github.com/nophead/NopSCADlib/commit/a30aff9613f51092bbad7052bfe1194a61557efc "show commit") [C.P.](# "Chris Palmer") Fixed missing brackets for sheets with chamfered corners.
+
+### [v20.1.0](https://github.com/nophead/NopSCADlib/releases/tag/v20.1.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v20.0.1...v20.1.0 "diff with v20.0.1")
+*   2022-02-23 [`f173284`](https://github.com/nophead/NopSCADlib/commit/f173284709acdbd32de21f0d27cb3ab10b42eb2a "show commit") [C.P.](# "Chris Palmer") Can now inhibit exploded lines for issue [#220](https://github.com/nophead/NopSCADlib/issues/220 "show issue").
+
+#### [v20.0.1](https://github.com/nophead/NopSCADlib/releases/tag/v20.0.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v20.0.0...v20.0.1 "diff with v20.0.0")
+*   2022-02-23 [`0206b2e`](https://github.com/nophead/NopSCADlib/commit/0206b2e868119b3b5fdea6111839bf5055eae438 "show commit") [C.P.](# "Chris Palmer") Updated images.
+
+*   2022-02-03 [`1ac5a6f`](https://github.com/nophead/NopSCADlib/commit/1ac5a6f6cbe518646f19c4372a2393eb2e020a18 "show commit") [M.B.](# "Martin Budden") Made hard washers slightly lighter.
+This means they can be distinguished from bolts when viewed from directly
+above.
+
+## [v20.0.0](https://github.com/nophead/NopSCADlib/releases/tag/v20.0.0 "show release") Breaking Changes [...](https://github.com/nophead/NopSCADlib/compare/v19.21.0...v20.0.0 "diff with v19.21.0")
+*   2022-02-23 [`f8d17c6`](https://github.com/nophead/NopSCADlib/commit/f8d17c6f1615b9ff9b615ad2947c4b0119bf7597 "show commit") [C.P.](# "Chris Palmer") Updated readme.
+
+*   2022-02-22 [`662db2b`](https://github.com/nophead/NopSCADlib/commit/662db2bd4103dbeb4265c148d5f7e31c98d5dae2 "show commit") [M.B.](# "Martin Budden") Improved stepper motor naming convention.
+
+### [v19.21.0](https://github.com/nophead/NopSCADlib/releases/tag/v19.21.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v19.20.0...v19.21.0 "diff with v19.20.0")
+*   2022-02-23 [`42fccc1`](https://github.com/nophead/NopSCADlib/commit/42fccc1afbf28ef6a94f0480d1306e5bc2e48e46 "show commit") [C.P.](# "Chris Palmer") Added `bezier_join()`.
+Moved `path_length()` from `sweep.scad` to `maths.scad`.
+
+### [v19.20.0](https://github.com/nophead/NopSCADlib/releases/tag/v19.20.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v19.9.1...v19.20.0 "diff with v19.9.1")
+*   2022-02-15 [`0e2778e`](https://github.com/nophead/NopSCADlib/commit/0e2778e13de2e68fc21a7b4c706aada27a17842c "show commit") [C.P.](# "Chris Palmer") Cables can now have a list of wire colours.
+Added a constructor for cables.
+
+*   2022-02-15 [`50e23e5`](https://github.com/nophead/NopSCADlib/commit/50e23e5f818077e3661e25852dc959c34e6c8b4a "show commit") [C.P.](# "Chris Palmer") Added silkscreen text to PCBs.
+
+#### [v19.9.1](https://github.com/nophead/NopSCADlib/releases/tag/v19.9.1 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v19.9.0...v19.9.1 "diff with v19.9.0")
+*   2022-02-15 [`59eeb2c`](https://github.com/nophead/NopSCADlib/commit/59eeb2c5d4c7cf9da1f219c2b01fabcf450085f3 "show commit") [C.P.](# "Chris Palmer") Trimmed the ribbon clamp tape.
+
+*   2022-02-15 [`7ea4dbe`](https://github.com/nophead/NopSCADlib/commit/7ea4dbe6cbbc23256d23f7aea87e8aac8d1000a9 "show commit") [C.P.](# "Chris Palmer") Fixed double application of `r2sides()` in `rounded_path()`.
+Added check for radius too big for corner in `rounded_path()`.
+Spiral paths can now have 0 twists.
+
 ### [v19.9.0](https://github.com/nophead/NopSCADlib/releases/tag/v19.9.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v19.8.1...v19.9.0 "diff with v19.8.1")
 *   2022-02-11 [`95b6771`](https://github.com/nophead/NopSCADlib/commit/95b6771811fd48af46b5c2d426c42c04cd8e5af3 "show commit") [C.P.](# "Chris Palmer") Added printed cable clips.
 
@@ -353,8 +474,6 @@ Fixed `M6_cs_cap_screw` and `M4_grub_screw` socket sizes.
 #### [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.
 

libtest.scad

@@ -163,14 +163,11 @@ corner_blocks_y = fixing_blocks_y + 30;
 translate([x5, corner_blocks_y])
     corner_blocks();
 
-feet_y = corner_blocks_y + 70;
-translate([x5, feet_y])
-    feet();
-
-translate([x5 + 70, feet_y])
+screw_knobs_y = corner_blocks_y + 70;
+translate([x5, screw_knobs_y])
     screw_knobs();
 
-knobs_y = feet_y + 40;
+knobs_y = screw_knobs_y + 40;
 translate([640, knobs_y])
     printed_pulley_test();
 
@@ -185,6 +182,9 @@ strap_y = clips_y + 50;
 translate([x5 + 60, strap_y])
     strap_handles();
 
+translate([x6, strap_y])
+   feet();
+
 handle_y = strap_y + 50;
 translate([x5, handle_y])
     handle();

printed/corner_block.scad

@@ -31,7 +31,7 @@
 //! 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.
+//! high lateral rigidity is not required.
 //
 include <../core.scad>
 use <../vitamins/insert.scad>

printed/knob.scad

@@ -20,7 +20,7 @@
 //
 //! 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.
+//! A knob can be constructed by specifying 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.

printed/ribbon_clamp.scad

@@ -20,7 +20,7 @@
 //
 //! 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 scalar number the slot is sized for one ribbon 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>

printed/screw_knob.scad

@@ -19,53 +19,102 @@
 
 //
 //! Knob with embedded hex head screw.
+//!
+//! Most aspects can be customised, e.g. the flange thickness and radius. It can also be solid or just a wall and be wavey edged or fluted.
 //
 include <../core.scad>
 use <../utils/hanging_hole.scad>
 
-knob_wall = 2;
+function screw_knob_screw(type)    = type[0]; //! The hex screw
+function screw_knob_wall(type)     = type[1]; //! Wall thickness
+function screw_knob_stem_h(type)   = type[2]; //! The stem height below the flange
+function screw_knob_flange_t(type) = type[3]; //! The thickness of the flange
+function screw_knob_flange_r(type) = type[4]; //! The flange outside radius
+function screw_knob_solid(type)    = type[5]; //! Is the flange solid or just a wall
+function screw_knob_waves(type)    = type[6]; //! Number of waves around the flange edge
+function screw_knob_wave_amp(type) = type[7]; //! Wave amplitude
+function screw_knob_fluted(type)   = type[8]; //! Fluted instead of sine wave
+
+function screw_knob(screw, wall = 2, stem_h = 6, flange_t = 4, flange_r = 9, solid = true, waves = 5, wave_amp = 2, fluted = false) = //! Constructor
+    [screw, wall, stem_h, flange_t, flange_r, solid, waves, wave_amp, fluted];
+
 function knob_nut_trap_depth(screw) = round_to_layer(screw_head_height(screw));
-knob_stem_h = 6;
-knob_thickness = 4;
-knob_r = 8;
-knob_wave = 1;
-knob_waves = 5;
-knob_height = knob_stem_h + knob_thickness;
-function knob_height() = knob_height;
+function knob_height(type) = //! Total height of the knob
+    let(type = !is_list(type[0]) ? screw_knob(type) : type)
+        screw_knob_stem_h(type) + screw_knob_flange_t(type);
 
-module screw_knob(screw) { //! Generate the STL for a knob to fit the specified hex screw
-    knob_stem_r = nut_trap_radius(screw_nut(screw)) + knob_wall;
+module screw_knob(type) { //! Generate the STL for a knob to fit the specified hex screw
+    type = !is_list(type[0]) ? screw_knob(type) : type;         // Allow just the screw to be specified for backwards compatibility
+    screw = screw_knob_screw(type);
+    wall = screw_knob_wall(type);
+    trap_r = nut_trap_radius(screw_nut(screw));
+    stem_r = trap_r + wall;
+    amp = screw_knob_wave_amp(type);
+    flange_r = max(screw_knob_flange_r(type), stem_r + amp);
+    flange_t = screw_knob_flange_t(type);
+    knob_h = knob_height(type);
+    waves = screw_knob_waves(type);
 
-    function wave(a) = knob_r + sin(a * knob_waves) * knob_wave;
+    function wave(a) = flange_r - amp / 2 + sin(a * waves) * amp / 2;
+    fn = r2sides(flange_r);
+    points = [for(i = [0 : fn - 1], a = i * 360 / fn) wave(a) * [sin(a), cos(a)]];
+    solid = screw_knob_solid(type);
+
+    module shape()
+        if(screw_knob_fluted(type))
+            difference() {
+                circle4n(flange_r);
+
+                c = flange_r * sin(90 / waves);            // Flute half chord
+                d = flange_r - flange_r * cos(90 / waves); // Distance from chord to perimeter
+                b = amp - d;                               // Distance from chord to flute bottom
+                flute_r = (b^2 + c^2) / b / 2;
+                for(i = [0 : waves - 1])
+                    rotate(360 * i / waves)
+                        translate([0, flange_r - amp + flute_r])
+                            circle4n(flute_r);
+            }
+        else
+            polygon(points);
 
     stl(str("screw_knob_M", screw_radius(screw) * 20))
         union() {
             render() difference() {
-                cylinder(r = knob_stem_r, h = knob_thickness + knob_stem_h);
+                cylinder(r = stem_r, h = knob_h);
 
                 hanging_hole(knob_nut_trap_depth(screw), screw_clearance_radius(screw))
                     rotate(45)
-                        circle(r = nut_trap_radius(screw_nut(screw)), $fn = 6);
+                        circle(r = trap_r, $fn = 6);
             }
-            linear_extrude(knob_thickness, convexity = 3)
-                difference() {
-                    polygon(points = [for(a = [0 : 359]) [wave(a) * sin(a), wave(a) * cos(a)]]);
+            for(i = [0 : 1])
+                linear_extrude(i ? flange_t : round_to_layer(wall), convexity = 3)
+                    difference() {
+                        shape();
 
-                    circle(knob_stem_r - eps);
-                }
+                        if(i && ! solid)
+                            offset(-wall)
+                                shape();
+
+                        circle(stem_r - eps);
+                    }
         }
 }
 
 //! Place the screw through the printed part
-module screw_knob_assembly(screw, length) //! Assembly with the screw in place
-assembly(str("screw_knob_M", 20 * screw_radius(screw), "_", length), ngb = true) {
-    translate_z(knob_height)
-        vflip()
-            stl_colour(pp1_colour) screw_knob(screw);
+module screw_knob_assembly(type, length) { //! Assembly with the screw in place
+    type = !is_list(type[0]) ? screw_knob(type) : type;
+    screw = screw_knob_screw(type);
+    knob_h = knob_height(type);
 
-    translate_z(knob_height - knob_nut_trap_depth(screw))
-        rotate(-45)
-            screw(screw, length);
+    assembly(str("screw_knob_M", 20 * screw_radius(screw), "_", length), ngb = true) {
+        translate_z(knob_h)
+            vflip()
+                stl_colour(pp1_colour) screw_knob(type);
+
+        translate_z(knob_h - knob_nut_trap_depth(screw))
+            rotate(-45)
+                screw(screw, length);
+    }
 }
 
 module screw_knob_M30_stl() screw_knob(M3_hex_screw);

readme.md

@@ -234,8 +234,9 @@ exposing enough information to make a battery box.
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|   6 | `battery_contact(bcontact, false)` |  Battery negative contact |
-|   6 | `battery_contact(bcontact, true)` |  Battery positive contact |
+|   7 | `battery_contact(bcontact, false)` |  Battery negative contact |
+|   7 | `battery_contact(bcontact, true)` |  Battery positive contact |
+|   1 | `battery(A23CELL)` |  Cell A23 12v |
 |   1 | `battery(AACELL)` |  Cell AA |
 |   1 | `battery(AAACELL)` |  Cell AAA |
 |   1 | `battery(CCELL)` |  Cell C |
@@ -1511,6 +1512,7 @@ Heatfit threaded inserts. Can be pushed into thermoplastics using a soldering ir
 | Function | Description |
 |:--- |:--- |
 | `insert_boss_radius(type, wall)` | Compute the outer radius of an insert boss |
+| `insert_hole_length(type)` | Length of the insert rounded to layer height |
 | `insert_nose_length(type, d)` | The length before the second ring. |
 
 ### Modules
@@ -2401,6 +2403,7 @@ PCBs and perfboard with optional components. The shape can be a rectangle with o
 | `usb_Ax2(cutout = false)` | Draw USB type A dual socket |
 | `usb_B(cutout = false)` | Draw USB B connector |
 | `usb_C(cutout = false)` | Draw USB C connector |
+| `usb_miniA(cutout = false)` | Draw USB mini A connector |
 | `usb_uA(cutout = false)` | Draw USB micro A connector |
 | `vero_pin(cropped = false)` | Draw a vero pin |
 
@@ -2437,12 +2440,16 @@ PCBs and perfboard with optional components. The shape can be a rectangle with o
 |   1 | `ax_res(res1_8, 1e+6, tol = 1)` |  Resistor 1e+6 Ohms 1% 0.125W |
 |   1 | `smd_led(LED0603, orange)` |  SMD LED 0603 orange |
 |   1 | `smd_led(LED0805, red)` |  SMD LED 0805 red |
+|   1 | `smd_led(LED1206, blue)` |  SMD LED 1306 blue |
 |   1 | `smd_capacitor(CAP0603)` |  SMD capacitor 0603 |
 |   1 | `smd_capacitor(CAP0805)` |  SMD capacitor 0805 |
 |   1 | `smd_capacitor(CAP1206)` |  SMD capacitor 1206 |
 |   1 | `smd_resistor(RES0603, 1K)` |  SMD resistor 0603 1K 0.1W |
 |   1 | `smd_resistor(RES0805, 1K)` |  SMD resistor 0805 1K 0.125W |
 |   1 | `smd_resistor(RES1206, 1K)` |  SMD resistor 1206 1K 0.25W |
+|   1 | `smd_soic(SOIC16)` |  SOIC16 package ICL323 |
+|   1 | `smd_soic(SOIC18)` |  SOIC18 package PIC18F88 |
+|   1 | `smd_soic(SOIC8)` |  SOIC8 package M34063 |
 |   1 | `smd_sot(SOT223)` |  SOT223 package LM117 |
 |   1 | `smd_sot(SOT23)` |  SOT23 package 2N7000 |
 |   1 | `square_button(button_4p5mm)` |  Square button 4.5mm |
@@ -2551,6 +2558,7 @@ PCBs and perfboard with optional components. The shape can be a rectangle with o
 | `usb_Ax2(cutout = false)` | Draw USB type A dual socket |
 | `usb_B(cutout = false)` | Draw USB B connector |
 | `usb_C(cutout = false)` | Draw USB C connector |
+| `usb_miniA(cutout = false)` | Draw USB mini A connector |
 | `usb_uA(cutout = false)` | Draw USB micro A connector |
 | `vero_pin(cropped = false)` | Draw a vero pin |
 
@@ -3639,6 +3647,12 @@ Surface mount components for PCBs.
 | `smd_res_end_cap(type)` | End cap width |
 | `smd_res_power(type)` | Power rating in Watts |
 | `smd_res_size(type)` | Body length, width and height |
+| `smd_soic_lead_pitch(type)` | Lead pitch |
+| `smd_soic_lead_size(type)` | Lead width, foot depth, lead thickness |
+| `smd_soic_lead_span(type)` | Total span of leads |
+| `smd_soic_lead_z(type)` | Top of lead frame from top |
+| `smd_soic_size(type)` | Body length, width and height |
+| `smd_soic_z(type)` | Height above PCB surface |
 | `smd_sot_lead_pitch(type)` | Lead pitch |
 | `smd_sot_lead_size(type)` | Lead width, foot depth, lead thickness |
 | `smd_sot_lead_span(type)` | Total span of leads |
@@ -3660,6 +3674,7 @@ Surface mount components for PCBs.
 | `smd_capacitor(type, height, value = undef)` | Draw an SMD capacitor with specified height |
 | `smd_led(type, colour, cutout)` | Draw an SMD LED with specified `colour` |
 | `smd_resistor(type, value)` | Draw an SMD resistor with specified value |
+| `smd_soic(type, value)` | Draw an SMD SOIC |
 | `smd_sot(type, value)` | Draw an SMD transistor |
 
 ![smds](tests/png/smds.png)
@@ -3669,12 +3684,16 @@ Surface mount components for PCBs.
 | ---:|:--- |:---|
 |   1 | `smd_led(LED0603, green)` |  SMD LED 0603 green |
 |   1 | `smd_led(LED0805, blue)` |  SMD LED 0805 blue |
+|   1 | `smd_led(LED1206, red)` |  SMD LED 1306 red |
 |   1 | `smd_capacitor(CAP0603)` |  SMD capacitor 0603 |
 |   1 | `smd_capacitor(CAP0805)` |  SMD capacitor 0805 |
 |   1 | `smd_capacitor(CAP1206)` |  SMD capacitor 1206 |
 |   1 | `smd_resistor(RES0603, 1R0)` |  SMD resistor 0603 1R0 0.1W |
 |   1 | `smd_resistor(RES0805, 10M)` |  SMD resistor 0805 10M 0.125W |
 |   1 | `smd_resistor(RES1206, 100K)` |  SMD resistor 1206 100K 0.25W |
+|   1 | `smd_soic(SOIC16)` |  SOIC16 package SOIC16 |
+|   1 | `smd_soic(SOIC18)` |  SOIC18 package SOIC18 |
+|   1 | `smd_soic(SOIC8)` |  SOIC8 package SOIC8 |
 |   1 | `smd_sot(SOT223)` |  SOT223 package FZT851 |
 |   1 | `smd_sot(SOT23)` |  SOT23 package 2N7000 |
 
@@ -3883,6 +3902,7 @@ NEMA stepper motor model.
 | Function | Description |
 |:--- |:--- |
 | `NEMA_big_hole(type)` | Clearance hole for the big boss |
+| `NEMA_connection_pos(type, jst_connector = false)` | Position of the wires or the connector |
 | `NEMA_holes(type)` | Screw positions for for loop |
 
 ### Modules
@@ -3900,15 +3920,15 @@ NEMA stepper motor model.
 | ---:|:--- |:---|
 |   4 | `ring_terminal(M3_ringterm)` |  Ring terminal 3mm |
 |  20 | `screw(M3_pan_screw, 8)` |  Screw M3 pan x  8mm |
-|   1 | `NEMA(NEMA14)` |  Stepper motor NEMA14 x 36mm |
-|   1 | `NEMA(NEMA16)` |  Stepper motor NEMA16 x 19.2mm |
-|   1 | `NEMA(NEMA17P)` |  Stepper motor NEMA17 x 26.5mm |
-|   1 | `NEMA(NEMA17S)` |  Stepper motor NEMA17 x 34mm |
-|   1 | `NEMA(NEMA17M)` |  Stepper motor NEMA17 x 40mm |
-|   1 | `NEMA(NEMA17)` |  Stepper motor NEMA17 x 47mm |
-|   1 | `NEMA(NEMA23)` |  Stepper motor NEMA22 x 51.2mm |
-|   1 | `NEMA(NEMA8)` |  Stepper motor NEMA8 x 30mm |
-|   1 | `NEMA(NEMA8BH)` |  Stepper motor NEMA8 x 30mm |
+|   1 | `NEMA(NEMA14_36)` |  Stepper motor NEMA14 x 36mm |
+|   1 | `NEMA(NEMA16_19)` |  Stepper motor NEMA16 x 19.2mm |
+|   1 | `NEMA(NEMA17_27)` |  Stepper motor NEMA17 x 26.5mm |
+|   1 | `NEMA(NEMA17_34)` |  Stepper motor NEMA17 x 34mm |
+|   1 | `NEMA(NEMA17_40)` |  Stepper motor NEMA17 x 40mm |
+|   1 | `NEMA(NEMA17_47)` |  Stepper motor NEMA17 x 47mm |
+|   1 | `NEMA(NEMA23_51)` |  Stepper motor NEMA22 x 51.2mm |
+|   1 | `NEMA(NEMA8_30)` |  Stepper motor NEMA8 x 30mm |
+|   1 | `NEMA(NEMA8_30BH)` |  Stepper motor NEMA8 x 30mm |
 |  16 | `washer(M3_washer)` |  Washer  M3 x 7mm x 0.5mm |
 |  20 | `star_washer(M3_washer)` |  Washer star M3 x 0.5mm |
 
@@ -4242,7 +4262,7 @@ Veroboard with mounting holes, track breaks, removed tracks, solder points and c
 ### Functions
 | Function | Description |
 |:--- |:--- |
-| `vero(name, assembly, holes, strips, pitch = inch(0.1)` | Constructor |
+| `vero(name, assembly, holes, strips, pitch = 2.54, fr4 = false, screw = M3_cap_screw, mounting_holes = [], breaks = [], no_tracks = [], components = [], joints = [])` | Constructor |
 | `vero_length(type)` | Length of the board |
 | `vero_size(type)` | Board size |
 | `vero_thickness(type)` | Thickness of the substrate |
@@ -4270,7 +4290,7 @@ Veroboard with mounting holes, track breaks, removed tracks, solder points and c
 |   4 | `nut(M3_nut, nyloc = true)` |  Nut M3 x 2.4mm nyloc |
 |   4 | `screw(M3_dome_screw, 25)` |  Screw M3 dome x 25mm |
 |   2 | `green_terminal(gt_2p54, 10)` |  Terminal block 10 way 0.1" |
-|   2 | `veroboard(z_vb)` |  Veroboard 5 holes x 22strips |
+|   2 | `veroboard(z_vb)` |  Veroboard 5 holes x 22 strips |
 |   8 | `washer(M3_washer)` |  Washer  M3 x 7mm x 0.5mm |
 
 ### Printed
@@ -4382,7 +4402,7 @@ If a washer is given a child, usually a screw or a nut, then it is placed on its
 ---
 <a name="Wire"></a>
 ## Wire
-Just a BOM entry at the moment and cable bundle size functions for holes, plus cable ties.
+Utilities for adding wires to the BOM and optionally drawing them and cable bundle size functions for holes, plus cable ties.
 
 [vitamins/wire.scad](vitamins/wire.scad) Implementation.
 
@@ -4391,21 +4411,25 @@ Just a BOM entry at the moment and cable bundle size functions for holes, plus c
 ### Functions
 | Function | Description |
 |:--- |:--- |
-| `cable(wires, size, colours, ribbon = false)` | Cable constructor |
-| `cable_bundle(cable)` | Arrangement of a bundle in a flat cable clip |
+| `cable(wires, size, colours, ribbon = false, tlen = 25)` | Cable constructor |
+| `cable_bundle(cable)` | Dimensions of the bounding rectangle of a bundle of wires in a flat cable clip |
 | `cable_bundle_positions(cable)` | Positions of wires in a bundle to go through a cable strip |
 | `cable_height(cable)` | Height in flat clip |
 | `cable_is_ribbon(cable)` | Is a ribbon cable? |
 | `cable_radius(cable)` | Radius of a bundle of wires, see <http://mathworld.wolfram.com/CirclePacking.html>. |
+| `cable_tlen(cable)` | Twisted cable twist length |
+| `cable_twisted_radius(cable)` | Approximate radius of a cable when twisted |
 | `cable_width(cable)` | Width in flat clip |
 | `cable_wire_colours(cable)` | Individual wire colours |
 | `cable_wire_size(cable)` | Size of each wire in a bundle |
 | `cable_wires(cable)` | Number of wires in a bundle |
+| `twisted_cable(cable, path, irot = 0, frot = 0)` | Return the paths for a twisted cable, `irot` is the initial rotation and frot the final rotation |
 | `wire_hole_radius(cable)` | Radius of a hole to accept a bundle of wires, rounded up to standard metric drill size |
 
 ### Modules
 | Module | Description |
 |:--- |:--- |
+| `cable(cable, paths)` | Draw a cable, given a list of paths |
 | `cable_tie(cable_r, thickness)` | A ziptie threaded around cable radius `cable_r` and through a panel with specified `thickness`. |
 | `cable_tie_holes(cable_r, h = 100)` | Holes to thread a ziptie through a panel to make a cable tie. |
 | `mouse_hole(cable, h = 100, teardrop = false)` | A mouse hole to allow a panel to go over a wire bundle. |
@@ -4417,13 +4441,13 @@ Just a BOM entry at the moment and cable bundle size functions for holes, plus c
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|   1 |  |  Wire black 7/0.2mm strands, length 90mm |
-|   1 |  |  Wire blue 7/0.2mm strands, length 90mm |
-|   1 |  |  Wire brown 7/0.2mm strands, length 90mm |
-|   1 |  |  Wire green 7/0.2mm strands, length 90mm |
-|   1 |  |  Wire orange 7/0.2mm strands, length 90mm |
-|   1 |  |  Wire red 7/0.2mm strands, length 90mm |
-|   1 |  |  Wire yellow 7/0.2mm strands, length 90mm |
+|   1 |  |  Wire black 7/0.2mm strands, length 60mm |
+|   1 |  |  Wire blue 7/0.2mm strands, length 60mm |
+|   1 |  |  Wire brown 7/0.2mm strands, length 60mm |
+|   1 |  |  Wire green 7/0.2mm strands, length 60mm |
+|   1 |  |  Wire orange 7/0.2mm strands, length 60mm |
+|   1 |  |  Wire red 7/0.2mm strands, length 60mm |
+|   1 |  |  Wire yellow 7/0.2mm strands, length 60mm |
 |   1 | `ziptie(small_ziptie)` |  Ziptie 2.5mm x 100mm min length |
 
 
@@ -4890,7 +4914,7 @@ This allows the block and one set of fasteners to be on one assembly and the oth
 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.
+high lateral rigidity is not required.
 
 [printed/corner_block.scad](printed/corner_block.scad) Implementation.
 
@@ -5449,7 +5473,7 @@ Printed handle that can be printed without needing support material due to its t
 ## Knob
 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.
+A knob can be constructed by specifying 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.
@@ -5847,7 +5871,7 @@ The stl and assembly must be given a name and parameterless wrappers for the stl
 ## Ribbon_clamp
 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 scalar number the slot is sized for one ribbon 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.
 
 [printed/ribbon_clamp.scad](printed/ribbon_clamp.scad) Implementation.
@@ -5908,15 +5932,36 @@ Clamp for ribbon cable and polypropylene strip or one or more ribbon cables.
 ## Screw_knob
 Knob with embedded hex head screw.
 
+Most aspects can be customised, e.g. the flange thickness and radius. It can also be solid or just a wall and be wavey edged or fluted.
+
 [printed/screw_knob.scad](printed/screw_knob.scad) Implementation.
 
 [tests/screw_knob.scad](tests/screw_knob.scad) Code for this example.
 
+### Properties
+| Function | Description |
+|:--- |:--- |
+| `screw_knob_flange_r(type)` | The flange outside radius |
+| `screw_knob_flange_t(type)` | The thickness of the flange |
+| `screw_knob_fluted(type)` | Fluted instead of sine wave |
+| `screw_knob_screw(type)` | The hex screw |
+| `screw_knob_solid(type)` | Is the flange solid or just a wall |
+| `screw_knob_stem_h(type)` | The stem height below the flange |
+| `screw_knob_wall(type)` | Wall thickness |
+| `screw_knob_wave_amp(type)` | Wave amplitude |
+| `screw_knob_waves(type)` | Number of waves around the flange edge |
+
+### Functions
+| Function | Description |
+|:--- |:--- |
+| `knob_height(type)` | Total height of the knob |
+| `screw_knob(screw, wall = 2, stem_h = 6, flange_t = 4, flange_r = 9, solid = true, waves = 5, wave_amp = 2, fluted = false)` | Constructor |
+
 ### Modules
 | Module | Description |
 |:--- |:--- |
-| `screw_knob(screw)` | Generate the STL for a knob to fit the specified hex screw |
-| `screw_knob_assembly(screw, length)` | Assembly with the screw in place |
+| `screw_knob(type)` | Generate the STL for a knob to fit the specified hex screw |
+| `screw_knob_assembly(type, length)` | Assembly with the screw in place |
 
 ![screw_knob](tests/png/screw_knob.png)
 
@@ -5925,18 +5970,24 @@ Knob with embedded hex head screw.
 | ---:|:--- |:---|
 |   1 | `screw(M3_hex_screw, 16)` |  Screw M3 hex x 16mm |
 |   1 | `screw(M4_hex_screw, 16)` |  Screw M4 hex x 16mm |
+|   1 | `screw(M5_hex_screw, 16)` |  Screw M5 hex x 16mm |
+|   1 | `screw(M6_hex_screw, 16)` |  Screw M6 hex x 16mm |
 
 ### Printed
 | Qty | Filename |
 | ---:|:--- |
 |   1 | screw_knob_M30.stl |
 |   1 | screw_knob_M40.stl |
+|   1 | screw_knob_M50.stl |
+|   1 | screw_knob_M60.stl |
 
 ### Assemblies
 | Qty | Name |
 | ---:|:--- |
 |   1 | screw_knob_M30_16_assembly |
 |   1 | screw_knob_M40_16_assembly |
+|   1 | screw_knob_M50_16_assembly |
+|   1 | screw_knob_M60_16_assembly |
 
 
 <a href="#top">Top</a>
@@ -6130,6 +6181,10 @@ Annotation used in this documentation
 ## Bezier
 Bezier curves and function to get and adjust the length or minimum z point.
 
+`bezier_join()` joins two paths with a Bezier curve that starts tangential to the end of `path1` and ends tangential to the end of `path2`.
+To do this the outer control points are the path ends and the inner two control points are along the tangents to the path ends.
+The only degree of freedom is how far along those tangents, which are the `d` and optional `d2` parameters.
+
 [utils/bezier.scad](utils/bezier.scad) Implementation.
 
 [tests/bezier.scad](tests/bezier.scad) Code for this example.
@@ -6140,6 +6195,7 @@ Bezier curves and function to get and adjust the length or minimum z point.
 | `adjust_bezier_length(v, l, eps = 0.001, r1 = 1.0, r2 = 1.5, l1, l2)` | Adjust Bezier control points `v` to get the required curve length `l` |
 | `adjust_bezier_z(v, z, eps = 0.001, r1 = 1, r2 = 1.5, z1, z2)` | Adjust Bezier control points `v` to get the required minimum `z` |
 | `bezier(t, v)` | Returns a point at distance `t` [0 - 1] along the curve with control points `v` |
+| `bezier_join(path1, path2, d, d2 = undef)` | Join two paths with a Bezier curve, control points are the path ends are `d` and `d2` from the ends in the same direction. |
 | `bezier_length(v, delta = 0.01, t = 0, length = 0)` | Calculate the length of a Bezier curve from control points `v` |
 | `bezier_min_z(v, steps = 100, z = inf, i = 0)` | Calculate the minimum z coordinate of a Bezier curve from control points `v` |
 | `bezier_path(v, steps = 100)` | Returns a Bezier path from control points `v` with `steps` segments |
@@ -6237,7 +6293,7 @@ allows flexible positioning of the motors.
 |   2 | `pulley(GT2x20ob_pulley)` |  Pulley GT2OB 20 teeth |
 |   8 | `screw(M3_cap_screw, 20)` |  Screw M3 cap x 20mm |
 |   4 | `screw(M3_grub_screw, 6)` |  Screw M3 grub x  6mm |
-|   2 | `NEMA(NEMA17M)` |  Stepper motor NEMA17 x 40mm |
+|   2 | `NEMA(NEMA17_40)` |  Stepper motor NEMA17 x 40mm |
 
 
 <a href="#top">Top</a>
@@ -6430,6 +6486,7 @@ Maths utilities for manipulating vectors and matrices.
 | `map(v, func)` | make a new vector where the func function argument is applied to each element of the vector v |
 | `mapi(v, func)` | make a new vector where the func function argument is applied to each element of the vector v. The func will get the index number as first argument, and the element as second argument. |
 | `nearly_zero(x)` | True if x is close to zero |
+| `path_length(path, i = 0, length = 0)` | Calculated the length along a path |
 | `quadratic_real_roots(a, b, c)` | Returns real roots of a quadratic equation, biggest first. Returns empty list if no real roots |
 | `radians(degrees)` | Convert radians to degrees |
 | `reduce(v, func, unity)` | reduce a vector v to a single entity by applying the func function recursively to the reduced value so far and the next element, starting with unity as the initial reduced value |
@@ -6567,6 +6624,8 @@ Because the tangents need to be calculated to find the length these can be calcu
 | Function | Description |
 |:--- |:--- |
 | `circle_tangent(p1, p2)` | Compute the clockwise tangent between two circles represented as [x,y,r] |
+| `line_intersection(l0, l1)` | Return the point where two 2D lines intersect or undef if they don't. |
+| `offset(points, offset)` | Offset a 2D polygon, breaks for concave shapes and negative offsets if the offset is more than half the smallest feature size. |
 | `rounded_polygon(points, _tangents = undef)` | Return the rounded polygon from the point list, can pass the tangent list to save it being calculated |
 | `rounded_polygon_arcs(points, tangents)` | Compute the arcs at the points, for each point [angle, rotate_angle, length] |
 | `rounded_polygon_length(points, tangents)` | Calculate the length given the point list and the list of tangents computed by `rounded_polygon_tangents` |
@@ -6650,13 +6709,12 @@ Each vertex, apart from the first and the last, has an associated radius and the
 | `cap(facets, segment = 0, end)` | Create the mesh for an end cap |
 | `circle_points(r = 1, z = 0, dir = -1)` | Generate the points of a circle, setting z makes a single turn spiral |
 | `helical_twist_per_segment(r, pitch, sides)` | Calculate the twist around Z that rotate_from_to() introduces |
-| `path_length(path, i = 0, length = 0)` | Calculated the length along a path |
 | `rectangle_points(w, h)` | Generate the points of a rectangle |
 | `rounded_path(path)` | Convert a rounded_path, consisting of a start coordinate, vertex / radius pairs and then an end coordinate, to a path of points for sweep. |
 | `rounded_path_vertices(path)` | Show the unrounded version of a rounded_path for debug |
 | `segmented_path(path, min_segment)` | Add points to a path to enforce a minimum segment length |
 | `skin_faces(points, npoints, facets, loop, offset = 0)` | Create the mesh for the swept volume without end caps |
-| `spiral_paths(path, n, r, twists, start_angle)` | Create a new paths which sprial around the given path. Use for making twisted cables |
+| `spiral_paths(path, n, r, twists, start_angle)` | Create a new paths which spiral around the given path. Use for making twisted cables |
 | `sweep(path, profile, loop = false, twist = 0)` | Generate the point list and face list of the swept volume |
 
 ### Modules
@@ -6782,7 +6840,7 @@ The `pose()` module allows assembly views in the readme to be posed differently
 |:--- |:--- |
 | `assembly(name, big = undef, ngb = false)` | Name an assembly that will appear on the BOM, there needs to a module named `<name>_assembly` to make it. `big` can force big or small assembly diagrams. |
 | `dxf(name)` | Name a dxf that will appear on the BOM, there needs to a module named `<name>_dxf` to make it |
-| `explode(d, explode_children = false, offset = [0,0,0])` | Explode children by specified Z distance or vector `d`, option to explode grand children |
+| `explode(d, explode_children = false, offset = [0,0,0], show_line = true)` | Explode children by specified Z distance or vector `d`, option to explode grand children |
 | `hidden()` | Make item invisible, except on the BOM |
 | `no_explode()` | Prevent children being exploded |
 | `no_pose()` | Force children not to be posed even if parent is |
@@ -6802,7 +6860,7 @@ The `pose()` module allows assembly views in the readme to be posed differently
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
 |   1 | `insert(F1BM3)` |  Heatfit insert M3 |
-|   1 | `widget(3)` |  Rivit like thing for 3mm sheets |
+|   1 | `widget(3)` |  Rivet like thing for 3mm sheets |
 |   1 | `screw(M3_cap_screw, 8)` |  Screw M3 cap x  8mm |
 |   1 | `sheet(PMMA3, 20, 20, 1)` |  Sheet acrylic 20mm x 20mm x 3mm |
 |   1 | `washer(M3_washer)` |  Washer  M3 x 7mm x 0.5mm |
@@ -6843,7 +6901,7 @@ Original version by Doug Moen on the OpenSCAD forum
 | Module | Description |
 |:--- |:--- |
 | `box(xmin, ymin, zmin, xmax, ymax, zmax)` | Construct a box given its bounds |
-| `clip(xmin = -inf, ymin = -inf, zmin = -inf, xmax = inf, ymax = inf, zmax = inf)` | Clip child to specified boundaries |
+| `clip(xmin = -inf, ymin = -inf, zmin = -inf, xmax = inf, ymax = inf, zmax = inf, convexity = 1)` | Clip child to specified boundaries |
 
 ![clip](tests/png/clip.png)
 

scripts/changelog.py

@@ -157,11 +157,11 @@ if __name__ == '__main__':
                         break
                     j += 1
 
-                # Print verson info
+                # Print version info
                 print('%s [%s](%s "show release") %s %s' % ('#' * (level + 1), ver, url + '/releases/tag/' + ver, type, diff), file = file)
 
             # 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 chang.*log.*', c.comment):
+            if not c.comment.startswith('Merge branch') and not c.comment.startswith('Merge pull') and not re.match(r'U..ated ch.*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/render.py

@@ -26,7 +26,7 @@ from set_config import *
 from exports import bom_to_parts
 import os
 import openscad
-from tests import do_cmd, update_image, colour_scheme, background
+from tests import do_cmd, update_image, colour_scheme, background, image_size
 from deps import mtime
 from colorama import init
 import json
@@ -95,7 +95,7 @@ def render(target, type):
             render = "--preview" if type == 'stl' or colour != pp1 else "--render"
             tmp_name = tmp_dir + '/' + part[:-4] + '.png'
             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)
+            openscad.run("-o", tmp_name, png_maker_name, colour_scheme, "--projection=p", image_size, 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)

scripts/set_config.py

@@ -57,13 +57,13 @@ def set_config(target, usage = None):
         sys.exit(1)
 
     if not targets:
-        print("Not a muli-configuration project (no config_<target>.scad files found)")
+        print("Not a multi-configuration project (no config_<target>.scad files found)")
         if usage:
             usage()
         sys.exit(1)
 
     if not target in targets:
-        print(target + " is not a configuration, avaliable configurations are: " + valid_targets_string())
+        print(target + " is not a configuration, available configurations are: " + valid_targets_string())
         if usage:
             usage()
         sys.exit(1)

scripts/tests.py

@@ -36,8 +36,7 @@ from blurb import *
 from colorama import Fore
 from tmpdir import *
 
-w = 4096
-h = w
+image_size = "--imgsize=4096,4096"
 threshold = 20  # Image comparison allowed number of different pixels
 fuzz = 5       # Image comparison allowed percentage error in pixel value
 
@@ -48,7 +47,12 @@ def do_cmd(cmd, output = sys.stdout):
     for arg in cmd:
         print(arg, end = " ")
     print()
-    return subprocess.call(cmd, stdout = output, stderr = output)
+    t = time.time()
+    rv = subprocess.call(cmd, stdout = output, stderr = output)
+    elapsed = time.time() - t
+    with open("cmd_times.txt", 'at') as f:
+        print(cmd[0], cmd[-1], elapsed, file = f)
+    return rv
 
 def compare_images(a, b, c):
     if not os.path.isfile(b):
@@ -119,7 +123,7 @@ def tests(tests):
         libtest = True
         lib_blurb = scrape_blurb(scad_name)
         if not os.path.isfile(png_name):
-            openscad.run(scad_name, "-o", png_name, colour_scheme, "--projection=p", "--imgsize=%d,%d" % (w, h), "--camera=0,0,0,50,0,340,500", "--autocenter", "--viewall");
+            openscad.run(scad_name, "-o", png_name, colour_scheme, "--projection=p", image_size, "--camera=0,0,0,50,0,340,500", "--autocenter", "--viewall");
             do_cmd(["magick", png_name, "-trim", "-resize", "1280", "-bordercolor", background, "-border", "10", png_name])
     else:
         #
@@ -240,7 +244,7 @@ def tests(tests):
                 print(changed)
                 t = time.time()
                 tmp_name = tmp_dir + '/tmp.png'
-                openscad.run_list([scad_name, "-o", tmp_name] + options.list() + ["-D$bom=2", colour_scheme, "--projection=p", "--imgsize=%d,%d" % (w, h), "--camera=0,0,0,70,0,315,500", "--autocenter", "--viewall", "-d", dname]);
+                openscad.run_list([scad_name, "-o", tmp_name] + options.list() + ["-D$bom=2", colour_scheme, "--projection=p", image_size, "--camera=0,0,0,70,0,315,500", "--autocenter", "--viewall", "-d", dname]);
                 times.add_time(scad_name, t)
                 do_cmd(["magick", tmp_name, "-trim", "-resize", "1000x600", "-bordercolor", background, "-border", "10", tmp_name])
                 update_image(tmp_name, png_name)

scripts/views.py

@@ -25,7 +25,7 @@
 from __future__ import print_function
 from set_config import *
 import openscad
-from tests import do_cmd, update_image, colour_scheme, background
+from tests import do_cmd, update_image, colour_scheme, background, image_size
 import time
 import times
 import options
@@ -223,7 +223,7 @@ def views(target, do_assemblies = None):
                                                 target_def = ['-D$target="%s"' % target] if target else []
                                                 cwd_def = ['-D$cwd="%s"' % os.getcwd().replace('\\', '/')]
                                                 view_def = ['--viewall', '--autocenter'] if not (zoomed & (1 << explode)) else ['--camera=0,0,0,55,0,25,140']
-                                                openscad.run_list(["-o", tmp_name, png_maker_name] + options.list() + target_def + cwd_def + view_def + ["-D$pose=1", "-D$explode=%d" % explode, colour_scheme, "--projection=p", "--imgsize=4096,4096", "-d", dname]);
+                                                openscad.run_list(["-o", tmp_name, png_maker_name] + options.list() + target_def + cwd_def + view_def + ["-D$pose=1", "-D$explode=%d" % explode, colour_scheme, "--projection=p", image_size, "-d", dname]);
                                                 times.add_time(png_name, t)
                                                 do_cmd(["magick", tmp_name, "-trim", "-resize", "1004x1004", "-bordercolor", background, "-border", "10", tmp_name])
                                                 update_image(tmp_name, png_name)
@@ -422,7 +422,7 @@ def views(target, do_assemblies = None):
     times.add_time(html_name, t)
     times.print_times(pngs + [html_name])
     #
-    # Make the printme.html by replacing empty spans that invisbly mark the page breaks by page break divs.
+    # Make the printme.html by replacing empty spans that invisibly mark the page breaks by page break divs.
     #
     with open(html_name, 'rt') as src:
         lines = src.readlines()

tests/BOM.scad

@@ -32,7 +32,7 @@ height = 10;
 insert = screw_insert(screw);
 
 module widget(thickness) {
-    vitamin(str("widget(", thickness, "): Rivit like thing for ", thickness, "mm sheets"));
+    vitamin(str("widget(", thickness, "): Rivet like thing for ", thickness, "mm sheets"));
     t = 1;
     color("silver") {
         cylinder(d = 3, h = thickness + 2 * eps, center = true);
@@ -85,7 +85,7 @@ assembly("widget_top") {
 module widget_assembly()
 assembly("widget") {
 
-    widget_base_assembly();                 // Note this is not exloded because it is sub-assembly
+    widget_base_assembly();                 // Note this is not exploded because it is sub-assembly
 
     translate_z(height) {
         translate_z(sheet_thickness(sheet))

tests/PCB.scad

@@ -61,6 +61,7 @@ test_pcb = ["test_pcb", "Test PCB",
     [
         [ 20, -5,  180, "trimpot10"],
         [ 20, -15,  90, "trimpot10", true],
+        [  7,  2,   90, "smd_led", LED1206, "blue"],
         [ 10,  2,   90, "smd_led", LED0805, "red"],
         [ 13,  2,   90, "smd_led", LED0603, "orange"],
         [ 16,  2,   90, "smd_res", RES1206, "1K"],
@@ -85,16 +86,18 @@ test_pcb = ["test_pcb", "Test PCB",
         [  8, 105, 180, "usb_Ax2"],
         [  7,  85, 180, "molex_usb_Ax1"],
         [ 8.5,125, 180, "molex_usb_Ax2"],
-        [  3, 140, 180, "usb_uA"],
-        [  8, 155, 180, "usb_B"],
+        [  3, 138, 180, "usb_uA"],
+        [ 4.6,148, 180, "usb_miniA"],
+        [ 3.7,158, 180, "usb_C"],
+        [  8, 170, 180, "usb_B"],
+        [  6, 184, 180, "uSD", [12, 11.5, 1.4]],
+        [  8, 196, 180, "jack"],
+        [  6, 206, 180, "barrel_jack"],
+        [  5, 220, 180, "hdmi"],
+        [  3, 235, 180, "mini_hdmi"],
+        [ 38, 190, -90, "text", 25, 4, "Silkscreen", "Liberation Sans:style=Bold"],
         [ 25, 200,   0, "buzzer", 4.5, 8.5],
         [ 25, 218,   0, "buzzer"],
-        [ 38, 190, -90, "text", 25, 4, "Silkscreen", "Liberation Sans:style=Bold"],
-        [  8, 190, 180, "jack"],
-        [  6, 200, 180, "barrel_jack"],
-        [  5, 218, 180, "hdmi"],
-        [  3, 235, 180, "mini_hdmi"],
-        [  6, 175, 180, "uSD", [12, 11.5, 1.4]],
 
         [ 65,   9,   0, "link", inch(0.4)],
         [ 65,  12,   0, "ax_res", res1_8, 1000],
@@ -112,7 +115,6 @@ test_pcb = ["test_pcb", "Test PCB",
         [ 60,   3,   0, "flex"],
         [ 50,  15, -90, "flat_flex"],
         [ 40,  15, -90, "flat_flex", true],
-        [ 60,  35,   0, "D_plug", DCONN9],
 
         [ 50,  50,   0, "molex_hdr", 2],
         [ 50,  60,   0, "jst_xh", 2],
@@ -137,8 +139,11 @@ test_pcb = ["test_pcb", "Test PCB",
         [ 55, 170,   0, "button_4p5mm"],
         [ 50, 185,   0, "microswitch", small_microswitch],
         [ 52, 200,   0, "pcb", 11, TMC2130 ],
-        [ 80, 200,   0, "pdip", 24, "27C32", true, inch(0.6) ],
-        [ 80, 170,   0, "pdip", 8, "NE555" ],
+        [ 80, 210,   0, "pdip", 24, "27C32", true, inch(0.6) ],
+        [ 80, 180,   0, "pdip", 8, "NE555" ],
+        [ 80, 166, -90, "smd_soic", SOIC18, "PIC18F88"],
+        [ 71, 166, -90, "smd_soic", SOIC16, "ICL323"],
+        [ 64, 166, -90, "smd_soic", SOIC8, "M34063"],
         [ 80, 150,   0, "chip", 10, 5, 1, grey(20)],
 
         [ 52, 206,   0, "2p54socket", 8, 1 ],
@@ -146,7 +151,8 @@ test_pcb = ["test_pcb", "Test PCB",
         [ 50, 220,   0, "standoff",  5, 4.5, 12.5, 2.54],
         [ 50, 240,   0, "potentiometer"],
         [ 75, 240,   0, "potentiometer", KY_040_encoder, 8],
-        [ 30,  85,   -90, "7seg", WT5011BSR, 2],
+        [ 30,  85, -90, "7seg", WT5011BSR, 2],
+        [ 30, 55, -90, "D_plug", DCONN9],
     ],
     // accessories
     []

tests/SMDs.scad

@@ -38,6 +38,12 @@ module smds() {
         layout([for(s = smd_sots) smd_sot_size(s).x], 1)
             let(s = smd_sots[$i])
                 smd_sot(s, ["2N7000", "FZT851"][$i]);
+
+    translate([0, 20])
+        layout([for(s = smd_soics) smd_soic_size(s).x], 1)
+            let(s = smd_soics[$i])
+                smd_soic(s, s[0]);
+
 }
 
 if($preview)

tests/bezier.scad

@@ -77,6 +77,17 @@ module beziers() {
 
     translate(control_points[1] - [0, 0, 2])
         label(str("bezier_length = ", length, ", bezier_min_z = ", bezier_min_z(curve)), valign = "top");
+
+    path1 = [[20, 20,  0], [40, 20, 0]];
+    path2 = [[70, 40, -5], [60, 40, 0]];
+
+    color("green")
+        for(p = concat(path1, path2))
+            translate(p)
+                sphere(1);
+
+    color("orange")
+        sweep(bezier_join(path1, path2, 10), circle_points(0.5, $fn = 64));
 }
 
 if($preview)

tests/core_xy.scad

@@ -55,7 +55,7 @@ module coreXY_belts_test() {
     translate([coreXYPosBL.x + separation.x/2, coreXYPosTR.y + upper_drive_pulley_offset.y, separation.z/2]) {
         // add the upper drive pulley stepper motor
         translate([coreXY_drive_pulley_x_alignment(coreXY_type) + upper_drive_pulley_offset.x, 0, -pulley_height(coreXY_drive_pulley(coreXY_type))])
-            NEMA(NEMA17M);
+            NEMA(NEMA17_40);
 
         // add the screws for the upper drive offset idler pulleys if required
         if (upper_drive_pulley_offset.x > 0) {
@@ -78,7 +78,7 @@ module coreXY_belts_test() {
     translate([coreXYPosTR.x - separation.x/2, coreXYPosTR.y + lower_drive_pulley_offset.y, -separation.z/2]) {
         // add the lower drive pulley stepper motor
         translate([-coreXY_drive_pulley_x_alignment(coreXY_type) + lower_drive_pulley_offset.x, 0, -pulley_height(coreXY_drive_pulley(coreXY_type))])
-            NEMA(NEMA17M);
+            NEMA(NEMA17_40);
 
         // add the screws for the lower drive offset idler pulleys if required
         if (lower_drive_pulley_offset.x < 0) {

tests/screw_knob.scad

@@ -17,20 +17,26 @@
 // If not, see <https://www.gnu.org/licenses/>.
 //
 include <../core.scad>
+use <../utils/layout.scad>
 
 use <../printed/screw_knob.scad>
 
-screws = [M3_hex_screw, M4_hex_screw];
+knobs = [
+    M3_hex_screw,
+    M4_hex_screw,
+    screw_knob(M5_hex_screw, flange_r = 12, flange_t = 6, stem_h = 2, waves = 6),
+    screw_knob(M6_hex_screw, flange_r = 15, flange_t = 6, solid = false, stem_h = 2, waves = 6, wall = 1.6, fluted = true),
+];
 
-module do_screw_knob(screw)
+module do_screw_knob(knob) {
     if($preview)
-        screw_knob_assembly(screw, 16);
+        screw_knob_assembly(knob, 16);
     else
-        screw_knob(screw);
+        screw_knob(knob);
+}
 
 module screw_knobs()
-    for(i = [0 : len(screws) - 1])
-        translate([i * 30, 0])
-            do_screw_knob(screws[i]);
+    layout([for(k = knobs) 2 * screw_knob_flange_r(k)], 10)
+        do_screw_knob(knobs[$i]);
 
 screw_knobs();

tests/stepper_motors.scad

@@ -16,18 +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/>.
 //
+show_connection_pos = false;
+
+/* [Hidden] */
 include <../core.scad>
 include <../vitamins/stepper_motors.scad>
 
 use <../utils/layout.scad>
 
+has_connector = [NEMA17_27, NEMA17_40, NEMA17_40L280, NEMA8_30, NEMA8_30BH];
+
 module stepper_motors()
     layout([for(s = stepper_motors) NEMA_width(s)], 5, no_offset = false) let(m = stepper_motors[$i]) {
-        rotate(180)
-            NEMA(m, 0, in([NEMA17P, NEMA17M, NEMA17M8, NEMA8, NEMA8BH], m));
+        rotate(180) {
+            NEMA(m, 0, in(has_connector, m) ? true : show_connection_pos ? undef : false);
 
-        translate_z(4)
-            NEMA_screws(m, M3_pan_screw, n = $i - 2, earth = $i > 6 ? undef : $i - 3);
+            if(show_connection_pos)
+                translate(NEMA_connection_pos(m, in(has_connector, m)))
+                    sphere();
+
+            translate_z(4)
+                NEMA_screws(m, M3_pan_screw, n = $i - 2, earth = $i > 6 ? undef : $i - 3);
+        }
     }
 
 if($preview)

tests/wire.scad

@@ -17,18 +17,25 @@
 // If not, see <https://www.gnu.org/licenses/>.
 //
 include <../utils/core/core.scad>
+use <../utils/sweep.scad>
+use <../utils/bezier.scad>
 
 use <../vitamins/wire.scad>
 
-bundle = [7, 1.4];
+twist_len = 25; // [5 : 50]
+wires = 7; // [1 : 7]
+irot = -60; // [-90 : 0]
 
+/* [Hidden] */
+wire_d = 1.4;
+bundle = cable(wires, wire_d);
 bundle_r = cable_radius(bundle);
 
 thickness = 2;
 w = 60;
 d = 20;
-h = 40;
-wire_l = 90;
+h = 10;
+wire_l = 60;
 mouse_y = 10;
 cable_pitch = 7;
 
@@ -49,6 +56,7 @@ module wires() {
                     translate([bundle_r - d / 2, 0]) {
                         colour = ["black", "brown", "red", "orange", "yellow", "blue", "purple"][i];
                         wire(colour, 7, wire_l);
+
                         color(colour)
                             cylinder(d = d, h = wire_l, center = true);
                    }
@@ -66,7 +74,7 @@ module wires() {
                         mouse_hole(bundle, 0, true);
 
                     for(i = [1 : 6])
-                        let(cable = [i, 1.4], bundle = cable_bundle(cable))
+                        let(cable = cable(i, wire_d), bundle = cable_bundle(cable))
                             translate([mouse_y + cable_pitch * i - bundle.x / 2, -eps])
                                 square([bundle.x, bundle.y]);
                 }
@@ -81,18 +89,28 @@ module wires() {
                         cable_tie_holes(bundle_r, 0);
                 }
     }
+
     translate([-15, mouse_y])
         cable_tie(bundle_r, thickness);
 
-    for(i = [1 : 6]) let(cable = [i, 1.4])
-        translate([0, mouse_y + cable_pitch * i])
-            let(positions = cable_bundle_positions(cable))
-                for(i = [0 : len(positions) - 1])
-                    let(p = positions[i])
-                        translate([0, p.x, p.y])
-                            rotate([0, 90, 0])
-                                color([grey(10), "blue", "red", "orange", "yellow", "green"][i])
-                                    cylinder(d = cable_wire_size(cable), h = 60, center = true);
+    for(i = [1 : 6]) let(cable = cable(i, wire_d, [grey(10), "blue", "red", "orange", "yellow", "green"], tlen = twist_len))
+        translate([0, mouse_y + cable_pitch * i]) {
+            tr = cable_twisted_radius(cable);
+            bend_r = 5;
+            x = -d + thickness - bend_r;
+            path = [
+                        [-5, 0, tr],
+                        [x,  0, tr],
+                bend_r, [x,  0, -25]
+            ];
+            rpath = rounded_path(path);
+            tpaths = twisted_cable(cable, rpath, irot = irot, frot = -irot);
+            positions = cable_bundle_positions(cable);
+
+            ends = [for(p = positions) [[30, p.x, p.y], [0, p.x, p.y]]];
+            paths = [for(i = [0 : len(tpaths) - 1]) bezier_join(ends[i], tpaths[i], 1.3, 3)];
+            cable(cable, paths, $fn = 32);
+        }
 }
 
 if($preview)

tests/zipties.scad

@@ -16,14 +16,23 @@
 // You should have received a copy of the GNU General Public License along with NopSCADlib.
 // If not, see <https://www.gnu.org/licenses/>.
 //
+wire_r = 5; // [1 : 20]
+t = 0; // [0 : 3]
+
 include <../utils/core/core.scad>
 use <../utils/layout.scad>
 
 include <../vitamins/zipties.scad>
 
 module zipties()
-    layout([for(z = zipties) 9], 10)
-        ziptie(zipties[$i], 5);
+    layout([for(z = zipties) 9], 2 * wire_r) {
+        ziptie(zipties[$i], wire_r, t);
+
+        if(t)
+            color(grey(20))
+                cylinder(r = wire_r, h = 10, center = true);
+
+    }
 
 if($preview)
     zipties();

utils/bezier.scad

@@ -19,8 +19,13 @@
 
 //
 //! Bezier curves and function to get and adjust the length or minimum z point.
+//!
+//! `bezier_join()` joins two paths with a Bezier curve that starts tangential to the end of `path1` and ends tangential to the end of `path2`.
+//! To do this the outer control points are the path ends and the inner two control points are along the tangents to the path ends.
+//! The only degree of freedom is how far along those tangents, which are the `d` and optional `d2` parameters.
 //
 include <../global_defs.scad>
+include <maths.scad>
 
 function bezier(t, v) = //! Returns a point at distance `t` [0 - 1] along the curve with control points `v`
     (len(v) > 2) ? bezier(t, [for (i = [0 : len(v) - 2]) v[i] * (1 - t) + v[i + 1] * (t)])
@@ -55,3 +60,16 @@ function adjust_bezier_z(v, z, eps = 0.001, r1 = 1, r2 = 1.5, z1, z2) = //! Adju
                            : let(r = r1 + (z - z1) * (r2 - r1) / (z2 - z1))
                                  abs(r - r1) < abs(r - r2) ? adjust_bezier_z(v, z, eps, r, r1, undef, z1)
                                                            : adjust_bezier_z(v, z, eps, r, r2, undef, z2);
+
+function bezier_join(path1, path2, d, d2 = undef) = let( //! Join two paths with a Bezier curve, control points are the path ends are `d` and `d2` from the ends in the same direction.
+        d2 = is_undef(d2) ? d : d2,
+        l = len(path1),
+        p0 = path1[l - 1],
+        p1 = p0 + unit(p0 - path1[l - 2]) * d,
+        p3 = path2[0],
+        p2 = p3 + unit(path2[0] - path2[1]) * d2,
+        v = [p0, p1, p2, p3],
+        segs = path_length(v) / $fs,
+        path = [for(i = [1 : segs - 1], t = i / segs) bezier(t, v)],
+        len = len(path)
+    ) concat(path1, path, path2);

utils/core/bom.scad

@@ -49,17 +49,18 @@ function show_supports() = !$preview || exploded();                 //! True if
 module no_explode()                                                 //! Prevent children being exploded
     let($exploded_parent = true) children();
 
-module explode(d, explode_children = false, offset = [0,0,0]) {     //! Explode children by specified Z distance or vector `d`, option to explode grand children
+module explode(d, explode_children = false, offset = [0,0,0], show_line = true) {     //! Explode children by specified Z distance or vector `d`, option to explode grand children
     v = is_list(d) ? d : [0, 0, d];
     o = is_list(offset) ? offset : [0, 0, offset];
     if(exploded() && norm(v)) {
-        translate(o)                                                // Draw the line first in case the child is transparent
-            color("yellow") hull() {
-                sphere(0.2);
-
-                translate(v * exploded())
+        if(show_line)
+            translate(o)                                                // Draw the line first in case the child is transparent
+                color("yellow") hull() {
                     sphere(0.2);
-            }
+
+                    translate(v * exploded())
+                        sphere(0.2);
+                }
 
         translate(v * exploded())
             let($exploded_parent = explode_children ? undef : true)

utils/core/clip.scad

@@ -41,8 +41,8 @@ module box(xmin, ymin, zmin, xmax, ymax, zmax) //! Construct a box given its bou
          [0,2,3,1]]  // left
     );
 
-module clip(xmin = -inf, ymin = -inf, zmin = -inf, xmax = inf, ymax = inf, zmax = inf) //! Clip child to specified boundaries
-    render() intersection() {
+module clip(xmin = -inf, ymin = -inf, zmin = -inf, xmax = inf, ymax = inf, zmax = inf, convexity = 1) //! Clip child to specified boundaries
+    render(convexity = convexity) intersection() {
         children();
 
         box(xmin, ymin, zmin, xmax, ymax, zmax);

utils/maths.scad

@@ -187,3 +187,7 @@ function cubic_real_roots(a, b, c, d) = //! Returns real roots of cubic equation
     ) roots == 1 ? [x] :
       roots == 2 ? [3 * q /p + inflection, -3 * q / p / 2 + inflection] :
       [for(i = [0 : roots - 1]) 2 * sqrt(-p / 3) * cos(acos(3 * q * sqrt(-3 / p) / p / 2) - i * 120) + inflection];
+
+function path_length(path, i = 0, length = 0) = //! Calculated the length along a path
+    i >= len(path) - 1 ? length
+                       : path_length(path, i + 1, length + norm(path[i + 1] - path[i]));

utils/rounded_polygon.scad

@@ -33,7 +33,7 @@ function circle_tangent(p1, p2) = //! Compute the clockwise tangent between two
         dx = p2.x - p1.x,
         dy = p2.y - p1.y,
         d = sqrt(dx * dx + dy * dy),
-        theta = atan2(dy, dx) + acos((r1 - r2) / d),
+        theta = assert(d, str("points conicident ", p1)) atan2(dy, dx) + acos((r1 - r2) / d),
         v = [cos(theta), sin(theta)]
     )[ p1 + r1 * v, p2 + r2 * v ];
 
@@ -72,24 +72,52 @@ function rounded_polygon_length(points, tangents) = //! Calculate the length giv
         arcs = rounded_polygon_arcs(points, tangents)
     ) sumv( map( concat(tangents, arcs), function(e) e[2] ) );
 
+function line_intersection(l0, l1) = //! Return the point where two 2D lines intersect or undef if they don't.
+    assert(Len(l0) == 2 && Len(l1) == 2, "Two 2D vectors expected")
+    let(
+        p0 = l0[0], p1 = l0[1], p2 = l1[0], p3 = l1[1],
+        v1 = p1 - p0,
+        v2 = p3 - p2,
+        v3 = p0 - p2,
+        det = v1.x * v2.y - v2.x * v1.y,
+        s = det ? (-v1.y * v3.x + v1.x * v3.y) / det : inf,
+        t = det ? ( v2.x * v3.y - v2.y * v3.x) / det : inf
+    ) s >= 0 && s <= 1 && t >= 0 && t <= 1 ? p0 + t * v1 : undef;
+
 function rounded_polygon(points, _tangents = undef) = //! Return the rounded polygon from the point list, can pass the tangent list to save it being calculated
     let(
         len = len(points),
         tangents = _tangents ? _tangents : rounded_polygon_tangents(points),
         arcs = rounded_polygon_arcs(points, tangents)
-    ) [for(i = [0 : len - 1], last = (i - 1 + len) % len, R = points[i][2]) each [
-        vec2(tangents[last][1]),                        // End of last tangent
-        if(R)                                               // If rounded
-            let(r = abs(R),                                     // Get radius
-                n = r2sides4n(r),                               // Decide number of vertices
-                step = 360 / n,                                 // Angular step
-                arc = arcs[i],                                  // Get corner arc details
-                start = ceil(arc[1] / step + eps),              // Starting index
-                end = floor((arc[0] + arc[1]) / step - eps),    // Ending index
-                c = vec2(points[i])                             // Centre of arc
-            ) for(j = R > 0 ? [end : -1 : start] : [start : 1 : end], a = j * step) c + r * [cos(a), sin(a)], // Points on the arc
-        vec2(tangents[i][0])]                           // Start of next tangent
+    ) [for(i = [0 : len - 1], last = (i - 1 + len) % len)
+        let(
+            t0 = vec2(tangents[last]),
+            t1 = vec2(tangents[i]),
+            p = line_intersection(t0, t1),                              // Do the tangents cross?
+            R = points[i][2]
+        )
+        if(!is_undef(p))                                                // Tangents intersect, so just add the intersection point
+            p
+        else
+            each [                                                      // Else link the two tangent ends with an arc
+                t0[1],                                                  // End of last tangent
+                if(R)                                                   // If rounded
+                    let(r = abs(R),                                     // Get radius
+                        n = r2sides4n(r),                               // Decide number of vertices
+                        step = 360 / n,                                 // Angular step
+                        arc = arcs[i],                                  // Get corner arc details
+                        start = ceil(arc[1] / step + eps),              // Starting index
+                        end = floor((arc[0] + arc[1]) / step - eps),    // Ending index
+                        c = vec2(points[i])                             // Centre of arc
+                    ) for(j = R > 0 ? [end : -1 : start] : [start : 1 : end], a = j * step)
+                        c + r * [cos(a), sin(a)],                       // Points on the arc
+                if(R)
+                    t1[0],                                              // Start of next tangent
+            ]
        ];
 
+function offset(points, offset) =                                       //! Offset a 2D polygon, breaks for concave shapes and negative offsets if the offset is more than half the smallest feature size.
+    rounded_polygon([for(p = points) [p.x, p.y, offset]]);
+
 module rounded_polygon(points, _tangents = undef) //! Draw the rounded polygon from the point list, can pass the tangent list to save it being calculated
     polygon(rounded_polygon(points, _tangents), convexity = len(points));

utils/sweep.scad

@@ -127,8 +127,8 @@ function sweep_transforms(path, loop = false, twist = 0) =
                          i = i + 1,
                          rot = i < len ? rotate_from_to(tangents[i - 1], tangents[i]) * rot : undef) rot],
 
-        missmatch = loop ? calculate_twist(rotations[0], rotations[last]) : 0,
-        rotation = missmatch + twist
+        mismatch = loop ? calculate_twist(rotations[0], rotations[last]) : 0,
+        rotation = mismatch + twist
     )
     [for(i = [0 : last])
         let(za = rotation * lengths[i] / length)
@@ -177,10 +177,6 @@ module sweep(path, profile, loop = false, twist = 0, convexity = 1) { //! Draw a
     polyhedron(points = mesh[0], faces = mesh[1], convexity = convexity);
 }
 
-function path_length(path, i = 0, length = 0) = //! Calculated the length along a path
-    i >= len(path) - 1 ? length
-                       : path_length(path, i + 1, length + norm(path[i + 1] - path[i]));
-
 function circle_points(r = 1, z = 0, dir = -1) = //! Generate the points of a circle, setting z makes a single turn spiral
     let(sides = r2sides(r))
         [for(i = [0 : sides - 1]) let(a = dir * i * 360 / sides) [r * cos(a), r * sin(a), z * i / sides]];
@@ -243,10 +239,9 @@ function segmented_path(path, min_segment) = [  //! Add points to a path to enfo
             path[len(path) - 1]
 ];
 
-function spiral_paths(path, n, r, twists, start_angle) = let( //! Create a new paths which sprial around the given path. Use for making twisted cables
+function spiral_paths(path, n, r, twists, start_angle) = let( //! Create a new paths which spiral around the given path. Use for making twisted cables
         segment = twists ? path_length(path) / twists / r2sides(2 * r) : inf,
-        transforms = sweep_transforms(segmented_path(path, segment), twist = 360 * twists),
-        initial = [r, 0, 0, 1] * rotate(start_angle)
+        transforms = sweep_transforms(segmented_path(path, segment), twist = 360 * twists)
     ) [for(i = [0 : n - 1]) let(initial = [r, 0, 0, 1] * rotate(start_angle + i * 360 / n)) [for(t = transforms) initial * t]];
 
 function rounded_path_vertices(path) = [path[0], for(i = [1 : 2 : len(path) - 1]) path[i]]; //! Show the unrounded version of a rounded_path for debug

vitamins/batteries.scad

@@ -44,7 +44,8 @@ AACELL    = ["AACELL",    "Cell AA",                                  50.5, 14.5
 AAACELL   = ["AAACELL",   "Cell AAA",                                 44.5, 10.5,  8, 3.8, 0.8, "grey",           [],                      0, bcontact];
 CCELL     = ["CCELL",     "Cell C",                                   50,   26.2, 20, 7.5, 1.5, "brown",          [],                      0, bcontact];
 DCELL     = ["DCELL",     "Cell D",                                   61.5, 34.2, 22, 8.2, 2.4, "brown",          [],                      0, bcontact];
+A23CELL   = ["A23CELL",   "Cell A23 12v",                             28.5, 10.3, 5.2,5.2, 1.0, "silver",         [],                      0, bcontact];
 
-batteries = [AAACELL, AACELL, CCELL, DCELL, LUMINTOP, S25R18650];
+batteries = [AAACELL, AACELL, CCELL, DCELL, LUMINTOP, S25R18650, A23CELL];
 
 use <battery.scad>

vitamins/bldc_motor.scad

@@ -20,11 +20,11 @@
 //
 //!  Brushless DC electric motor
 //
-include <NopSCADlib/core.scad>
+include <../utils/core/core.scad>
 
-use <NopSCADlib/vitamins/rod.scad>
-use <NopSCADlib/utils/thread.scad>
-use <NopSCADlib/utils/tube.scad>
+use <rod.scad>
+use <../utils/thread.scad>
+use <../utils/tube.scad>
 
 
 function BLDC_diameter(type)                    = type[1]; //! Diameter of motor

vitamins/extrusions.scad

@@ -20,7 +20,7 @@
 // Extrusion
 //
 //                  W   H     d1     d2  sq    cw   cwi   t    st   f    recess
-E1515  = [ "E1515", 15, 15,  -2.5,    0, 5.7,  3.4,  5.7, 1.1, 1.1, 0.5, false ];
+E1515  = [ "E1515", 15, 15,  -3.3,    0, 5.5,  6.2,  9.5, 1.0, 0.9, 0.5, false ];
 E2020  = [ "E2020", 20, 20,  -4.2,   -3,   8,    6, 12.0,   2,   2, 1,   false ];
 E2020t = [ "E2020t",20, 20,  -5.0,   -3, 7.8,  6.2, 11.0, 1.8, 1.5, 1.5, [7.2, 0.5] ];
 E2040  = [ "E2040", 20, 40,  -4.2,   -3,   8,    6, 12.0,   2,   2, 1,   false ];

vitamins/insert.scad

@@ -33,7 +33,7 @@ function insert_ring1_h(type)        = type[6];     //! Height of the top and mi
 function insert_ring2_d(type)        = type[7];     //! Diameter of the middle ring
 function insert_ring3_d(type)        = type[8];     //! Diameter of the bottom ring
 
-function insert_hole_length(type) = round_to_layer(insert_length(type));
+function insert_hole_length(type) = round_to_layer(insert_length(type)); //! Length of the insert rounded to layer height
 
 function insert_nose_length(type, d) = let( //! The length before the second ring.
         length = insert_length(type),

vitamins/pcb.scad

@@ -485,6 +485,50 @@ module usb_uA(cutout = false) { //! Draw USB micro A connector
         }
 }
 
+module usb_miniA(cutout = false) { //! Draw USB mini A connector
+    l = 9.2;
+    iw1 = 7.0;
+    iw2 = 6.0;
+    ih1 = 1.05;
+    ih2 = 1.0;
+    h = 4.0;
+    t = 0.4;
+
+    module D() {
+        hull() {
+            translate([-iw1 / 2, h - t - ih1])
+                square([iw1, ih1]);
+
+            translate([-iw2 / 2, t + ih2])
+                square([iw2, eps]);
+
+        }
+        translate([-iw2 / 2, t])
+            square([iw2, ih2]);
+    }
+
+    if(cutout)
+        rotate([90, 0, 90])
+            linear_extrude(100)
+                offset(2 * panel_clearance)
+                    D();
+    else
+        color("silver") rotate([90, 0, 90]) {
+            linear_extrude(l, center = true)
+                difference() {
+                    offset(t)
+                        D();
+
+                    D();
+                }
+
+            translate_z(-l / 2)
+                linear_extrude(1)
+                    offset(t)
+                        D();
+        }
+}
+
 module usb_C(cutout = false) { //! Draw USB C connector
     l = 7.35;
     w = 8.94;
@@ -1046,6 +1090,7 @@ module pcb_component(comp, cutouts = false, angle = undef) { //! Draw pcb compon
         if(show(comp, "usb_A"))         usb_Ax1(cutouts);
         if(show(comp, "usb_Ax2"))       usb_Ax2(cutouts);
         if(show(comp, "usb_uA"))        usb_uA(cutouts);
+        if(show(comp, "usb_miniA"))     usb_miniA(cutouts);
         if(show(comp, "usb_B"))         usb_B(cutouts);
         if(show(comp, "usb_C"))         usb_C(cutouts);
         if(show(comp, "jack"))          jack(cutouts);
@@ -1089,6 +1134,7 @@ module pcb_component(comp, cutouts = false, angle = undef) { //! Draw pcb compon
             if(show(comp, "smd_res"))       smd_resistor(comp[4], comp[5]);
             if(show(comp, "smd_cap"))       smd_capacitor(comp[4], comp[5], param(6, undef));
             if(show(comp, "smd_sot"))       smd_sot(comp[4], comp[5]);
+            if(show(comp, "smd_soic"))      smd_soic(comp[4], comp[5]);
             if(show(comp, "vero_pin"))      vero_pin(param(4, false));
             if(show(comp, "terminal"))      terminal_block(comp[5], comp[4]);
             if(show(comp, "text"))          color("white") linear_extrude(eps) resize([comp[4], comp[5]]) text(comp[6], font = param(7, "Liberation Mono"), valign = "center", halign = "center");

vitamins/pcbs.scad

@@ -885,7 +885,7 @@ ArduinoNano = let(l = 43.18, w = 17.78, pitch = inch(0.6), pins = 15, poffset =
       [l / 2 + poffset, w / 2 - pitch / 2,  0, "-2p54joiner", pins, 1],
       [l / 2 + poffset, w / 2 + pitch / 2,  0, "-2p54joiner", pins, 1],
       [l / 2 + poffset + inch(0.75), w / 2, 0, "2p54header",  2,    3, false, undef, false, false],
-      [1.75, w / 2, 180, "usb_uA" ],
+      [3.1, w / 2, 180, "usb_miniA" ],
       [l / 2 - inch(0.25), w / 2, 45, "chip", 7, 7, 1.3],
       [l / 2 + poffset + inch(0.15), w / 2,    0, "chip", 3.5, 6,   1.8, silver ], // mock button
       [l / 2 + poffset + inch(0.15), w / 2,    0, "chip", 1.3, 2.6, 2.6, grey(90) ], // mock button

vitamins/sheet.scad

@@ -52,7 +52,7 @@ module corner(r) {
         if(r < 0)
             translate([-r, r])
                 rotate(45)
-                    square(-r * sqrt(2), -r * sqrt(2), center = true);
+                    square([-r * sqrt(2), -r * sqrt(2)], center = true);
         else
             translate([0.5, -0.5])
                 square(1, center = true);

vitamins/smd.scad

@@ -178,3 +178,53 @@ module smd_sot(type, value) { //! Draw an SMD transistor
                     text(value, halign = "center", valign = "center");
 
 }
+
+function smd_soic_size(type)       = type[1];    //! Body length, width and height
+function smd_soic_z(type)          = type[2];    //! Height above PCB surface
+function smd_soic_lead_z(type)     = type[3];    //! Top of lead frame from top
+function smd_soic_lead_pitch(type) = type[4];    //! Lead pitch
+function smd_soic_lead_span(type)  = type[5];    //! Total span of leads
+function smd_soic_lead_size(type)  = type[6];    //! Lead width, foot depth, lead thickness
+
+module smd_soic(type, value) { //! Draw an SMD SOIC
+    vitamin(str("smd_soic(", type[0], "): ", type[0], " package ", value));
+
+    size = smd_soic_size(type);
+    z0 = smd_soic_z(type);
+    z2 = z0 + size.z;
+    z1 = z2 - smd_soic_lead_z(type);
+    slant = 5;                              //! 5 degree body draft angle
+    pitch = smd_soic_lead_pitch(type);
+    span = (smd_soic_lead_span(type) / 2);
+    leads = floor(size.x / pitch) + 1;
+    ls = smd_soic_lead_size(type);
+
+    r = ls.z;
+    gullwing = rounded_path([[0, 0, ls.z / 2], [0, ls.y - ls.z, ls.z / 2], r, [0, ls.y -ls.z + z1 - ls.z, z1 - ls.z / 2], r, [0, span / 2, z1 - ls.z / 2]], $fn = 32);
+
+    color(grey(20))
+        hull()
+            for(z = [z0, z1, z2], inset = abs(z - z1) * tan(slant))
+                translate_z(z)
+                    cube([size.x - 2 * inset, size.y - 2 * inset, eps], center = true);
+
+    color(silver) {
+        for(i = [0 : leads - 1]) {
+            translate([i * pitch - size.x / 2 + (size.x - (leads - 1) * pitch) / 2, -span])
+                sweep(gullwing, rectangle_points(ls.x, ls.z));
+
+        rotate(180)
+            translate([0, -span / 2])
+                translate([i * pitch - size.x / 2 + (size.x - (leads - 1) * pitch) / 2, -span / 2])
+                    sweep(gullwing, rectangle_points(ls.x, ls.z));
+        }
+
+    }
+
+    color("white")
+        translate_z(z0 + size.z)
+            linear_extrude(eps)
+                resize([size.x * 0.9, size.y / 2])
+                    text(value, halign = "center", valign = "center");
+
+}

vitamins/smds.scad

@@ -23,8 +23,9 @@
 
 LED0603 = ["LED0603", [1.6, 0.8,  0.18], [1.0, 0.8,  0.42]];
 LED0805 = ["LED0805", [2.0, 1.25, 0.46], [1.4, 1.25, 0.54]];
+LED1206 = ["LED1206", [3.2, 1.6, 0.5], [2.0, 1.6, .6]];
 
-smd_leds = [LED0603, LED0805];
+smd_leds = [LED0603, LED0805, LED1206];
 
 RES0603 = ["RES0603", [1.6, 0.8, 0.45], 0.3, 1/10];
 RES0805 = ["RES0805", [2.0, 1.2, 0.45], 0.4, 1/8];
@@ -43,4 +44,10 @@ SOT223 = ["SOT223", [6.5, 3.5, 1.6], 0.05, 0.89, 2.3, 7.0, [0.7, 0.95, 0.25], 3]
 
 smd_sots = [SOT23, SOT223];
 
+SOIC8  = ["SOIC8",  [4.90, 3.90, 1.25], 0.10, 0.66, 1.27, 6.00, [0.31, .50, 0.20]];
+SOIC16 = ["SOIC16", [9.90, 3.90, 1.25], 0.10, 0.66, 1.27, 6.00, [0.31, .50, 0.20]];
+SOIC18 = ["SOIC18", [11.40, 7.50, 2.00], 0.10, 1.20, 1.27, 10.30, [0.31, .50, 0.20]];
+
+smd_soics = [SOIC8, SOIC16, SOIC18];
+
 use <smd.scad>

vitamins/stepper_motor.scad

@@ -51,6 +51,18 @@ stepper_body_colour = grey(20);
 stepper_cap_colour  = grey(50);
 stepper_machined_colour = grey(90);
 
+function NEMA_connection_pos(type, jst_connector = false) = let( //! Position of the wires or the connector
+        side = NEMA_width(type),
+        length = NEMA_length(type),
+        cap = NEMA_cap_heights(type)[1],
+        hdr = NEMA_end_connector(type) ? jst_zh_header : jst_ph_header,
+        socket_size = hdr_box_size(hdr),
+        end_conn_inset = socket_size.y - 2
+    )
+    jst_connector ? NEMA_end_connector(type) ? [0, side / 2 + hdr_y_offset(hdr) + socket_size.y / 2 - end_conn_inset, -length]
+                                             : [0, side / 2 + socket_size.z,  hdr_y_offset(hdr) - socket_size.y / 2 - length + cap]
+                  : [0, side / 2, -length + cap / 2];
+
 module NEMA_outline(type) //! 2D outline
     intersection() {
         side = NEMA_width(type);
@@ -185,14 +197,14 @@ module NEMA(type, shaft_angle = 0, jst_connector = false) { //! Draw specified N
                 not_on_bom()
                     leadscrew(shaft_rad * 2, shaft.x + length + shaft2, shaft.y, shaft.z, center = false);
 
-    if(!jst_connector)
+    if(jst_connector == false)
         translate([0, side / 2, -length + cap / 2])
             rotate([90, 0, 0])
                 for(i = [0 : 3])
                     rotate(225 + i * 90)
-                        color(["red", "blue","green","black"][i])
-                            translate([1, 0, 0])
-                                cylinder(r = 1.5 / 2, h = 12, center = true);
+                        color(["red", "green", "black", "blue"][i])
+                            translate([1.48 / sqrt(2), 0, 0])
+                                cylinder(d = 1.48, h = 12, center = true);
 }
 
 module NEMA_screw_positions(type, n = 4) { //! Positions children at the screw holes

vitamins/stepper_motors.scad

@@ -21,20 +21,20 @@
 // NEMA stepper motor model
 //
 
-//                                   corner  body    boss    boss          shaft               cap         thread black  end    shaft    shaft
-//                     side, length, radius, radius, radius, depth, shaft, length,      holes, heights,    dia,   caps,  conn,  length2, bore
-NEMA8   = ["NEMA8",      20, 30,       30/2, 20,    7.5,   1.6,     4,      6,          16,    [8,     8], 2,     true,  true,  0,       0];
-NEMA8BH = ["NEMA8BH",    20, 30,       30/2, 20,    7.5,   1.6,     5,     12,          16,    [8,     8], 2,     true,  true,  7,       2.8];
-NEMA17  = ["NEMA17",   42.3, 47,     53.6/2, 25,     11,     2,     5,     24,          31,    [11.5,  9], 3,     false, false, 0,       0];
-NEMA17M = ["NEMA17M",  42.3, 40,     53.6/2, 25,     11,     2,     5,     20,          31,    [12.5, 11], 3,     false, false, 0,       0];
-NEMA17M8= ["NEMA17M8", 42.3, 40,     53.6/2, 25,     11,     2,     8,     [280, 8, 4], 31,    [12.5, 11], 3,     false, false, 0,       0];
-NEMA17S = ["NEMA17S",  42.3, 34,     53.6/2, 25,     11,     2,     5,     24,          31,    [8,     8], 3,     false, false, 0,       0];
-NEMA17P = ["NEMA17P",  42.3, 26.5,   53.6/2, 25,     11,     2,     5,     26.5,        31,    [10,    8], 3,     false, false, 0,       0];
-NEMA16  = ["NEMA16",   39.5, 19.2,   50.6/2, 50.6/2, 11,     2,     5,     12,          31,    [8,     8], 3,     false, false, 0,       0];
-NEMA14  = ["NEMA14",   35.2, 36,     46.4/2, 21,     11,     2,     5,     21,          26,    [8,     8], 3,     false, false, 0,       0];
-NEMA23  = ["NEMA23",   56.4, 51.2,   75.7/2, 35,   38.1/2, 1.6,   6.35,    24,        47.1,    [8,     8], 3,     false, false, 0,       0];
+//                                              corner  body    boss    boss          shaft               cap         thread black  end    shaft    shaft
+//                                side, length, radius, radius, radius, depth, shaft, length,      holes, heights,    dia,   caps,  conn,  length2, bore
+NEMA8_30      = ["NEMA8_30",        20, 30,       30/2, 20,    7.5,   1.6,     4,      6,          16,    [8,     8], 2,     true,  true,  0,       0];
+NEMA8_30BH    = ["NEMA8_30BH",      20, 30,       30/2, 20,    7.5,   1.6,     5,     12,          16,    [8,     8], 2,     true,  true,  7,       2.8];
+NEMA17_47     = ["NEMA17_47",     42.3, 47,     53.6/2, 25,     11,     2,     5,     24,          31,    [11.5,  9], 3,     false, false, 0,       0];
+NEMA17_40     = ["NEMA17_40",     42.3, 40,     53.6/2, 25,     11,     2,     5,     20,          31,    [12.5, 11], 3,     false, false, 0,       0];
+NEMA17_40L280 = ["NEMA17_40L280", 42.3, 40,     53.6/2, 25,     11,     2,     8,     [280, 8, 4], 31,    [12.5, 11], 3,     false, false, 0,       0];
+NEMA17_34     = ["NEMA17_34",     42.3, 34,     53.6/2, 25,     11,     2,     5,     24,          31,    [8,     8], 3,     false, false, 0,       0];
+NEMA17_27     = ["NEMA17_27",     42.3, 26.5,   53.6/2, 25,     11,     2,     5,     26.5,        31,    [10,    8], 3,     false, false, 0,       0];
+NEMA16_19     = ["NEMA16_19",     39.5, 19.2,   50.6/2, 50.6/2, 11,     2,     5,     12,          31,    [8,     8], 3,     false, false, 0,       0];
+NEMA14_36     = ["NEMA14_36",     35.2, 36,     46.4/2, 21,     11,     2,     5,     21,          26,    [8,     8], 3,     false, false, 0,       0];
+NEMA23_51     = ["NEMA23_51",     56.4, 51.2,   75.7/2, 35,   38.1/2, 1.6,   6.35,    24,        47.1,    [8,     8], 3,     false, false, 0,       0];
 
-stepper_motors = [NEMA8, NEMA8BH, NEMA14, NEMA16, NEMA17P, NEMA17S, NEMA17M, NEMA17, NEMA23];
+stepper_motors = [NEMA8_30, NEMA8_30BH, NEMA14_36, NEMA16_19, NEMA17_27, NEMA17_34, NEMA17_40, NEMA17_47, NEMA23_51];
 small_steppers = [];
 
 use <stepper_motor.scad>

vitamins/veroboard.scad

@@ -41,7 +41,7 @@ function vero_track_width(type)    = vero_pitch(type) * 0.8; //! The width of th
 function vero_length(type) = vero_holes(type) * vero_pitch(type); //! Length of the board
 function vero_width(type) = vero_strips(type) * vero_pitch(type); //! Width of the board
 
-function vero(name, assembly, holes, strips, pitch = inch(0.1), fr4 = false, screw = M3_cap_screw, mounting_holes = [], breaks = [], no_tracks = [], components = [], joints = []) = //! Constructor
+function vero(name, assembly, holes, strips, pitch = 2.54, fr4 = false, screw = M3_cap_screw, mounting_holes = [], breaks = [], no_tracks = [], components = [], joints = []) = //! Constructor
     [ name, assembly, holes, strips, pitch, fr4, screw, mounting_holes, breaks, no_tracks, components, joints ];
 
 function vero_size(type) = [vero_length(type), vero_width(type), vero_thickness(type)]; //! Board size
@@ -89,7 +89,7 @@ module veroboard(type) { //! Draw specified veroboard with missing tracks and tr
     tc = vero_fr4(type) ? "silver" : copper;
     no_track = vero_no_track(type);
 
-    vitamin(str("veroboard(", type[0], "): Veroboard ", holes, " holes x ", strips, "strips"));
+    vitamin(str("veroboard(", type[0], "): Veroboard ", holes, " holes x ", strips, " strips"));
 
     color(colour) linear_extrude(vero_thickness(type))
         difference() {

vitamins/washer.scad

@@ -26,7 +26,7 @@ include <../utils/core/core.scad>
 include <../utils/sweep.scad>
 
 soft_washer_colour = grey(20);
-hard_washer_colour = grey(80);
+hard_washer_colour = grey(85);
 star_washer_colour = brass;
 
 function washer_size(type)            = type[1]; //! Nominal size

vitamins/wire.scad

@@ -18,9 +18,11 @@
 //
 
 //
-//! Just a BOM entry at the moment and cable bundle size functions for holes, plus cable ties.
+//! Utilities for adding wires to the BOM and optionally drawing them and cable bundle size functions for holes, plus cable ties.
 //
 include <../utils/core/core.scad>
+use <../utils/sweep.scad>
+use <../utils/maths.scad>
 include <zipties.scad>
 
 module wire(colour, strands, length, strand = 0.2)   //! Add stranded wire to the BOM
@@ -35,15 +37,16 @@ module ribbon_cable(ways, length)                   //! Add ribbon cable to the
 function cable_wires(cable)     = cable[0]; //! Number of wires in a bundle
 function cable_wire_size(cable) = cable[1]; //! Size of each wire in a bundle
 function cable_is_ribbon(cable) = len(cable) > 2 && cable[2]; //! Is a ribbon cable?
-function cable_wire_colours(cable) = assert(len(cable[3]) == cable_wires(cable)) cable[3]; //! Individual wire colours
-function cable(wires, size, colours, ribbon = false) = [wires, size, ribbon, colours]; //! Cable constructor
+function cable_wire_colours(cable) = assert(len(cable[3]) >= cable_wires(cable)) cable[3]; //! Individual wire colours
+function cable_tlen(cable)      = cable[4]; //! Twisted cable twist length
+function cable(wires, size, colours, ribbon = false, tlen = 25) = [wires, size, ribbon, colours, tlen]; //! Cable constructor
 
 // numbers from http://mathworld.wolfram.com/CirclePacking.html
 function cable_radius(cable) = [0, 1, 2, 2.15, 2.41, 2.7, 3, 3, 3.3][cable_wires(cable)] * cable_wire_size(cable) / 2; //! Radius of a bundle of wires, see <http://mathworld.wolfram.com/CirclePacking.html>.
 
 function wire_hole_radius(cable) = ceil(4 * cable_radius(cable) + 1) / 4; //! Radius of a hole to accept a bundle of wires, rounded up to standard metric drill size
 
-function cable_bundle(cable) = //! Arrangement of a bundle in a flat cable clip
+function cable_bundle(cable) = //! Dimensions of the bounding rectangle of a bundle of wires in a flat cable clip
     (cable_is_ribbon(cable) ? [cable_wires(cable), 1] :
     [[0,0], [1,1], [2,1], [2, 1 + sin(60)], [2,2], [3, 1 + sin(60)], [3,2]][cable_wires(cable)]) * cable_wire_size(cable);
 
@@ -53,12 +56,42 @@ function cable_bundle_positions(cable) = let( //! Positions of wires in a bundle
         top = wires - bottom
     )
     [for(i = [0 : 1 : bottom - 1]) [i - (bottom - 1) / 2, 0.5],
-     for(i = [0 : 1 : top - 1])    [i - (top - 1) / 2, top == bottom ? 1.5 : 0.5 + sin(60)]
+     for(i = [top - 1 : -1 : 0])   [i - (top - 1) / 2, top == bottom ? 1.5 : 0.5 + sin(60)]
     ] * cable_wire_size(cable);
 
 function cable_width(cable)  = cable_bundle(cable).x; //! Width in flat clip
 function cable_height(cable) = cable_bundle(cable).y; //! Height in flat clip
 
+function cable_twisted_radius(cable) = let( //! Approximate radius of a cable when twisted
+        tlen = cable_tlen(cable),               // Twist length
+        a = cable_wire_size(cable) / 2,         // Ellipse minor axis
+        R = cable_radius(cable) - a,            // Radius of wire centres when not twisted
+        angle = atan2(tlen, 2 * PI * R),        // Slope angle of the spiral
+        b = a / sin(angle),                     // Ellipse major axis
+        grad = tan(180 / cable_wires(cable)),   // Gradient at contact point between elipses
+        x = a^2 / sqrt(a^2 + (b / grad)^2),     // Contact point of the ellipse tangent
+        y = b * sqrt(1 - x^2 / a^2)
+    ) R ? x + y / grad + a : a;                 // Where the tangent meets the X axis plus radius
+
+function twisted_cable(cable, path, irot = 0, frot = 0) = let(      //! Return the paths for a twisted cable, `irot` is the initial rotation and frot the final rotation
+        tlen = cable_tlen(cable),               // Twist length
+        r = cable_wire_size(cable) / 2,
+        pitch = cable_twisted_radius(cable) - r,
+        wires = cable_wires(cable),
+        bottom = wires > 4 ? 3 : 2,
+        irot = irot + 90 - 180 * (bottom - 1) / wires
+    )
+    spiral_paths(path, wires, pitch, round(path_length(path) / tlen) - frot / 360, irot);
+
+module cable(cable, paths) {                    //! Draw a cable, given a list of paths
+    wires = cable_wires(cable);
+    assert(len(paths) == wires);
+    r = cable_wire_size(cable) / 2;
+    for(i = [0 : wires - 1])
+        color(cable_wire_colours(cable)[i])
+            sweep(paths[i], circle_points(r), convexity = 5);
+}
+
 module mouse_hole(cable, h = 100, teardrop = false) { //! A mouse hole to allow a panel to go over a wire bundle.
     r = wire_hole_radius(cable);
 

vitamins/ziptie.scad

@@ -33,17 +33,16 @@ function ziptie_tail(type)      = type[5]; //! The length without teeth
 module ziptie(type, r = 5, t = 0) //! Draw specified ziptie wrapped around radius `r` and optionally through panel thickness `t`
 {
     latch = ziptie_latch(type);
-    lx = latch.x / 2;
     zt = ziptie_thickness(type);
-    cr = zt;                        // sharp corner radius
+    lx = min(latch.x / 2, r + zt / 2);
+    right_bulge = (r > lx - zt / 2) || !t;
+    cr = zt / 2;                        // sharp corner radius
     z = r + t - cr;
     x = r - cr;
-    inside_corners  = t ? [ [0, 0, r],      [-x, z, cr],      [x, z, cr]      ] : [];
     outside_corners = t ? [ [0, 0, r + zt], [-x, z, cr + zt], [x, z, cr + zt] ] : [];
     x1 = lx - zt / 2;
     x2 = x1 + x1 * zt / r;
-    inside_path  = concat([ [0, 0, r],      [x1, -r,      eps] ], inside_corners);
-    outside_path = concat([ [0, 0, r + zt], [x2, -r - zt, eps] ], outside_corners);
+    outside_path = concat([ if(right_bulge) [0, 0, r + zt], [x2, -r - zt, eps] ], outside_corners);
 
     tangents = rounded_polygon_tangents(outside_path);
     length = ceil(rounded_polygon_length(outside_path, tangents) + ziptie_tail(type) + latch.z + 1);
@@ -56,7 +55,9 @@ module ziptie(type, r = 5, t = 0) //! Draw specified ziptie wrapped around radiu
         linear_extrude(width, center = true)
             difference() {
                 rounded_polygon(outside_path, tangents);
-                rounded_polygon(inside_path);
+
+                offset(-zt)
+                    rounded_polygon(outside_path, tangents);
              }
 
         translate([lx, -r])