Merge branch 'jeroenrnl-nuthousing'

screw_insert() now takes a short flag.
screw_length() can now be passed an insert object.

.gitignore

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

CHANGELOG.md

@@ -3,6 +3,59 @@
 This changelog is generated by `changelog.py` using manually added semantic version tags to classify commits as breaking changes, additions or fixes.
 
 
+### [v20.13.0](https://github.com/nophead/NopSCADlib/releases/tag/v20.13.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v20.12.0...v20.13.0 "diff with v20.12.0")
+*   2022-09-27 [`ec85cc5`](https://github.com/nophead/NopSCADlib/commit/ec85cc5d4c76baedae670a5652194bd1799a7094 "show commit") [C.](# "Chris") Updated images and readme.
+
+*   2022-09-24 [`fb66954`](https://github.com/nophead/NopSCADlib/commit/fb6695471f935057a0949e55f70a39911ac81f4c "show commit") [J.R.](# "Jeroen Roos") Shaft coupling: Add flexible SC `/` 6x8 flexible SC
+
+ * Added the possibility for shaft couplings to be flexible and added a 6x8
+example of such a coupling.
+
+### [v20.12.0](https://github.com/nophead/NopSCADlib/releases/tag/v20.12.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v20.11.0...v20.12.0 "diff with v20.11.0")
+*   2022-09-27 [`c9ac393`](https://github.com/nophead/NopSCADlib/commit/c9ac393c0c7b025b3e6ad9e1030d1b13f8b879c3 "show commit") [C.](# "Chris") Printed corner blocks now have a `short_insert` option.
+
+*   2022-09-27 [`208334a`](https://github.com/nophead/NopSCADlib/commit/208334a585ed0605bf7dbaab1050c060aa15edb7 "show commit") [C.](# "Chris") Printed box now has a short insert option.
+
+*   2022-09-27 [`3a17b89`](https://github.com/nophead/NopSCADlib/commit/3a17b89d5ceb69834b23ff6bc46523f2dfb15f99 "show commit") [C.](# "Chris") Added short inserts and M5 inserts.
+`screw_insert()` now takes a short flag.
+`screw_length()` can now be passed an insert object.
+
+*   2022-09-25 [`0f36c02`](https://github.com/nophead/NopSCADlib/commit/0f36c02b5e34b0b45d258ff8e6ed4536f0601d92 "show commit") [C.](# "Chris") Added `layer_height0` global variable and updated `round_to_layer()` to handle it.
+
+ * Moved functions from `global_defs.scad` to `global.scad` so they get documented.
+
+### [v20.11.0](https://github.com/nophead/NopSCADlib/releases/tag/v20.11.0 "show release") Additions [...](https://github.com/nophead/NopSCADlib/compare/v20.10.3...v20.11.0 "diff with v20.10.3")
+*   2022-08-30 [`c1e4625`](https://github.com/nophead/NopSCADlib/commit/c1e4625382646faf6a00e78ac01e495a88169b35 "show commit") [C.](# "Chris") Replaced generic chips with SOIC8.
+Updated images and readme.
+
+*   2022-08-29 [`6059c5f`](https://github.com/nophead/NopSCADlib/commit/6059c5f5569a9fc2ba08e448bbf90328fb985ed3 "show commit") [C.](# "ChemicalXandco") add L9110S 2-Channel motor driver module
+
+#### [v20.10.3](https://github.com/nophead/NopSCADlib/releases/tag/v20.10.3 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v20.10.2...v20.10.3 "diff with v20.10.2")
+*   2022-08-03 [`4ceb6bd`](https://github.com/nophead/NopSCADlib/commit/4ceb6bd8639cd39ac39798b3eccd178526a56c13 "show commit") [C.](# "Chris") Fixed a gap in printed hinges.
+
+#### [v20.10.2](https://github.com/nophead/NopSCADlib/releases/tag/v20.10.2 "show release") Fixes [...](https://github.com/nophead/NopSCADlib/compare/v20.10.1...v20.10.2 "diff with v20.10.1")
+*   2022-07-16 [`664d04a`](https://github.com/nophead/NopSCADlib/commit/664d04ad93c28c2614d5991e2b8dfa78964f6a99 "show commit") [C.](# "Chris") Now logs the time taken to run non OpenSCAD commands in `cmd_times.txt`
+
+#### [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.
 

global_defs.scad

@@ -29,6 +29,7 @@ rr_green = [0, 146/255, 0];                                               // Rep
 crimson  = [220/255, 20/255, 60/255];
 
 layer_height    = is_undef($layer_height)    ? 0.25   : $layer_height;    // layer height when printing
+layer_height0   = is_undef($layer_height0)   ? layer_height : $layer_height0; // height of first layer if different
 extrusion_width = is_undef($extrusion_width) ? 0.5    : $extrusion_width; // filament width when printing
 nozzle          = is_undef($nozzle)          ? 0.45   : $nozzle;          // 3D printer nozzle
 cnc_bit_r       = is_undef($cnc_bit_r)       ? 1.2    : $cnc_bit_r;       // minimum tool radius when milling 2D objects
@@ -51,10 +52,7 @@ eps = 1/128;     // small fudge factor to stop CSG barfing on coincident faces.
 $fa = 6;
 $fs = extrusion_width / 2;
 
-function round_to_layer(z) = ceil(z / layer_height) * layer_height;         //! Round up to a multiple of layer_height.
-
 // Some additional named colours
-function grey(n) = [0.01, 0.01, 0.01] * n;                                  //! Generate a shade of grey to pass to color().
 silver           = [0.75, 0.75, 0.75];
 gold             = [255, 215,   0] / 255;
 brass            = [255, 220, 100] / 255;

libtest.scad

@@ -279,6 +279,9 @@ translate([x0, pulleys_y])
 translate([x0, leadnuts_y])
     leadnuts();
 
+translate([x0 + 120, leadnuts_y])
+    leadnuthousings();
+
 translate([x0, linear_bearings_y]) {
     linear_bearings();
     rods();

printed/camera_housing.scad

@@ -23,7 +23,6 @@
 include <../core.scad>
 include <../vitamins/cameras.scad>
 use <../vitamins/pcb.scad>
-use <../vitamins/insert.scad>
 
 wall = 1.75;
 min_wall = 2 * extrusion_width;

printed/corner_block.scad

@@ -44,47 +44,49 @@ overshoot = 2;      // how far screw can overshoot the insert
 
 function corner_block_screw() = def_screw; //! Default screw type
 
-function corner_block_hole_offset(screw = def_screw) = //! Hole offset from the edge
+function corner_block_hole_offset(screw = def_screw, short_insert = false) = //! Hole offset from the edge
-    let(insert = screw_insert(screw))
+    let(insert = screw_insert(screw, short_insert))
         insert_length(insert) + max(overshoot + screw_clearance_radius(screw), insert_hole_radius(insert)) + 1;
 
+function corner_block_width(screw = def_screw, short_insert = false) = //! Block width, depth and height
+    corner_block_hole_offset(screw, short_insert) + insert_outer_d(screw_insert(screw, short_insert)) / 2 + wall;
 
-function corner_block_width(screw = def_screw) = //! Block width, depth and height
+function corner_block_v_hole(screw = def_screw, short_insert = false) = //! Transform to bottom hole
-    corner_block_hole_offset(screw) + insert_outer_d(screw_insert(screw)) / 2 + wall;
+    let(offset = corner_block_hole_offset(screw, short_insert))
+        translate([offset, offset]) * rotate([180, 0, 0]);
 
-function corner_block_v_hole(screw = def_screw) = let(offset = corner_block_hole_offset(screw)) translate([offset, offset]) * rotate([180, 0, 0]); //! Transform to bottom hole
+function corner_block_h_holes(screw = def_screw, short_insert = false) = //! List of transforms to side holes
-
+    let(offset = corner_block_hole_offset(screw, short_insert))
-function corner_block_h_holes(screw = def_screw) = //! List of transforms to side holes
-    let(offset = corner_block_hole_offset(screw))
         [translate([offset, 0,      offset])                * rotate([90, 0,   0]),
          translate([0,      offset, offset - layer_height]) * rotate([90, 0, -90])];
 
-function corner_block_holes(screw) = concat([corner_block_v_hole(screw)], corner_block_h_holes(screw)); //! List of transforms to all holes
+function corner_block_holes(screw, short_insert = false) =  //! List of transforms to all holes
+    concat([corner_block_v_hole(screw, short_insert)], corner_block_h_holes(screw, short_insert));
 
-module corner_block_v_hole(screw = def_screw) //! Place children at the bottom screw hole
+module corner_block_v_hole(screw = def_screw, short_insert = false) //! Place children at the bottom screw hole
-    multmatrix(corner_block_v_hole(screw))
+    multmatrix(corner_block_v_hole(screw, short_insert))
         children();
 
-module corner_block_h_holes(screw = def_screw, index = undef) //! Place children at the side screw holes
+module corner_block_h_holes(screw = def_screw, index = undef, short_insert = false) //! Place children at the side screw holes
-    for(p = !is_undef(index) ? [corner_block_h_holes(screw)[index]] : corner_block_h_holes(screw))
+    for(p = !is_undef(index) ? [corner_block_h_holes(screw, short_insert)[index]] : corner_block_h_holes(screw, short_insert))
         multmatrix(p)
             children();
 
-module corner_block_holes(screw = def_screw) //! Place children at all the holes
+module corner_block_holes(screw = def_screw, short_insert = false) //! Place children at all the holes
-    for(p = corner_block_holes(screw))
+    for(p = corner_block_holes(screw, short_insert))
         multmatrix(p)
             children();
 
-module corner_block(screw = def_screw, name = false) { //! Generate the STL for a printed corner block
+module corner_block(screw = def_screw, name = false, short_insert = false) { //! Generate the STL for a printed corner block
     r = 1;
-    cb_width = corner_block_width(screw);
+    cb_width = corner_block_width(screw, short_insert);
     cb_height = cb_width;
     cb_depth = cb_width;
-    insert = screw_insert(screw);
+    insert = screw_insert(screw, short_insert);
     corner_rad = insert_outer_d(insert) / 2 + wall;
-    offset = corner_block_hole_offset(screw);
+    offset = corner_block_hole_offset(screw, short_insert);
 
-    stl(name ? name : str("corner_block", "_M", screw_radius(screw) * 20))
+    stl(name ? name : str("corner_block", "_M", screw_radius(screw) * 20, short_insert ? "_s": ""))
         difference() {
             hull()  {
                 translate([r, r])
@@ -110,53 +112,54 @@ module corner_block(screw = def_screw, name = false) { //! Generate the STL for
                     rotate([0, 90, 180])
                         rounded_cylinder(r = corner_rad, h = r, r2 = r);
             }
-            corner_block_v_hole(screw)
+            corner_block_v_hole(screw, short_insert)
                 insert_hole(insert, overshoot);
 
-            corner_block_h_holes(screw)
+            corner_block_h_holes(screw, short_insert = short_insert)
                 insert_hole(insert, overshoot, true);
 
             children();
         }
 }
 
-module corner_block_assembly(screw = def_screw, name = false) //! The printed block with inserts
+module corner_block_assembly(screw = def_screw, name = false, short_insert = false) //! The printed block with inserts
-assembly(name ? name : str("corner_block_M", 20 * screw_radius(screw)), ngb = true) {
+assembly(name ? name : str("corner_block_M", 20 * screw_radius(screw), short_insert ? "_s": ""), ngb = true) {
-    insert = screw_insert(screw);
+    insert = screw_insert(screw, short_insert);
 
     stl_colour(name ? pp2_colour : pp1_colour)
-        render() corner_block(screw, name) children();
+        render() corner_block(screw, name, short_insert) children();
 
-    corner_block_h_holes(screw)
+    corner_block_h_holes(screw, short_insert = short_insert)
         insert(insert);
 
-    corner_block_v_hole(screw)
+    corner_block_v_hole(screw, short_insert)
         insert(insert);
 }
 
-module fastened_corner_block_assembly(thickness, screw = def_screw, thickness_below = undef, thickness_side2 = undef, name = false, show_block = true, star_washers = true) { //! Printed block with all fasteners
+module fastened_corner_block_assembly(thickness, screw = def_screw, thickness_below = undef, thickness_side2 = undef, name = false, show_block = true, star_washers = true, short_insert = false) { //! Printed block with all fasteners
     thickness2 = !is_undef(thickness_below) ? thickness_below : thickness;
     thickness3 = !is_undef(thickness_side2) ? thickness_side2 : thickness;
-    function screw_len(t) = screw_length(screw, t + overshoot, star_washers ? 2 : 1, true);
+    insert = screw_insert(screw, short_insert);
+    function screw_len(t) = screw_length(screw, t + overshoot, star_washers ? 2 : 1, insert);
     screw_length = screw_len(thickness);
     screw_length2 = screw_len(thickness2);
     screw_length3 = screw_len(thickness3);
 
     if(show_block)
-        corner_block_assembly(screw, name) children();
+        corner_block_assembly(screw, name, short_insert) children();
 
     if(thickness)
-        corner_block_h_holes(screw, 0)
+        corner_block_h_holes(screw, 0, short_insert)
             translate_z(thickness)
                 screw_and_washer(screw, screw_length, star_washers);
 
     if(thickness3)
-        corner_block_h_holes(screw, 1)
+        corner_block_h_holes(screw, 1, short_insert)
             translate_z(thickness3)
                 screw_and_washer(screw, screw_length3, star_washers);
 
     if(thickness2)
-        corner_block_v_hole(screw)
+        corner_block_v_hole(screw, short_insert)
             translate_z(thickness2)
                 screw_and_washer(screw, screw_length2, star_washers);
 }
@@ -165,6 +168,10 @@ module corner_block_M20_stl() corner_block(M2_cap_screw);
 module corner_block_M25_stl() corner_block(M2p5_cap_screw);
 module corner_block_M30_stl() corner_block(M3_cap_screw);
 module corner_block_M40_stl() corner_block(M4_cap_screw);
+module corner_block_M20_s_stl() corner_block(M2_cap_screw, short_insert = true);
+module corner_block_M25_s_stl() corner_block(M2p5_cap_screw, short_insert = true);
+module corner_block_M30_s_stl() corner_block(M3_cap_screw, short_insert = true);
+module corner_block_M40_s_stl() corner_block(M4_cap_screw, short_insert = true);
 //
 //! 1. Lay the blocks out and place an M2 insert in each upward facing hole.
 //! 1. Push them home with a soldering iron with a conical bit heated to 200°C.
@@ -197,36 +204,69 @@ module corner_block_M30_assembly() corner_block_assembly(M3_cap_screw);
 //
 module corner_block_M40_assembly() corner_block_assembly(M4_cap_screw);
 
-function 2screw_block_width(screw = def_screw) = //! 2 screw block width is narrower, height and depth are as corner_block
+//
-    insert_outer_d(screw_insert(screw)) + 2 * wall;
+//! 1. Lay the blocks out and place an M2 insert in each upward facing hole.
+//! 1. Push them home with a soldering iron with a conical bit heated to 200°C.
+//! When removing the iron it helps to twist it a little anti-clockwise to release it from the thread.
+//! 1. Lay the blocks on each of their other two flat sides and repeat.
+//
+module corner_block_M20_s_assembly() corner_block_assembly(M2_cap_screw, short_insert = true);
 
-function 2screw_block_v_hole(screw = def_screw) = translate([0, corner_block_hole_offset(screw)]) * rotate([180, 0, 0]); //! Transform to bottom hole
+//
-function 2screw_block_h_hole(screw = def_screw) = translate([0, 0, corner_block_hole_offset(screw)]) * rotate([90, 0, 0]); //! Transform to front hole
+//! 1. Lay the blocks out and place an M2.5 insert in each upward facing hole.
-function 2screw_block_holes(screw) = concat([2screw_block_v_hole(screw)], [2screw_block_h_hole(screw)]); //! List of transforms to both holes
+//! 1. Push them home with a soldering iron with a conical bit heated to 200°C.
+//! When removing the iron it helps to twist it a little anti-clockwise to release it from the thread.
+//! 1. Lay the blocks on each of their other two flat sides and repeat.
+//
+module corner_block_M25_s_assembly() corner_block_assembly(M2p5_cap_screw, short_insert = true);
 
-module 2screw_block_v_hole(screw = def_screw) //! Place children at the bottom screw hole
+//
-    multmatrix(2screw_block_v_hole(screw))
+//! 1. Lay the blocks out and place an M3 insert in each upward facing hole.
+//! 1. Push them home with a soldering iron with a conical bit heated to 200°C.
+//! When removing the iron it helps to twist it a little anti-clockwise to release it from the thread.
+//! 1. Lay the blocks on each of their other two flat sides and repeat.
+//
+module corner_block_M30_s_assembly() corner_block_assembly(M3_cap_screw, short_insert = true);
+
+//
+//! 1. Lay the blocks out and place an M4 insert in each upward facing hole.
+//! 1. Push them home with a soldering iron with a conical bit heated to 200°C.
+//! When removing the iron it helps to twist it a little anti-clockwise to release it from the thread.
+//! 1. Lay the blocks on each of their other two flat sides and repeat.
+//
+module corner_block_M40_s_assembly() corner_block_assembly(M4_cap_screw, short_insert = true);
+
+
+function 2screw_block_width(screw = def_screw, short_insert = false) = //! 2 screw block width is narrower, height and depth are as corner_block
+    insert_outer_d(screw_insert(screw, short_insert)) + 2 * wall;
+
+function 2screw_block_v_hole(screw = def_screw, short_insert = false) = translate([0, corner_block_hole_offset(screw, short_insert)]) * rotate([180, 0, 0]); //! Transform to bottom hole
+function 2screw_block_h_hole(screw = def_screw, short_insert = false) = translate([0, 0, corner_block_hole_offset(screw, short_insert)]) * rotate([90, 0, 0]); //! Transform to front hole
+function 2screw_block_holes(screw, short_insert = false) = concat([2screw_block_v_hole(screw, short_insert)], [2screw_block_h_hole(screw, short_insert)]); //! List of transforms to both holes
+
+module 2screw_block_v_hole(screw = def_screw, short_insert = false) //! Place children at the bottom screw hole
+    multmatrix(2screw_block_v_hole(screw, short_insert))
         children();
 
-module 2screw_block_h_hole(screw = def_screw) //! Place children at the front screw hole
+module 2screw_block_h_hole(screw = def_screw, short_insert = false) //! Place children at the front screw hole
-    multmatrix(2screw_block_h_hole(screw))
+    multmatrix(2screw_block_h_hole(screw, short_insert))
         children();
 
-module 2screw_block_holes(screw = def_screw) //! Place children at both screw holes
+module 2screw_block_holes(screw = def_screw, short_insert = false) //! Place children at both screw holes
-    for(p = 2screw_block_holes(screw))
+    for(p = 2screw_block_holes(screw, short_insert))
         multmatrix(p)
             children();
 
-module 2screw_block(screw = def_screw, name = false) { //! Generate the STL for a printed 2screw block
+module 2screw_block(screw = def_screw, name = false, short_insert = false) { //! Generate the STL for a printed 2screw block
     r = 1;
-    cb_width = 2screw_block_width(screw);
+    cb_width = 2screw_block_width(screw, short_insert);
-    cb_height = corner_block_width(screw);
+    cb_height = corner_block_width(screw, short_insert);
     cb_depth = cb_height;
-    insert = screw_insert(screw);
+    insert = screw_insert(screw, short_insert);
     corner_rad = insert_outer_d(insert) / 2 + wall;
-    offset = corner_block_hole_offset(screw);
+    offset = corner_block_hole_offset(screw, short_insert);
 
-    stl(name ? name : str("2screw_block", "_M", screw_radius(screw) * 20))
+    stl(name ? name : str("2screw_block", "_M", screw_radius(screw) * 20, short_insert ? "_s" : ""))
         difference() {
             hull()  {
                 translate([-cb_width / 2 + r, r])
@@ -245,43 +285,44 @@ module 2screw_block(screw = def_screw, name = false) { //! Generate the STL for
                     rotate([-90, 0, 180])
                         rounded_cylinder(r = corner_rad, h = r, r2 = r);
             }
-            2screw_block_v_hole(screw)
+            2screw_block_v_hole(screw, short_insert)
                 insert_hole(insert, overshoot);
 
-            2screw_block_h_hole(screw)
+            2screw_block_h_hole(screw, short_insert)
                 insert_hole(insert, overshoot, true);
 
             children();
         }
 }
 
-module 2screw_block_assembly(screw = def_screw, name = false) //! The printed block with inserts
+module 2screw_block_assembly(screw = def_screw, name = false, short_insert = false) //! The printed block with inserts
-assembly(name ? name : str("2screw_block_M", 20 * screw_radius(screw)), ngb = true) {
+assembly(name ? name : str("2screw_block_M", 20 * screw_radius(screw), short_insert ? "_s" :""), ngb = true) {
-    insert = screw_insert(screw);
+    insert = screw_insert(screw, short_insert);
 
     stl_colour(name ? pp2_colour : pp1_colour)
-        render() 2screw_block(screw, name) children();
+        render() 2screw_block(screw, name, short_insert) children();
 
-    2screw_block_holes(screw)
+    2screw_block_holes(screw, short_insert)
         insert(insert);
 }
 
-module fastened_2screw_block_assembly(thickness, screw = def_screw, thickness_below = undef, name = false, show_block = true, star_washers = true) { //! Printed block with fasteners
+module fastened_2screw_block_assembly(thickness, screw = def_screw, thickness_below = undef, name = false, show_block = true, star_washers = true, short_insert = false) { //! Printed block with fasteners
     thickness2 = !is_undef(thickness_below) ? thickness_below : thickness;
-    function screw_len(t) = screw_length(screw, t + overshoot, star_washers ? 2 : 1, true);
+    insert = screw_insert(screw, short_insert);
+    function screw_len(t) = screw_length(screw, t + overshoot, star_washers ? 2 : 1, insert);
     screw_length = screw_len(thickness);
     screw_length2 = screw_len(thickness2);
 
     if(show_block)
-        2screw_block_assembly(screw, name) children();
+        2screw_block_assembly(screw, name, short_insert) children();
 
     if(thickness)
-        2screw_block_h_hole(screw)
+        2screw_block_h_hole(screw, short_insert)
             translate_z(thickness)
                 screw_and_washer(screw, screw_length, star_washers);
 
     if(thickness2)
-        2screw_block_v_hole(screw)
+        2screw_block_v_hole(screw, short_insert)
             translate_z(thickness2)
                 screw_and_washer(screw, screw_length2, star_washers);
 }
@@ -289,6 +330,11 @@ module 2screw_block_M20_stl() 2screw_block(M2_cap_screw);
 module 2screw_block_M25_stl() 2screw_block(M2p5_cap_screw);
 module 2screw_block_M30_stl() 2screw_block(M3_cap_screw);
 module 2screw_block_M40_stl() 2screw_block(M4_cap_screw);
+
+module 2screw_block_M20_s_stl() 2screw_block(M2_cap_screw, short_insert = true);
+module 2screw_block_M25_s_stl() 2screw_block(M2p5_cap_screw, short_insert = true);
+module 2screw_block_M30_s_stl() 2screw_block(M3_cap_screw, short_insert = true);
+module 2screw_block_M40_s_stl() 2screw_block(M4_cap_screw, short_insert = true);
 //
 //! 1. Lay the blocks out and place an M2 insert in the forward facing hole.
 //! 1. Push them home with a soldering iron with a conical bit heated to 200°C.
@@ -297,6 +343,14 @@ module 2screw_block_M40_stl() 2screw_block(M4_cap_screw);
 //
 module 2screw_block_M20_assembly() 2screw_block_assembly(M2_cap_screw);
 
+//
+//! 1. Lay the blocks out and place an M2 insert in the forward facing hole.
+//! 1. Push them home with a soldering iron with a conical bit heated to 200°C.
+//! When removing the iron it helps to twist it a little anti-clockwise to release it from the thread.
+//! 1. Lay the blocks on each of their other flat side and repeat.
+//
+module 2screw_block_M20_s_assembly() 2screw_block_assembly(M2_cap_screw, short_insert = true);
+
 //
 //! 1. Lay the blocks out and place an M2.5 insert in the forward facing hole.
 //! 1. Push them home with a soldering iron with a conical bit heated to 200°C.
@@ -305,6 +359,14 @@ module 2screw_block_M20_assembly() 2screw_block_assembly(M2_cap_screw);
 //
 module 2screw_block_M25_assembly() 2screw_block_assembly(M2p5_cap_screw);
 
+//
+//! 1. Lay the blocks out and place an M2.5 insert in the forward facing hole.
+//! 1. Push them home with a soldering iron with a conical bit heated to 200°C.
+//! When removing the iron it helps to twist it a little anti-clockwise to release it from the thread.
+//! 1. Lay the blocks on each of their other flat side and repeat.
+//
+module 2screw_block_M25_s_assembly() 2screw_block_assembly(M2p5_cap_screw, short_insert = true);
+
 //
 //! 1. Lay the blocks out and place an M3 insert in the forward facing hole.
 //! 1. Push them home with a soldering iron with a conical bit heated to 200°C.
@@ -313,6 +375,14 @@ module 2screw_block_M25_assembly() 2screw_block_assembly(M2p5_cap_screw);
 //
 module 2screw_block_M30_assembly() 2screw_block_assembly(M3_cap_screw);
 
+//
+//! 1. Lay the blocks out and place an M3 insert in the forward facing hole.
+//! 1. Push them home with a soldering iron with a conical bit heated to 200°C.
+//! When removing the iron it helps to twist it a little anti-clockwise to release it from the thread.
+//! 1. Lay the blocks on each of their other flat side and repeat.
+//
+module 2screw_block_M30_s_assembly() 2screw_block_assembly(M3_cap_screw, short_insert = true);
+
 //
 //! 1. Lay the blocks out and place an M4 insert in the forward facing hole.
 //! 1. Push them home with a soldering iron with a conical bit heated to 200°C.
@@ -320,3 +390,11 @@ module 2screw_block_M30_assembly() 2screw_block_assembly(M3_cap_screw);
 //! 1. Lay the blocks on each of their other flat side and repeat.
 //
 module 2screw_block_M40_assembly() 2screw_block_assembly(M4_cap_screw);
+
+//
+//! 1. Lay the blocks out and place an M4 insert in the forward facing hole.
+//! 1. Push them home with a soldering iron with a conical bit heated to 200°C.
+//! When removing the iron it helps to twist it a little anti-clockwise to release it from the thread.
+//! 1. Lay the blocks on each of their other flat side and repeat.
+//
+module 2screw_block_M40_s_assembly() 2screw_block_assembly(M4_cap_screw, short_insert = true);

printed/flat_hinge.scad

@@ -111,8 +111,8 @@ module hinge_male(type, female = false) {       //! The half with the stationary
                                         rotate(180)
                                             teardrop(r = kr, h = 0);
 
-                                        translate([-kr - 1, -kr])
+                                        translate([-kr - inset - eps, -kr])
-                                            square(1);
+                                            square([eps, t]);
                                     }
                                     teardrop_plus(r = pr + (female ? gap : 0), h = 0);
                                 }

printed/printed_box.scad

@@ -32,8 +32,8 @@ use <../vitamins/washer.scad>
 use <../vitamins/insert.scad>
 use <foot.scad>
 
-function pbox(name, wall, top_t, base_t, radius, size, foot = false, screw = false, ridges = [0, 0]) //! Construct a printed box property list
+function pbox(name, wall, top_t, base_t, radius, size, foot = false, screw = false, short_insert = false, ridges = [0, 0]) //! Construct a printed box property list
-    = concat([name, wall, top_t, base_t, foot, screw, radius, ridges], size);
+    = concat([name, wall, top_t, base_t, foot, screw, short_insert, radius, ridges], size);
 
 function pbox_name(type)       = type[0]; //! Name to allow more than one box in a project
 function pbox_wall(type)       = type[1]; //! Wall thickness
@@ -41,11 +41,12 @@ function pbox_top(type)        = type[2]; //! Top thickness
 function pbox_base(type)       = type[3]; //! Base thickness, can be zero for no base
 function pbox_foot(type)       = type[4]; //! Printed foot, can be false to suppress feet
 function pbox_base_screw(type) = type[5]; //! Screw type if no feet
-function pbox_radius(type)     = type[6]; //! Internal corner radius
+function pbox_short_insert(type)=type[6]; //! Use short inserts
-function pbox_ridges(type)     = type[7]; //! Ridge wavelength and amplitude
+function pbox_radius(type)     = type[7]; //! Internal corner radius
-function pbox_width(type)      = type[8]; //! Internal width
+function pbox_ridges(type)     = type[8]; //! Ridge wavelength and amplitude
-function pbox_depth(type)      = type[9]; //! Internal depth
+function pbox_width(type)      = type[9]; //! Internal width
-function pbox_height(type)     = type[10]; //! Internal height
+function pbox_depth(type)      = type[10]; //! Internal depth
+function pbox_height(type)     = type[11]; //! Internal height
 
 base_outset = 1;    // How much the base overlaps the inner dimensions
 base_overlap = 2;   // The width of ledge the base sits on
@@ -63,12 +64,12 @@ function pbox_total_height(type) =  //! Total height including base overlap
 function pbox_screw(type) =         //! Foot screw if got feet else base_screw
     let(foot = pbox_foot(type)) foot ? foot_screw(foot) : pbox_base_screw(type);
 
-function pbox_insert(type) = screw_insert(pbox_screw(type)); //! The insert for the base screws
+function pbox_insert(type) = screw_insert(pbox_screw(type), short = pbox_short_insert(type)); //! The insert for the base screws
 function pbox_washer(type) = screw_washer(pbox_screw(type)); //! The washer for the base screws
 
 function pbox_screw_length(type, panel_thickness = 0) =  //! Length of the base screw
     let(foot = pbox_foot(type), screw = pbox_screw(type))
-        screw_length(screw, pbox_base(type) + (foot ? foot_thickness(foot) : panel_thickness), 1, true);
+        screw_length(screw, pbox_base(type) + (foot ? foot_thickness(foot) : panel_thickness), 1,  pbox_insert(type));
 
 function pbox_mid_offset(type) = pbox_ridges(type).y + pbox_wall(type) / 2; // Offset to wall midpoint
 

printed/screw_knob.scad

@@ -44,7 +44,7 @@ function knob_height(type) = //! Total height of the knob
         screw_knob_stem_h(type) + screw_knob_flange_t(type);
 
 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 compatability
+    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));

readme.md

@@ -371,7 +371,7 @@ Individual teeth are not drawn, instead they are represented by a lighter colour
 |   1 | `belt(T2p5x6, [ ... ])` |  Belt T2.5 x 6mm x 130mm |
 |   1 | `belt(T5x10, [ ... ])` |  Belt T5 x 10mm x 130mm |
 |   1 | `belt(T5x6, [ ... ])` |  Belt T5 x 6mm x 130mm |
-|   2 | `insert(F1BM3)` |  Heatfit insert M3 |
+|   2 | `insert(F1BM3)` |  Heatfit insert M3 x 5.8mm |
 |   2 | `pulley(GT2x16_toothed_idler)` |  Pulley GT2 idler 16 teeth |
 |   4 | `pulley(GT2x20_toothed_idler)` |  Pulley GT2 idler 20 teeth |
 |   6 | `pulley(GT2x16_plain_idler)` |  Pulley GT2 idler smooth 9.63mm |
@@ -1528,10 +1528,14 @@ Heatfit threaded inserts. Can be pushed into thermoplastics using a soldering ir
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|   1 | `insert(F1BM2)` |  Heatfit insert M2 |
+|   2 | `insert(F1BM2)` |  Heatfit insert M2 x 4mm |
-|   1 | `insert(F1BM2p5)` |  Heatfit insert M2.5 |
+|   1 | `insert(CNCKM2p5)` |  Heatfit insert M2.5 x 4mm |
-|   1 | `insert(F1BM3)` |  Heatfit insert M3 |
+|   1 | `insert(F1BM2p5)` |  Heatfit insert M2.5 x 5.8mm |
-|   1 | `insert(F1BM4)` |  Heatfit insert M4 |
+|   1 | `insert(CNCKM3)` |  Heatfit insert M3 x 3mm |
+|   1 | `insert(F1BM3)` |  Heatfit insert M3 x 5.8mm |
+|   1 | `insert(CNCKM4)` |  Heatfit insert M4 x 4mm |
+|   1 | `insert(F1BM4)` |  Heatfit insert M4 x 8.2mm |
+|   2 | `insert(CNCKM5)` |  Heatfit insert M5 x 5.8mm |
 
 
 <a href="#top">Top</a>
@@ -1646,6 +1650,16 @@ Nuts for leadscrews.
 | `leadnut_od(type)` | Outer diameter of the shank |
 | `leadnut_pitch(type)` | Screw pitch |
 | `leadnut_screw(type)` | The type of the fixing screws |
+| `leadnuthousing_height(type)` | Height of housing |
+| `leadnuthousing_hole_pos(type)` | Offset from center for nut hole |
+| `leadnuthousing_length(type)` | Length of housing |
+| `leadnuthousing_mount_screw(type)` | Mounting screw |
+| `leadnuthousing_mount_screw_len(type)` | Mounting screw length |
+| `leadnuthousing_nut(type)` | Nut type this is suitable for |
+| `leadnuthousing_nut_screw_length(type)` | Length of mounting screw for nut |
+| `leadnuthousing_screw_dist_l(type)` | Distance between mounting holes length |
+| `leadnuthousing_screw_dist_w(type)` | Distance between mounting holes width |
+| `leadnuthousing_width(type)` | Width of housing |
 
 ### Functions
 | Function | Description |
@@ -1657,15 +1671,21 @@ Nuts for leadscrews.
 |:--- |:--- |
 | `leadnut(type)` | Draw specified leadnut |
 | `leadnut_screw_positions(type)` | Position children at the screw holes |
+| `leadnuthousing(type)` | Nut housing, to connect a lead nut to another object |
+| `leadnuthousing_nut_position(type)` | The position of the nut may be off-center, use this to get the position |
+| `leadnuthousing_nut_screw_positions(type)` | get screw positions to mount the nut to the nut housing |
+| `leadnuthousing_screw_positions(type)` | Get screw positions to mount the leadnut housing |
 
 ![leadnuts](tests/png/leadnuts.png)
 
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|   1 | `leadnut(LSN8x2)` |  Leadscrew nut 8 x 2 |
+|   1 | `nuthousing(LNHT8x2)` |  Lead Screw Nut Housing T8 |
+|   2 | `leadnut(LSN8x2)` |  Leadscrew nut 8 x 2 |
 |   1 | `leadnut(LSN8x8)` |  Leadscrew nut 8 x 8 RobotDigg |
 |   1 | `leadnut(SFU1610)` |  Leadscrew nut for SFU1610 |
+|   4 | `screw(M3_cap_screw, 15)` |  Screw M3 cap x 15mm |
 
 
 <a href="#top">Top</a>
@@ -2585,6 +2605,7 @@ PCBs and perfboard with optional components. The shape can be a rectangle with o
 |   1 | `pcb(ExtruderPCB)` |  Extruder connection PCB - not shown |
 |   1 | `pcb(KY_040)` |  KY-040 rotart encoder breakout |
 |   1 | `pcb(Keyes5p1)` |  Keyes5.1 Arduino Uno expansion board - not shown |
+|   1 | `pcb(L9110S)` |  L9110S 2-Channel motor driver module |
 |   1 | `pcb(LIPO_fuel_gauge)` |  LIPO fuel gauge |
 |   1 | `pcb(MP1584EN)` |  MP1584EN 3A buck converter |
 |   1 | `pcb(MT3608)` |  MT3608 boost converter module |
@@ -2595,7 +2616,7 @@ PCBs and perfboard with optional components. The shape can be a rectangle with o
 |   1 | `molex_254(3)` |  Molex KK header 3 way - not shown |
 |  20 | `nut(M2_nut, nyloc = true)` |  Nut M2 x 1.6mm nyloc |
 |  30 | `nut(M2p5_nut, nyloc = true)` |  Nut M2.5 x 2.2mm nyloc |
-|  32 | `nut(M3_nut, nyloc = true)` |  Nut M3 x 2.4mm nyloc |
+|  36 | `nut(M3_nut, nyloc = true)` |  Nut M3 x 2.4mm nyloc |
 |   8 | `nut(M4_nut, nyloc = true)` |  Nut M4 x 3.2mm nyloc |
 |   1 | `pcb(PI_IO)` |  PI_IO V2 - not shown |
 |   1 | `pcb(PSU12V1A)` |  PSU 12V 1A - not shown |
@@ -2618,10 +2639,12 @@ PCBs and perfboard with optional components. The shape can be a rectangle with o
 |   8 | `screw(M2p5_cap_screw, 30)` |  Screw M2.5 cap x 30mm |
 |   4 | `screw(M2p5_pan_screw, 20)` |  Screw M2.5 pan x 20mm |
 |   8 | `screw(M2p5_pan_screw, 25)` |  Screw M2.5 pan x 25mm |
-|  10 | `screw(M3_cap_screw, 16)` |  Screw M3 cap x 16mm |
+|   8 | `screw(M3_cap_screw, 16)` |  Screw M3 cap x 16mm |
-|  13 | `screw(M3_cap_screw, 30)` |  Screw M3 cap x 30mm |
+|   6 | `screw(M3_cap_screw, 20)` |  Screw M3 cap x 20mm |
-|   9 | `screw(M3_cap_screw, 35)` |  Screw M3 cap x 35mm |
+|   8 | `screw(M3_cap_screw, 30)` |  Screw M3 cap x 30mm |
-|   8 | `screw(M4_cap_screw, 35)` |  Screw M4 cap x 35mm |
+|  14 | `screw(M3_cap_screw, 35)` |  Screw M3 cap x 35mm |
+|   4 | `screw(M4_cap_screw, 35)` |  Screw M4 cap x 35mm |
+|   4 | `screw(M4_cap_screw, 40)` |  Screw M4 cap x 40mm |
 |   1 | `pcb(XIAO)` |  Seeeduino XIAO |
 |   1 | `pcb(TP4056)` |  TP4056 Li-lon Battery charger module |
 |   3 | `terminal_35(2)` |  Terminal block 2 way 3.5mm - not shown |
@@ -2630,34 +2653,37 @@ PCBs and perfboard with optional components. The shape can be a rectangle with o
 |   1 | `pcb(WD2002SJ)` |  WD2002SJ Buck Boost DC-DC converter |
 |  20 | `washer(M2_washer)` |  Washer  M2 x 5mm x 0.3mm |
 |  30 | `washer(M2p5_washer)` |  Washer  M2.5 x 5.9mm x 0.5mm |
-|  32 | `washer(M3_washer)` |  Washer  M3 x 7mm x 0.5mm |
+|  36 | `washer(M3_washer)` |  Washer  M3 x 7mm x 0.5mm |
 |   8 | `washer(M4_washer)` |  Washer  M4 x 9mm x 0.8mm |
 |   1 | `pcb(ZC_A0591)` |  ZC-A0591 ULN2003 driver PCB |
 
 ### Printed
 | Qty | Filename |
 | ---:|:--- |
-|   8 | pcb_spacer20100.stl |
+|   4 | pcb_spacer20100.stl |
+|   4 | pcb_spacer20110.stl |
 |   4 | pcb_spacer2070.stl |
 |   4 | pcb_spacer2080.stl |
 |   4 | pcb_spacer2090.stl |
-|   4 | pcb_spacer25120.stl |
 |   4 | pcb_spacer25130.stl |
-|   4 | pcb_spacer25140_2.stl |
+|   4 | pcb_spacer25140.stl |
 |   4 | pcb_spacer25150_2.stl |
-|   4 | pcb_spacer25170.stl |
+|   4 | pcb_spacer25160_2.stl |
 |   4 | pcb_spacer25180.stl |
+|   4 | pcb_spacer25190.stl |
 |   2 | pcb_spacer2550.stl |
-|   4 | pcb_spacer2580.stl |
+|   4 | pcb_spacer2590.stl |
-|   4 | pcb_spacer30160.stl |
+|   4 | pcb_spacer30170.stl |
-|   4 | pcb_spacer30190.stl |
+|   4 | pcb_spacer30200.stl |
-|   5 | pcb_spacer30200.stl |
 |   5 | pcb_spacer30210.stl |
-|   4 | pcb_spacer30220.stl |
+|   5 | pcb_spacer30220.stl |
+|   4 | pcb_spacer30230.stl |
 |   4 | pcb_spacer3050.stl |
-|   6 | pcb_spacer3060.stl |
+|   4 | pcb_spacer3060.stl |
-|   4 | pcb_spacer40230.stl |
+|   2 | pcb_spacer3070.stl |
+|   4 | pcb_spacer3080.stl |
 |   4 | pcb_spacer40240.stl |
+|   4 | pcb_spacer40250.stl |
 
 
 <a href="#top">Top</a>
@@ -3307,6 +3333,7 @@ For an explanation of `screw_polysink()` see <https://hydraraptor.blogspot.com/2
 |:--- |:--- |
 | `screw_boss_diameter(type)` | Boss big enough for nut trap and washer |
 | `screw_head_depth(type, d = 0)` | How far a counter sink head will go into a straight hole diameter d |
+| `screw_insert(screw, short = false, i = 0)` | Find insert to fit specified screw, defaults to longest but can specify the shortest |
 | `screw_length(screw, thickness, washers, insert = false, nyloc = false, nut = false, longer = false)` | Returns the length of the longest or shortest screw that will got through `thickness` and `washers` and possibly an `insert`, `nut` or `nyloc` |
 | `screw_longer_than(x)` | Returns the length of the shortest screw length longer or equal to x |
 | `screw_nut_radius(type)` | Radius of matching nut |
@@ -3470,6 +3497,7 @@ Shaft couplings
 | `sc_diameter(type)` | Coupling outer diameter |
 | `sc_diameter1(type)` | Diameter of smaller shaft |
 | `sc_diameter2(type)` | Diameter of larger shaft |
+| `sc_flexible(type)` | Flexible coupling |
 | `sc_length(type)` | Coupling length |
 
 ### Modules
@@ -3483,6 +3511,7 @@ Shaft couplings
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
 |   1 | `shaft_coupling(SC_5x8_rigid)` |  Shaft coupling SC_5x8_rigid |
+|   1 | `shaft_coupling(SC_6x8_flex)` |  Shaft coupling SC_6x8_flex |
 
 
 <a href="#top">Top</a>
@@ -4573,7 +4602,7 @@ The top bezel can have an optional child, which is subtracted to allow modificat
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|   8 | `insert(F1BM3)` |  Heatfit insert M3 |
+|   8 | `insert(F1BM3)` |  Heatfit insert M3 x 5.8mm |
 |   4 | `screw(M3_dome_screw, 16)` |  Screw M3 dome x 16mm |
 |   4 | `screw(M3_dome_screw, 20)` |  Screw M3 dome x 20mm |
 |   2 | `sheet(DiBond, 143, 63, 1)` |  Sheet DiBond 143mm x 63mm x 3mm |
@@ -4677,7 +4706,7 @@ fixing_blocks along the sides.
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|  60 | `insert(F1BM3)` |  Heatfit insert M3 |
+|  60 | `insert(F1BM3)` |  Heatfit insert M3 x 5.8mm |
 |  44 | `screw(M3_dome_screw, 10)` |  Screw M3 dome x 10mm |
 |   4 | `screw(M3_dome_screw, 12)` |  Screw M3 dome x 12mm |
 |  12 | `screw(M3_dome_screw, 16)` |  Screw M3 dome x 16mm |
@@ -4923,42 +4952,42 @@ high lateral rigidity is not required.
 ### Functions
 | Function | Description |
 |:--- |:--- |
-| `2screw_block_h_hole(screw = def_screw)` | Transform to front hole |
+| `2screw_block_h_hole(screw = def_screw, short_insert = false)` | Transform to front hole |
-| `2screw_block_holes(screw)` | List of transforms to both holes |
+| `2screw_block_holes(screw, short_insert = false)` | List of transforms to both holes |
-| `2screw_block_v_hole(screw = def_screw)` | Transform to bottom hole |
+| `2screw_block_v_hole(screw = def_screw, short_insert = false)` | Transform to bottom hole |
-| `2screw_block_width(screw = def_screw)` | 2 screw block width is narrower, height and depth are as corner_block |
+| `2screw_block_width(screw = def_screw, short_insert = false)` | 2 screw block width is narrower, height and depth are as corner_block |
-| `corner_block_h_holes(screw = def_screw)` | List of transforms to side holes |
+| `corner_block_h_holes(screw = def_screw, short_insert = false)` | List of transforms to side holes |
-| `corner_block_hole_offset(screw = def_screw)` | Hole offset from the edge |
+| `corner_block_hole_offset(screw = def_screw, short_insert = false)` | Hole offset from the edge |
-| `corner_block_holes(screw)` | List of transforms to all holes |
+| `corner_block_holes(screw, short_insert = false)` | List of transforms to all holes |
 | `corner_block_screw()` | Default screw type |
-| `corner_block_v_hole(screw = def_screw)` | Transform to bottom hole |
+| `corner_block_v_hole(screw = def_screw, short_insert = false)` | Transform to bottom hole |
-| `corner_block_width(screw = def_screw)` | Block width, depth and height |
+| `corner_block_width(screw = def_screw, short_insert = false)` | Block width, depth and height |
 
 ### Modules
 | Module | Description |
 |:--- |:--- |
-| `2screw_block(screw = def_screw, name = false)` | Generate the STL for a printed 2screw block |
+| `2screw_block(screw = def_screw, name = false, short_insert = false)` | Generate the STL for a printed 2screw block |
-| `2screw_block_assembly(screw = def_screw, name = false)` | The printed block with inserts |
+| `2screw_block_assembly(screw = def_screw, name = false, short_insert = false)` | The printed block with inserts |
-| `2screw_block_h_hole(screw = def_screw)` | Place children at the front screw hole |
+| `2screw_block_h_hole(screw = def_screw, short_insert = false)` | Place children at the front screw hole |
-| `2screw_block_holes(screw = def_screw)` | Place children at both screw holes |
+| `2screw_block_holes(screw = def_screw, short_insert = false)` | Place children at both screw holes |
-| `2screw_block_v_hole(screw = def_screw)` | Place children at the bottom screw hole |
+| `2screw_block_v_hole(screw = def_screw, short_insert = false)` | Place children at the bottom screw hole |
-| `corner_block(screw = def_screw, name = false)` | Generate the STL for a printed corner block |
+| `corner_block(screw = def_screw, name = false, short_insert = false)` | Generate the STL for a printed corner block |
-| `corner_block_assembly(screw = def_screw, name = false)` | The printed block with inserts |
+| `corner_block_assembly(screw = def_screw, name = false, short_insert = false)` | The printed block with inserts |
-| `corner_block_h_holes(screw = def_screw, index = undef)` | Place children at the side screw holes |
+| `corner_block_h_holes(screw = def_screw, index = undef, short_insert = false)` | Place children at the side screw holes |
-| `corner_block_holes(screw = def_screw)` | Place children at all the holes |
+| `corner_block_holes(screw = def_screw, short_insert = false)` | Place children at all the holes |
-| `corner_block_v_hole(screw = def_screw)` | Place children at the bottom screw hole |
+| `corner_block_v_hole(screw = def_screw, short_insert = false)` | Place children at the bottom screw hole |
-| `fastened_2screw_block_assembly(thickness, screw = def_screw, thickness_below = undef, name = false, show_block = true, star_washers = true)` | Printed block with fasteners |
+| `fastened_2screw_block_assembly(thickness, screw = def_screw, thickness_below = undef, name = false, show_block = true, star_washers = true, short_insert = false)` | Printed block with fasteners |
-| `fastened_corner_block_assembly(thickness, screw = def_screw, thickness_below = undef, thickness_side2 = undef, name = false, show_block = true, star_washers = true)` | Printed block with all fasteners |
+| `fastened_corner_block_assembly(thickness, screw = def_screw, thickness_below = undef, thickness_side2 = undef, name = false, show_block = true, star_washers = true, short_insert = false)` | Printed block with all fasteners |
 
 ![corner_block](tests/png/corner_block.png)
 
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|   5 | `insert(F1BM2)` |  Heatfit insert M2 |
+|   5 | `insert(F1BM2)` |  Heatfit insert M2 x 4mm |
-|   5 | `insert(F1BM2p5)` |  Heatfit insert M2.5 |
+|   5 | `insert(F1BM2p5)` |  Heatfit insert M2.5 x 5.8mm |
-|   5 | `insert(F1BM3)` |  Heatfit insert M3 |
+|   5 | `insert(F1BM3)` |  Heatfit insert M3 x 5.8mm |
-|   5 | `insert(F1BM4)` |  Heatfit insert M4 |
+|   5 | `insert(F1BM4)` |  Heatfit insert M4 x 8.2mm |
 |   5 | `screw(M2_cap_screw, 8)` |  Screw M2 cap x  8mm |
 |   5 | `screw(M2p5_pan_screw, 10)` |  Screw M2.5 pan x 10mm |
 |   5 | `screw(M3_dome_screw, 10)` |  Screw M3 dome x 10mm |
@@ -5247,10 +5276,10 @@ Star washers can be omitted by setting `star_washers` to false.
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|   3 | `insert(F1BM2)` |  Heatfit insert M2 |
+|   3 | `insert(F1BM2)` |  Heatfit insert M2 x 4mm |
-|   3 | `insert(F1BM2p5)` |  Heatfit insert M2.5 |
+|   3 | `insert(F1BM2p5)` |  Heatfit insert M2.5 x 5.8mm |
-|   3 | `insert(F1BM3)` |  Heatfit insert M3 |
+|   3 | `insert(F1BM3)` |  Heatfit insert M3 x 5.8mm |
-|   3 | `insert(F1BM4)` |  Heatfit insert M4 |
+|   3 | `insert(F1BM4)` |  Heatfit insert M4 x 8.2mm |
 |   3 | `screw(M2_cap_screw, 8)` |  Screw M2 cap x  8mm |
 |   3 | `screw(M2p5_pan_screw, 10)` |  Screw M2.5 pan x 10mm |
 |   3 | `screw(M3_dome_screw, 10)` |  Screw M3 dome x 10mm |
@@ -5397,7 +5426,7 @@ inserts don't grip well in rubber.
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|   1 | `insert(F1BM3)` |  Heatfit insert M3 |
+|   1 | `insert(F1BM3)` |  Heatfit insert M3 x 5.8mm |
 |   1 | `nut(M4_nut, nyloc = true)` |  Nut M4 x 3.2mm nyloc |
 |   1 | `screw(M3_cap_screw, 8)` |  Screw M3 cap x  8mm |
 |   1 | `screw(M4_cap_screw, 16)` |  Screw M4 cap x 16mm |
@@ -5450,7 +5479,7 @@ Printed handle that can be printed without needing support material due to its t
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|   2 | `insert(F1BM4)` |  Heatfit insert M4 |
+|   2 | `insert(F1BM4)` |  Heatfit insert M4 x 8.2mm |
 |   2 | `screw(M4_cap_screw, 16)` |  Screw M4 cap x 16mm |
 |   2 | `washer(M4_washer)` |  Washer  M4 x 9mm x 0.8mm |
 |   2 | `star_washer(M4_washer)` |  Washer star M4 x 0.8mm |
@@ -5682,6 +5711,7 @@ It can also have printed feet on the base with the screws doubling up to hold th
 | `pbox_name(type)` | Name to allow more than one box in a project |
 | `pbox_radius(type)` | Internal corner radius |
 | `pbox_ridges(type)` | Ridge wavelength and amplitude |
+| `pbox_short_insert(type)` | Use short inserts |
 | `pbox_top(type)` | Top thickness |
 | `pbox_wall(type)` | Wall thickness |
 | `pbox_width(type)` | Internal width |
@@ -5689,7 +5719,7 @@ It can also have printed feet on the base with the screws doubling up to hold th
 ### Functions
 | Function | Description |
 |:--- |:--- |
-| `pbox(name, wall, top_t, base_t, radius, size, foot = false, screw = false, ridges = [0, 0])` | Construct a printed box property list |
+| `pbox(name, wall, top_t, base_t, radius, size, foot = false, screw = false, short_insert = false, ridges = [0, 0])` | Construct a printed box property list |
 | `pbox_inclusion(type)` | How far the ledge for the base extends inwards |
 | `pbox_insert(type)` | The insert for the base screws |
 | `pbox_screw(type)` | Foot screw if got feet else base_screw |
@@ -5713,8 +5743,8 @@ It can also have printed feet on the base with the screws doubling up to hold th
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|   4 | `insert(F1BM2)` |  Heatfit insert M2 |
+|   4 | `insert(F1BM2)` |  Heatfit insert M2 x 4mm |
-|   4 | `insert(F1BM3)` |  Heatfit insert M3 |
+|   4 | `insert(F1BM3)` |  Heatfit insert M3 x 5.8mm |
 |   4 | `screw(M2_cap_screw, 6)` |  Screw M2 cap x  6mm |
 |   3 | `screw(M3_pan_screw, 6)` |  Screw M3 pan x  6mm |
 |   4 | `screw(M3_pan_screw, 10)` |  Screw M3 pan x 10mm |
@@ -5843,7 +5873,7 @@ The stl and assembly must be given a name and parameterless wrappers for the stl
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|   6 | `insert(F1BM3)` |  Heatfit insert M3 |
+|   6 | `insert(F1BM3)` |  Heatfit insert M3 x 5.8mm |
 |   6 | `screw(M3_cap_screw, 10)` |  Screw M3 cap x 10mm |
 |   6 | `washer(M3_washer)` |  Washer  M3 x 7mm x 0.5mm |
 |   6 | `star_washer(M3_washer)` |  Washer star M3 x 0.5mm |
@@ -5899,8 +5929,8 @@ Clamp for ribbon cable and polypropylene strip or one or more ribbon cables.
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|   2 | `insert(F1BM2)` |  Heatfit insert M2 |
+|   2 | `insert(F1BM2)` |  Heatfit insert M2 x 4mm |
-|   2 | `insert(F1BM3)` |  Heatfit insert M3 |
+|   2 | `insert(F1BM3)` |  Heatfit insert M3 x 5.8mm |
 |   1 |  |  Ribbon cable 20 way 100mm |
 |   1 |  |  Ribbon cable 8 way 100mm |
 |   2 | `screw(M2_dome_screw, 8)` |  Screw M2 dome x  8mm |
@@ -6018,7 +6048,7 @@ UK 13A socket and printed backbox with earth terminal for the panel it is mounte
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|   4 | `insert(F1BM3)` |  Heatfit insert M3 |
+|   4 | `insert(F1BM3)` |  Heatfit insert M3 x 5.8mm |
 |   1 | `mains_socket(Contactum)` |  Mains socket 13A |
 |   1 | `mains_socket(MKLOGIC)` |  Mains socket 13A, switched |
 |   2 | `nut(M3_nut, nyloc = true)` |  Nut M3 x 2.4mm nyloc |
@@ -6075,7 +6105,7 @@ The STL and assembly must be given a name and parameterless wrappers for the stl
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|   4 | `insert(F1BM3)` |  Heatfit insert M3 |
+|   4 | `insert(F1BM3)` |  Heatfit insert M3 x 5.8mm |
 |   4 | `screw(M3_cap_screw, 10)` |  Screw M3 cap x 10mm |
 |   4 | `washer(M3_washer)` |  Washer  M3 x 7mm x 0.5mm |
 |   4 | `star_washer(M3_washer)` |  Washer star M3 x 0.5mm |
@@ -6137,7 +6167,7 @@ be fully customised by passing a list of properties.
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|   2 | `insert(F1BM3)` |  Heatfit insert M3 |
+|   2 | `insert(F1BM3)` |  Heatfit insert M3 x 5.8mm |
 |   2 | `screw(M3_pan_screw, 8)` |  Screw M3 pan x  8mm |
 |   2 | `washer(M3_penny_washer)` |  Washer penny  M3 x 12mm x 0.8mm |
 |   2 | `star_washer(M3_washer)` |  Washer star M3 x 0.5mm |
@@ -6714,7 +6744,7 @@ Each vertex, apart from the first and the last, has an associated radius and the
 | `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
@@ -6859,7 +6889,7 @@ The `pose()` module allows assembly views in the readme to be posed differently
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|   1 | `insert(F1BM3)` |  Heatfit insert M3 |
+|   1 | `insert(F1BM3)` |  Heatfit insert M3 x 5.8mm |
 |   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 |
@@ -6912,6 +6942,7 @@ Original version by Doug Moen on the OpenSCAD forum
 <a name="Global"></a>
 ## Global
 Global constants, functions and modules. This file is used directly or indirectly in every scad file.
+See [global_defs.scad](../../global_defs.scad) for a list of global constants.
 
 [utils/core/global.scad](utils/core/global.scad) Implementation.
 
@@ -6924,6 +6955,7 @@ Global constants, functions and modules. This file is used directly or indirectl
 | `cm(x)` | cm to mm conversion |
 | `echoit(x)` | Echo expression and return it, useful for debugging |
 | `foot(x)` | Foot to mm conversion |
+| `grey(n)` | Generate a shade of grey to pass to color(). |
 | `in(list, x)` | Returns true if `x` is an element in the `list` |
 | `inch(x)` | Inch to mm conversion (For fractional inches, 'inch(1 + 7/8)' will work as expected.) |
 | `limit(x, min, max)` | Force x in range min <= x <= max |
@@ -6932,6 +6964,7 @@ Global constants, functions and modules. This file is used directly or indirectl
 | `no_point(str)` | Replace decimal point in string with 'p' |
 | `r2sides(r)` | Replicates the OpenSCAD logic to calculate the number of sides from the radius |
 | `r2sides4n(r)` | Round up the number of sides to a multiple of 4 to ensure points land on all axes |
+| `round_to_layer(z)` | Round up to a layer boundary using `layer_height0` for the first layer and `layer_height` for subsequent layers. |
 | `slice(list, start = 0, end = undef)` | Slice a list or string with Python type semantics |
 | `sqr(x)` | Returns the square of `x` |
 | `yard(x)` | Yard to mm conversion |

scripts/tests.py

@@ -47,7 +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):

tests/inserts.scad

@@ -24,9 +24,15 @@ include <../vitamins/inserts.scad>
 module inserts() {
 
     for(i = [0: len(inserts) -1])
-        translate([10 * i, 0])
+        translate([10 * i, 5])
             insert(inserts[i]);
 
+    for(i = [0: len(short_inserts) -1])
+        translate([10 * i, -5])
+            insert(short_inserts[i]);
+
+
+
     stl_colour(pp1_colour)
         translate([len(inserts) * 10, 0]) {
             insert_lug(inserts[0], 2, 1);

tests/leadnuts.scad

@@ -25,6 +25,26 @@ module leadnuts()
     layout([for(n = leadnuts) leadnut_flange_dia(n)], 5)
         leadnut(leadnuts[$i]);
 
+module leadnuthousings()
+    layout([for(n = leadnuthousings) leadnuthousing_width(n)], 5) {
+        rotate([0,0,270]) {
+            leadnuthousing(leadnuthousings[$i]);
+            explode(15)
+                leadnuthousing_nut_position(leadnuthousings[$i])
+                    leadnut(leadnuthousing_nut(leadnuthousings[$i]));
+            explode(17 + leadnuthousing_nut_screw_length(leadnuthousings[$i]))
+                translate_z(leadnuthousing_height(leadnuthousings[$i])/2)
+                    leadnuthousing_nut_screw_positions(leadnuthousings[$i])
+                        screw(leadnut_screw(
+                            leadnuthousing_nut(leadnuthousings[$i])),
+                            leadnuthousing_nut_screw_length(leadnuthousings[$i])
+                        );
+        }
+    }
+
 if($preview)
-    let($show_threads = true)
+    let($show_threads = true) {
         leadnuts();
+        translate([0,50,0])
+            leadnuthousings();
+    }

utils/core/global.scad

@@ -19,6 +19,7 @@
 
 //
 //! Global constants, functions and modules. This file is used directly or indirectly in every scad file.
+//! See [global_defs.scad](../../global_defs.scad) for a list of global constants.
 //
 include <../../global_defs.scad>
 
@@ -38,6 +39,13 @@ function r2sides(r) = $fn ? $fn : ceil(max(min(360/ $fa, r * 2 * PI / $fs), 5));
 function r2sides4n(r) = floor((r2sides(r) + 3) / 4) * 4;                            //! Round up the number of sides to a multiple of 4 to ensure points land on all axes
 function limit(x, min, max) = max(min(x, max), min);                                //! Force x in range min <= x <= max
 
+function round_to_layer(z) =  //! Round up to a layer boundary using `layer_height0` for the first layer and `layer_height` for subsequent layers.
+    z <= 0 ? 0 :
+    z <= layer_height0 ? layer_height0 :
+    ceil((z -layer_height0) / layer_height) * layer_height + layer_height0;
+
+function grey(n) = [0.01, 0.01, 0.01] * n;                                          //! Generate a shade of grey to pass to color().
+
 module translate_z(z)                                                               //! Shortcut for Z only translations
     translate([0, 0, z]) children();
 

utils/sweep.scad

@@ -239,7 +239,7 @@ 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)
     ) [for(i = [0 : n - 1]) let(initial = [r, 0, 0, 1] * rotate(start_angle + i * 360 / n)) [for(t = transforms) initial * t]];

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 <rod.scad>
-use <NopSCADlib/utils/thread.scad>
+use <../utils/thread.scad>
-use <NopSCADlib/utils/tube.scad>
+use <../utils/tube.scad>
 
 
 function BLDC_diameter(type)                    = type[1]; //! Diameter of motor

vitamins/insert.scad

@@ -53,7 +53,7 @@ module insert(type) { //! Draw specified insert
     ring2_h = ring1_h + chamfer1;
     gap = (length - ring1_h - ring2_h - chamfer2) / 3;
 
-    vitamin(str("insert(", type[0], "): Heatfit insert M", insert_screw_diameter(type)));
+    vitamin(str("insert(", type[0], "): Heatfit insert M", insert_screw_diameter(type), " x ", length, "mm"));
     $fn = 64;
     thread_d = insert_screw_diameter(type);
     explode(20, offset = [0, 0, -5]) translate_z(eps) vflip() {

vitamins/inserts.scad

@@ -34,6 +34,13 @@ F1BM2p5 = [ "F1BM2p5", 5.8, 4.6, 4.0, 2.5, 3.65, 1.6, 4.4, 3.9 ];
 F1BM3   = [ "F1BM3",   5.8, 4.6, 4.0, 3,   3.65, 1.6, 4.4, 3.9 ];
 F1BM4   = [ "F1BM4",   8.2, 6.3, 5.6, 4,   5.15, 2.3, 6.0, 5.55 ];
 
-inserts = [ F1BM2, F1BM2p5, F1BM3, F1BM4 ];
+CNCKM2p5 =[ "CNCKM2p5",4.0, 4.6, 4.0, 2.5, 3.65, 1.0, 4.4, 3.9 ];
+CNCKM3 =  [ "CNCKM3",  3.0, 4.6, 4.0, 3,   3.65, 0.7, 4.4, 3.9 ];
+CNCKM4 =  [ "CNCKM4",  4.0, 6.3, 5.6, 4,   5.15, 1.0, 6.0, 5.55];
+CNCKM5 =  [ "CNCKM5",  5.8, 7.1, 6.4, 5,   6.0,  1.6, 6.8, 6.33];
+
+
+inserts =       [ F1BM2, F1BM2p5,  F1BM3,  F1BM4,  CNCKM5 ];
+short_inserts = [ F1BM2, CNCKM2p5, CNCKM3, CNCKM4, CNCKM5 ];
 
 use <insert.scad>

vitamins/leadnut.scad

@@ -23,6 +23,7 @@
 include <../utils/core/core.scad>
 use <../utils/tube.scad>
 use <../utils/thread.scad>
+use <../vitamins/screw.scad>
 
 function leadnut_bore(type)          = type[2];     //! Thread size
 function leadnut_od(type)            = type[3];     //! Outer diameter of the shank
@@ -41,6 +42,17 @@ function leadnut_colour(type)        = type[15];    //! The colour
 
 function leadnut_shank(type)         = leadnut_height(type) - leadnut_flange_t(type) - leadnut_flange_offset(type); //! The length of the shank below the flange
 
+function leadnuthousing_length(type)            = type[2];  //! Length of housing
+function leadnuthousing_width(type)             = type[3];  //! Width of housing
+function leadnuthousing_height(type)            = type[4];  //! Height of housing
+function leadnuthousing_hole_pos(type)          = type[5];  //! Offset from center for nut hole
+function leadnuthousing_screw_dist_l(type)      = type[6];  //! Distance between mounting holes length
+function leadnuthousing_screw_dist_w(type)      = type[7];  //! Distance between mounting holes width
+function leadnuthousing_mount_screw(type)       = type[8];  //! Mounting screw
+function leadnuthousing_mount_screw_len(type)   = type[9];  //! Mounting screw length
+function leadnuthousing_nut(type)               = type[10]; //! Nut type this is suitable for
+function leadnuthousing_nut_screw_length(type)  = type[11]; //! Length of mounting screw for nut
+
 module leadnut_screw_positions(type) { //! Position children at the screw holes
     holes = leadnut_holes(type);
     flat = leadnut_flat(type);
@@ -87,3 +99,58 @@ module leadnut(type) { //! Draw specified leadnut
                     }
         }
 }
+
+module leadnuthousing_screw_positions(type) { //! Get screw positions to mount the leadnut housing
+    for(p = [[-1,-1], [1,-1], [1,1], [-1,1]])
+        translate([p.x * leadnuthousing_screw_dist_l(type)/2, p.y * leadnuthousing_screw_dist_w(type)/2, 0])
+            children();
+}
+module leadnuthousing_nut_position(type) { //! The position of the nut may be off-center, use this to get the position
+    translate([leadnuthousing_hole_pos(type),0, leadnuthousing_height(type)/2])
+        children();
+}
+
+module leadnuthousing_nut_screw_positions(type) { //! get screw positions to mount the nut to the nut housing
+    translate([leadnuthousing_hole_pos(type),0, 0])
+        leadnut_screw_positions(leadnuthousing_nut(type))
+            children();
+}
+
+module leadnuthousing(type) { //! Nut housing, to connect a lead nut to another object
+    vitamin(str("nuthousing(", type[0], "): ", type[1]));
+
+    leadnut = leadnuthousing_nut(type);
+    screw = leadnut_screw(leadnut);
+    d = screw_radius(screw) * 2;
+    p = metric_coarse_pitch(d);
+    sl = leadnuthousing_nut_screw_length(type);
+    ms = leadnuthousing_mount_screw(type);
+    msl = leadnuthousing_mount_screw_len(type);
+    md = screw_radius (ms) * 2;
+    mp = metric_coarse_pitch(md);
+
+    color("silver")
+        difference() {
+            cube([leadnuthousing_length(type), leadnuthousing_width(type), leadnuthousing_height(type)], center = true);
+            translate([leadnuthousing_hole_pos(type),0,0]) {
+                cylinder(d=leadnut_od(leadnut), h=leadnuthousing_length(type)+2, center=true);
+                translate_z(leadnut_flange_offset(leadnut))
+                    leadnut_screw_positions(leadnut)
+                cylinder(r=screw_radius(leadnut_screw(leadnut)), h=sl+1);
+            }
+
+            rotate([0,90,0])
+                leadnuthousing_screw_positions(type)
+                    cylinder(r=screw_radius(ms), h=msl+1);
+
+        }
+    if(show_threads) {
+        translate([leadnuthousing_hole_pos(type),0,leadnuthousing_height(type)/2 - sl/2 - leadnut_flange_t(leadnut)])
+            leadnut_screw_positions(leadnut)
+                female_metric_thread(d, p, sl, center = true, colour = silver);
+        rotate([0,90,0])
+            translate_z(msl/2)
+                leadnuthousing_screw_positions(type)
+                    female_metric_thread(md, mp, msl, center = true, colour = silver);
+    }
+}

vitamins/leadnuts.scad

@@ -29,5 +29,9 @@ LSN8x8  = ["LSN8x8",  "Leadscrew nut 8 x 8 RobotDigg", 8, 12.75,19, 25.4, 4.1, 0
 SFU1610 = ["SFU1610", "Leadscrew nut for SFU1610",    16, 28, 42.5, 48,    10, 0,   6, 6,   38/2,    M6_cap_screw, 5, 10, 40, "#DFDAC5"];
 
 leadnuts = [LSN8x2, LSN8x8, SFU1610];
+//                                                  L   W   H   Hole    Mounting screws (top)             Nut      Nut mount screw
+//                                                              Pos     Dist L Dist W Type             L            Length
+LNHT8x2 = [ "LNHT8x2", "Lead Screw Nut Housing T8", 30, 34, 30, -1,     20,    24,    M4_cs_cap_screw, 15, LSN8x2,  15 ];
+leadnuthousings = [LNHT8x2];
 
 use <leadnut.scad>

vitamins/pcbs.scad

@@ -908,9 +908,19 @@ KY_040 = ["KY_040", "KY-040 rotart encoder breakout",
     ],
     []];
 
+L9110S = ["L9110S", "L9110S 2-Channel motor driver module", 29.2, 23, 1.6, 0, 3, 0, "#2140BE", false, [[10.7, 2.3], [10.7, -2.3], [-5.3, 2.3], [-5.3, -2.3] ],
+    [
+        [ -1.3,  11.5,      0, "2p54header", 1, 6],
+        [  16, 9.5      ,   0, "smd_led", LED0805, "red"],
+        for(i = [-1, 1]) [ 4, 5.5*i, 180, "gterm508", 2],
+        for(i = [-1, 1]) [ 17.38, 3*i, 90, "smd_soic", SOIC8, "" ]
+    ],
+    []];
+
+
 tiny_pcbs = [XIAO, MP1584EN, TP4056, ESP_01, LIPO_fuel_gauge];
 
-pcbs = [RAMPSEndstop, KY_040, MT3608, ZC_A0591, ArduinoNano, RPI_Pico, ESP32_DOIT_V1, RPI0, EnviroPlus, ArduinoUno3, ArduinoLeonardo, WD2002SJ, RPI3, RPI4, BTT_RELAY_V1_2, BTT_SKR_MINI_E3_V2_0, BTT_SKR_E3_TURBO, BTT_SKR_V1_4_TURBO, DuetE, Duex5];
+pcbs = [RAMPSEndstop, MT3608, KY_040, L9110S, ZC_A0591, ArduinoNano, RPI_Pico, ESP32_DOIT_V1, RPI0, EnviroPlus, ArduinoUno3, ArduinoLeonardo, WD2002SJ, RPI3, RPI4, BTT_RELAY_V1_2, BTT_SKR_MINI_E3_V2_0, BTT_SKR_E3_TURBO, BTT_SKR_V1_4_TURBO, DuetE, Duex5];
 
 pcbs_not_shown = [Melzi, Duex2, PSU12V1A, Keyes5p1, PI_IO, ExtruderPCB];
 

vitamins/screw.scad

@@ -68,7 +68,7 @@ function screw_shorter_than(x) = x >= 20 ? floor(x / 5) * 5 : //! Returns the le
 
 function screw_length(screw, thickness, washers, insert = false, nyloc = false, nut = false, longer = false) = //! Returns the length of the longest or shortest screw that will got through `thickness` and `washers` and possibly an `insert`, `nut` or `nyloc`
     let(washer = washers ? washers * washer_thickness(screw_washer(screw)) : 0,
-        insert = insert ? insert_length(screw_insert(screw)) : 0,
+        insert = insert ? insert_length(is_list(insert) ? insert : screw_insert(screw)) : 0,
         nut = nut || nyloc ? nut_thickness(screw_nut(screw), nyloc)  : 0,
         total = thickness + washer + insert + nut
        )
@@ -76,10 +76,11 @@ function screw_length(screw, thickness, washers, insert = false, nyloc = false,
 
 function screw_smaller_than(d) = d >= 2.5 && d < 3 ? 2.5 : floor(d); // Largest diameter screw less than or equal to specified diameter
 
-function screw_insert(screw, i = 0) = let(d = screw_radius(screw) * 2)
+function screw_insert(screw, short = false, i = 0) =  //! Find insert to fit specified screw, defaults to longest but can specify the shortest
-     i >= len(inserts) ? undef
+    let(d = screw_radius(screw) * 2, list = short ? short_inserts : inserts)
-                       : insert_screw_diameter(inserts[i]) == d ? inserts[i]
+        i >= len(list) ? undef
-                                                                : screw_insert(screw, i + 1);
+                       : insert_screw_diameter(list[i]) == d ? list[i]
+                                                             : screw_insert(screw, short, i + 1);
 
 module screw(type, length, hob_point = 0, nylon = false) { //! Draw specified screw, optionally hobbed or nylon
     description = str("Screw ", nylon ? "Nylon " : "", type[1], length < 10 ? " x  " : " x ", length, "mm", hob_point ? str(", hobbed at ", hob_point) : "");

vitamins/shaft_coupling.scad

@@ -26,6 +26,7 @@ function sc_length(type)       = type[1]; //! Coupling length
 function sc_diameter(type)     = type[2]; //! Coupling outer diameter
 function sc_diameter1(type)    = type[3]; //! Diameter of smaller shaft
 function sc_diameter2(type)    = type[4]; //! Diameter of larger shaft
+function sc_flexible(type)     = type[5]; //! Flexible coupling
 
 module shaft_coupling(type, colour = "silver") { //! Draw the shaft coupling
     vitamin(str("shaft_coupling(", type[0], "): Shaft coupling ", type[0]));
@@ -34,6 +35,7 @@ module shaft_coupling(type, colour = "silver") { //! Draw the shaft coupling
     radius = sc_diameter(type) / 2;
     r1 = sc_diameter1(type) / 2;
     r2 = sc_diameter2(type) / 2;
+    flexible = is_undef(sc_flexible(type)) ? false : sc_flexible(type);
 
     grub_length = 3;
     module grub_screw_positions() {
@@ -54,6 +56,11 @@ module shaft_coupling(type, colour = "silver") { //! Draw the shaft coupling
 
                 tube(radius, r2, length / 2, false);
             }
+            if (flexible) {
+                linear_extrude(length/3, center=true, convexity = 20, twist = -5 * 360)
+                    translate([r1,0,0])
+                       square(radius-r1,1); 
+            }
             grub_screw_positions()
                 rotate([180, 0, 0])
                     cylinder(r = screw_radius(M3_grub_screw), h = 5);

vitamins/shaft_couplings.scad

@@ -21,9 +21,9 @@
 //! Shaft couplings
 //
 
-//                                   L   D        d1   d2
+//                                   L   D        d1   d2 flex?
-SC_5x8_rigid  = [ "SC_5x8_rigid",    25, 12.5,    5,   8 ];
+SC_5x8_rigid  = [ "SC_5x8_rigid",    25, 12.5,    5,   8, false ];
-
+SC_6x8_flex   = [ "SC_6x8_flex",     25, 19,      6,   8, true ];
-shaft_couplings = [SC_5x8_rigid];
+shaft_couplings = [SC_5x8_rigid, SC_6x8_flex];
 
 use <shaft_coupling.scad>