Updated readme and images

length calculations.

docs/usage.md

@@ -26,7 +26,7 @@ OpenSCAD has to be setup to find libraries by setting the ```OPENSCADPATH``` env
 in the directory it points to. This can be done with ```git clone https://github.com/nophead/NopSCADlib.git``` while in that directory or, if you don't want to use GIT,
 by downloading https://github.com/nophead/NopSCADlib/archive/master.zip and unzipping it to a directory called NopSCADlib.
 
-The ```NopSCADlib/scripts``` directory needs to be added to the executable search path.
+The ```NopSCADlib/scripts``` directory needs to be added to the executable search path, ```PATH``` on Windows and ```path``` on Linux and Mac.
 
 The installation can be tested by opening ```NopSCADlib/libtest.scad``` in the OpenSCAD GUI. It should render all the objects in the library in about 1 minute.
 

global_defs.scad

@@ -60,7 +60,8 @@ grey60                          = [0.6, 0.6, 0.6];
 grey70                          = [0.7, 0.7, 0.7];
 grey80                          = [0.8, 0.8, 0.8];
 grey90                          = [0.9, 0.9, 0.9];
-brass                           = [255/255, 215/255, 0/255];
+gold                            = [255/255, 215/255, 0/255];
+brass                           = [255/255, 220/255, 100/255];
 silver                          = [0.75, 0.75, 0.75];
 
 /*

lib.scad

@@ -63,6 +63,8 @@ include <vitamins/mains_sockets.scad>
 include <vitamins/ldrs.scad>
 include <vitamins/geared_steppers.scad>
 include <vitamins/extrusions.scad>
+include <vitamins/sk_brackets.scad>
+include <vitamins/scs_bearing_blocks.scad>
 
 use <vitamins/jack.scad>
 use <vitamins/meter.scad>

libtest.scad

@@ -254,7 +254,7 @@ buttons_y = spades_y + 40;
 jacks_y = buttons_y + 40;
 microswitches_y = jacks_y + 40;
 rockers_y = microswitches_y + 40;
-toggles_y = rockers_y + 40;
+toggles_y = rockers_y + 60;
 components_y = toggles_y + 40;
 
 translate([x2, leds_y])

readme.md

@@ -31,22 +31,23 @@ See [usage](docs/usage.md) for requirements, installation instructions and a usa
 <tr><td> <a href = "#Extrusions">Extrusions</a> </td><td> <a href = "#Rockers">Rockers</a> </td><td> <a href = "#Foot">Foot</a> </td><td> <a href = "#Rounded_cylinder">Rounded_cylinder</a> </td><td></td></tr>
 <tr><td> <a href = "#Fans">Fans</a> </td><td> <a href = "#Rod">Rod</a> </td><td> <a href = "#Handle">Handle</a> </td><td> <a href = "#Rounded_polygon">Rounded_polygon</a> </td><td></td></tr>
 <tr><td> <a href = "#Fuseholder">Fuseholder</a> </td><td> <a href = "#Screws">Screws</a> </td><td> <a href = "#Pcb_mount">Pcb_mount</a> </td><td> <a href = "#Sector">Sector</a> </td><td></td></tr>
-<tr><td> <a href = "#Geared_steppers">Geared_steppers</a> </td><td> <a href = "#Sealing_strip">Sealing_strip</a> </td><td> <a href = "#Psu_shroud">Psu_shroud</a> </td><td> <a href = "#Sweep">Sweep</a> </td><td></td></tr>
-<tr><td> <a href = "#Green_terminals">Green_terminals</a> </td><td> <a href = "#Sheets">Sheets</a> </td><td> <a href = "#Ribbon_clamp">Ribbon_clamp</a> </td><td> <a href = "#Thread">Thread</a> </td><td></td></tr>
-<tr><td> <a href = "#Hot_ends">Hot_ends</a> </td><td> <a href = "#Spades">Spades</a> </td><td> <a href = "#Screw_knob">Screw_knob</a> </td><td> <a href = "#Tube">Tube</a> </td><td></td></tr>
-<tr><td> <a href = "#Hygrometer">Hygrometer</a> </td><td> <a href = "#Spools">Spools</a> </td><td> <a href = "#Socket_box">Socket_box</a> </td><td></td><td></td></tr>
-<tr><td> <a href = "#Iecs">Iecs</a> </td><td> <a href = "#Springs">Springs</a> </td><td> <a href = "#Ssr_shroud">Ssr_shroud</a> </td><td></td><td></td></tr>
-<tr><td> <a href = "#Inserts">Inserts</a> </td><td> <a href = "#Ssrs">Ssrs</a> </td><td> <a href = "#Strap_handle">Strap_handle</a> </td><td></td><td></td></tr>
-<tr><td> <a href = "#Jack">Jack</a> </td><td> <a href = "#Stepper_motors">Stepper_motors</a> </td><td></td><td></td><td></td></tr>
-<tr><td> <a href = "#Ldrs">Ldrs</a> </td><td> <a href = "#Toggles">Toggles</a> </td><td></td><td></td><td></td></tr>
-<tr><td> <a href = "#Leadnuts">Leadnuts</a> </td><td> <a href = "#Transformers">Transformers</a> </td><td></td><td></td><td></td></tr>
-<tr><td> <a href = "#Leds">Leds</a> </td><td> <a href = "#Tubings">Tubings</a> </td><td></td><td></td><td></td></tr>
-<tr><td> <a href = "#Light_strips">Light_strips</a> </td><td> <a href = "#Variacs">Variacs</a> </td><td></td><td></td><td></td></tr>
-<tr><td> <a href = "#Linear_bearings">Linear_bearings</a> </td><td> <a href = "#Veroboard">Veroboard</a> </td><td></td><td></td><td></td></tr>
-<tr><td> <a href = "#Mains_sockets">Mains_sockets</a> </td><td> <a href = "#Washers">Washers</a> </td><td></td><td></td><td></td></tr>
-<tr><td> <a href = "#Meter">Meter</a> </td><td> <a href = "#Wire">Wire</a> </td><td></td><td></td><td></td></tr>
-<tr><td> <a href = "#Microswitches">Microswitches</a> </td><td> <a href = "#Zipties">Zipties</a> </td><td></td><td></td><td></td></tr>
-<tr><td> <a href = "#Microview">Microview</a> </td><td></td><td></td><td></td><td></td></tr>
+<tr><td> <a href = "#Geared_steppers">Geared_steppers</a> </td><td> <a href = "#Scs_bearing_blocks">Scs_bearing_blocks</a> </td><td> <a href = "#Psu_shroud">Psu_shroud</a> </td><td> <a href = "#Sweep">Sweep</a> </td><td></td></tr>
+<tr><td> <a href = "#Green_terminals">Green_terminals</a> </td><td> <a href = "#Sealing_strip">Sealing_strip</a> </td><td> <a href = "#Ribbon_clamp">Ribbon_clamp</a> </td><td> <a href = "#Thread">Thread</a> </td><td></td></tr>
+<tr><td> <a href = "#Hot_ends">Hot_ends</a> </td><td> <a href = "#Sheets">Sheets</a> </td><td> <a href = "#Screw_knob">Screw_knob</a> </td><td> <a href = "#Tube">Tube</a> </td><td></td></tr>
+<tr><td> <a href = "#Hygrometer">Hygrometer</a> </td><td> <a href = "#Sk_brackets">Sk_brackets</a> </td><td> <a href = "#Socket_box">Socket_box</a> </td><td></td><td></td></tr>
+<tr><td> <a href = "#Iecs">Iecs</a> </td><td> <a href = "#Spades">Spades</a> </td><td> <a href = "#Ssr_shroud">Ssr_shroud</a> </td><td></td><td></td></tr>
+<tr><td> <a href = "#Inserts">Inserts</a> </td><td> <a href = "#Spools">Spools</a> </td><td> <a href = "#Strap_handle">Strap_handle</a> </td><td></td><td></td></tr>
+<tr><td> <a href = "#Jack">Jack</a> </td><td> <a href = "#Springs">Springs</a> </td><td></td><td></td><td></td></tr>
+<tr><td> <a href = "#Kp_pillow_blocks">Kp_pillow_blocks</a> </td><td> <a href = "#Ssrs">Ssrs</a> </td><td></td><td></td><td></td></tr>
+<tr><td> <a href = "#Ldrs">Ldrs</a> </td><td> <a href = "#Stepper_motors">Stepper_motors</a> </td><td></td><td></td><td></td></tr>
+<tr><td> <a href = "#Leadnuts">Leadnuts</a> </td><td> <a href = "#Toggles">Toggles</a> </td><td></td><td></td><td></td></tr>
+<tr><td> <a href = "#Leds">Leds</a> </td><td> <a href = "#Transformers">Transformers</a> </td><td></td><td></td><td></td></tr>
+<tr><td> <a href = "#Light_strips">Light_strips</a> </td><td> <a href = "#Tubings">Tubings</a> </td><td></td><td></td><td></td></tr>
+<tr><td> <a href = "#Linear_bearings">Linear_bearings</a> </td><td> <a href = "#Variacs">Variacs</a> </td><td></td><td></td><td></td></tr>
+<tr><td> <a href = "#Mains_sockets">Mains_sockets</a> </td><td> <a href = "#Veroboard">Veroboard</a> </td><td></td><td></td><td></td></tr>
+<tr><td> <a href = "#Meter">Meter</a> </td><td> <a href = "#Washers">Washers</a> </td><td></td><td></td><td></td></tr>
+<tr><td> <a href = "#Microswitches">Microswitches</a> </td><td> <a href = "#Wire">Wire</a> </td><td></td><td></td><td></td></tr>
+<tr><td> <a href = "#Microview">Microview</a> </td><td> <a href = "#Zipties">Zipties</a> </td><td></td><td></td><td></td></tr>
 <tr><td> <a href = "#Modules">Modules</a> </td><td></td><td></td><td></td><td></td></tr>
 </table>
 
@@ -93,8 +94,10 @@ Also single bearing balls are modelled as just a silver sphere and a BOM entry.
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
 |   1 | ```ball_bearing(BB608)``` |  Ball bearing 608-2RS 8mm x 22mm x 7mm |
+|   1 | ```ball_bearing(BB6200)``` |  Ball bearing 6200-2RS 10mm x 30mm x 9mm |
+|   1 | ```ball_bearing(BB6201)``` |  Ball bearing 6201-2RS 12mm x 32mm x 10mm |
 |   1 | ```ball_bearing(BB624)``` |  Ball bearing 624-2RS 4mm x 13mm x 5mm |
-|   2 | ``` bearing_ball(3)``` |  Steel ball 3mm |
+|   4 | ``` bearing_ball(3)``` |  Steel ball 3mm |
 
 
 <a href="#top">Top</a>
@@ -196,7 +199,7 @@ Individual teeth are not drawn, instead they are represented by a lighter colour
 ### Modules
 | Module | Description |
 |:--- |:--- |
-| ```belt(type, points, gap = 0, gap_pt = undef)``` | Draw a belt path given a set of points and pitch radii where the pulleys are. Closed loop unless a gap is specified |
+| ```belt(type, points, gap = 0, gap_pt = undef, belt_colour = grey20, tooth_colour = grey50)``` | Draw a belt path given a set of points and pitch radii where the pulleys are. Closed loop unless a gap is specified |
 
 ![belts](tests/png/belts.png)
 
@@ -213,7 +216,7 @@ Individual teeth are not drawn, instead they are represented by a lighter colour
 |   2 | ```pulley(GT2x16_plain_idler)``` |  Pulley GT2 idler smooth 9.63mm |
 |   2 | ```pulley(GT2x20ob_pulley)``` |  Pulley GT2OB 20 teeth |
 |   1 | ```screw(M3_cs_cap_screw, 20)``` |  Screw M3 cs cap x 20mm |
-|   4 | ```screw(M3_grub_screw, 6)``` |  Screw M3 grub x 6mm |
+|   4 | ```screw(M3_grub_screw, 6)``` |  Screw M3 grub x  6mm |
 
 
 <a href="#top">Top</a>
@@ -823,7 +826,7 @@ Parametric green terminal blocks
 ### Modules
 | Module | Description |
 |:--- |:--- |
-| ```green_terminal(type, ways, skip = [])``` | Draw green terminal blocks, skip can be used to remove pins. |
+| ```green_terminal(type, ways, skip = [], colour = "lime")``` | Draw green terminal blocks, skip can be used to remove pins. |
 | ```terminal_254(ways, skip = [])``` | Draw 0.1" terminal block |
 
 ![green_terminals](tests/png/green_terminals.png)
@@ -1087,6 +1090,57 @@ E.g. a "brown" socket for mains live needs to be displayed as "sienna" to look r
 |   1 | ```jack_4mm_shielded("brown", 3, "sienna")``` |  4mm shielded jack socket brown |
 
 
+<a href="#top">Top</a>
+
+---
+<a name="Kp_pillow_blocks"></a>
+## Kp_pillow_blocks
+KP pillow block bearings
+
+
+[vitamins/kp_pillow_blocks.scad](vitamins/kp_pillow_blocks.scad) Object definitions.
+
+[vitamins/kp_pillow_block.scad](vitamins/kp_pillow_block.scad) Implementation.
+
+[tests/kp_pillow_blocks.scad](tests/kp_pillow_blocks.scad) Code for this example.
+
+### Properties
+| Function | Description |
+|:--- |:--- |
+| ```kp_base_height(type)``` | Height of base containing the bolts |
+| ```kp_diameter(type)``` | Rod hole diameter |
+| ```kp_hole_offset(type)``` | Rod hole offset |
+| ```kp_screw_separation(type)``` | Separation of bolts in the base |
+
+### Functions
+| Function | Description |
+|:--- |:--- |
+| ```kp_size(type)``` | Size of bracket |
+
+### Modules
+| Module | Description |
+|:--- |:--- |
+| ```kp_pillow_block(type)``` | Draw the KP pillow block |
+| ```kp_pillow_block_assembly(type, part_thickness = 2, screw_type = M5_cap_screw, nut_type = undef)``` | Assembly with fasteners in place |
+| ```kp_pillow_block_hole_positions(type)``` | Place children at hole positions |
+
+![kp_pillow_blocks](tests/png/kp_pillow_blocks.png)
+
+### Vitamins
+| Qty | Module call | BOM entry |
+| ---:|:--- |:---|
+|   1 | ```kp_pillow_block(KP000)``` |  KP000 pillow block |
+|   1 | ```kp_pillow_block(KP001)``` |  KP001 pillow block |
+|   1 | ```kp_pillow_block(KP08)``` |  KP08 pillow block |
+|   2 | ```sliding_t_nut(M4_sliding_t_nut)``` |  Nut M4 sliding T |
+|   2 | ```sliding_t_nut(M5_sliding_t_nut)``` |  Nut M5 sliding T |
+|   2 | ```nut(M5_nut, nyloc = undef)``` |  Nut M5 x 4mm  |
+|   2 | ```screw(M4_cap_screw, 10)``` |  Screw M4 cap x 10mm |
+|   4 | ```screw(M5_cap_screw, 12)``` |  Screw M5 cap x 12mm |
+|   2 | ```washer(M4_washer)``` |  Washer  M4 x 9mm x 0.8mm |
+|   6 | ```washer(M5_washer)``` |  Washer  M5 x 10mm x 1mm |
+
+
 <a href="#top">Top</a>
 
 ---
@@ -1623,12 +1677,12 @@ If a nut is given a child then it gets placed on its top surface.
 |   1 | ```nut(M2p5_nut)``` |  Nut M2.5 x 2.2mm  |
 |   1 | ```nut(M2p5_nut, nyloc = true)``` |  Nut M2.5 x 2.2mm nyloc |
 |   1 | ```nut(M2p5_nut, nylon = true)``` |  Nut M2.5 x 2.2mm nylon |
-|   1 | ```hammer_nut(M3_hammer_nut)``` |  Nut M3 hammer |
+|   1 | ```sliding_t_nut(M3_hammer_nut)``` |  Nut M3 hammer |
 |   1 | ```sliding_t_nut(M3_sliding_t_nut)``` |  Nut M3 sliding T |
 |   1 | ```nut(M3_nut)``` |  Nut M3 x 2.4mm  |
 |   1 | ```nut(M3_nut, brass = true)``` |  Nut M3 x 2.4mm brass |
 |   1 | ```nut(M3_nut, nyloc = true)``` |  Nut M3 x 2.4mm nyloc |
-|   1 | ```hammer_nut(M4_hammer_nut)``` |  Nut M4 hammer |
+|   1 | ```sliding_t_nut(M4_hammer_nut)``` |  Nut M4 hammer |
 |   1 | ```sliding_t_nut(M4_sliding_t_nut)``` |  Nut M4 sliding T |
 |   1 | ```nut(M4_nut)``` |  Nut M4 x 3.2mm  |
 |   1 | ```nut(M4_nut, nyloc = true)``` |  Nut M4 x 3.2mm nyloc |
@@ -1760,6 +1814,7 @@ PCBs and perfboard with optional components. The shape can be a rectangle with o
 | Module | Description |
 |:--- |:--- |
 | ```barrel_jack(cutout = false)``` | Draw barrel power jack |
+| ```buzzer(height, diameter, colour)``` | Draw PCB buzzer with specified height, diameter and color |
 | ```chip(length, width, thickness, colour, cutout = false)``` | Draw a coloured cube to represent a chip, or other rectangular component |
 | ```flat_flex(cutout = false)``` | Draw flat flexistrip connector as used on RPI0 |
 | ```flex(cutout = false)``` | Draw flexistrip connector |
@@ -2026,10 +2081,10 @@ Face order is bottom, top, left, right, front, back.
 |   1 | ```psu(PD_150_12)``` |  PSU PD-150-12 |
 |   1 | ```psu(S_250_48)``` |  PSU S-250-48 |
 |   1 | ```psu(S_300_12)``` |  PSU S-300-12 |
-|   4 | ```screw(No632_pan_screw, 8)``` |  Screw 6-32 pan x 8mm |
-|   4 | ```screw(M3_cap_screw, 8)``` |  Screw M3 cap x 8mm |
-|   8 | ```screw(M3_pan_screw, 8)``` |  Screw M3 pan x 8mm |
-|   4 | ```screw(M4_cap_screw, 8)``` |  Screw M4 cap x 8mm |
+|   4 | ```screw(No632_pan_screw, 8)``` |  Screw 6-32 pan x  8mm |
+|   4 | ```screw(M3_cap_screw, 8)``` |  Screw M3 cap x  8mm |
+|   8 | ```screw(M3_pan_screw, 8)``` |  Screw M3 pan x  8mm |
+|   4 | ```screw(M4_cap_screw, 8)``` |  Screw M4 cap x  8mm |
 |  12 | ```washer(M3_washer)``` |  Washer  M3 x 7mm x 0.5mm |
 |   8 | ```washer(M4_washer)``` |  Washer  M4 x 9mm x 0.8mm |
 
@@ -2095,10 +2150,10 @@ Timing belt pulleys, both toothed and plain with internal bearings for idlers.
 |   1 | ```pulley(GT2x20um_pulley)``` |  Pulley GT2UM 20 teeth |
 |   1 | ```pulley(T2p5x16_pulley)``` |  Pulley T2.5 16 teeth |
 |   1 | ```pulley(T5x10_pulley)``` |  Pulley T5 10 teeth |
-|   1 | ```screw(M3_grub_screw, 3)``` |  Screw M3 grub x 3mm |
-|   2 | ```screw(M3_grub_screw, 4)``` |  Screw M3 grub x 4mm |
-|   4 | ```screw(M3_grub_screw, 6)``` |  Screw M3 grub x 6mm |
-|   1 | ```screw(M4_grub_screw, 6)``` |  Screw M4 grub x 6mm |
+|   1 | ```screw(M3_grub_screw, 3)``` |  Screw M3 grub x  3mm |
+|   2 | ```screw(M3_grub_screw, 4)``` |  Screw M3 grub x  4mm |
+|   4 | ```screw(M3_grub_screw, 6)``` |  Screw M3 grub x  6mm |
+|   1 | ```screw(M4_grub_screw, 6)``` |  Screw M4 grub x  6mm |
 
 
 <a href="#top">Top</a>
@@ -2258,7 +2313,7 @@ Rocker switch. Also used for neon indicator in the same form factor.
 | ```rocker_height(type)``` | Body height |
 | ```rocker_part(type)``` | Part description |
 | ```rocker_pivot(type)``` | Pivot distance from the back of the flange |
-| ```rocker_slot_h(type)``` | Panel slow height |
+| ```rocker_slot_h(type)``` | Panel slot height |
 | ```rocker_slot_w(type)``` | Panel slot width |
 | ```rocker_spades(type)``` | Spade types and positions |
 | ```rocker_width(type)``` | Body width |
@@ -2266,7 +2321,7 @@ Rocker switch. Also used for neon indicator in the same form factor.
 ### Modules
 | Module | Description |
 |:--- |:--- |
-| ```rocker(type)``` | Draw the specified rocker switch |
+| ```rocker(type, colour)``` | Draw the specified rocker switch |
 | ```rocker_hole(type, h = 0)``` | Make a hole to accept a rocker switch, by default 2D, set h for 3D |
 
 ![rockers](tests/png/rockers.png)
@@ -2274,8 +2329,8 @@ Rocker switch. Also used for neon indicator in the same form factor.
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|   1 | ```rocker(neon_indicator)``` |  Neon Indicator H8630FBNAL |
-|   1 | ```rocker(small_rocker)``` |  Rocker Switch PRASA1-16F-BB0BW |
+|   2 | ```rocker(neon_indicator)``` |  Neon Indicator H8630FBNAL |
+|   2 | ```rocker(small_rocker)``` |  Rocker Switch PRASA1-16F-BB0BW |
 
 
 <a href="#top">Top</a>
@@ -2383,14 +2438,14 @@ Machine screws and wood screws with various head styles.
 |   1 | ```screw(M3_cap_screw, 10)``` |  Screw M3 cap x 10mm |
 |   1 | ```screw(M3_cs_cap_screw, 10)``` |  Screw M3 cs cap x 10mm |
 |   1 | ```screw(M3_dome_screw, 10)``` |  Screw M3 dome x 10mm |
-|   1 | ```screw(M3_grub_screw, 6)``` |  Screw M3 grub x 6mm |
+|   1 | ```screw(M3_grub_screw, 6)``` |  Screw M3 grub x  6mm |
 |   1 | ```screw(M3_hex_screw, 10)``` |  Screw M3 hex x 10mm |
 |   1 | ```screw(M3_low_cap_screw, 10)``` |  Screw M3 low cap x 10mm |
 |   1 | ```screw(M3_pan_screw, 10)``` |  Screw M3 pan x 10mm |
 |   1 | ```screw(M4_cap_screw, 25)``` |  Screw M4 cap x 25mm |
 |   1 | ```screw(M4_cs_cap_screw, 25)``` |  Screw M4 cs cap x 25mm |
 |   1 | ```screw(M4_dome_screw, 25)``` |  Screw M4 dome x 25mm |
-|   1 | ```screw(M4_grub_screw, 6)``` |  Screw M4 grub x 6mm |
+|   1 | ```screw(M4_grub_screw, 6)``` |  Screw M4 grub x  6mm |
 |   1 | ```screw(M4_hex_screw, 30)``` |  Screw M4 hex x 30mm |
 |   1 | ```screw(M4_pan_screw, 30)``` |  Screw M4 pan x 30mm |
 |   1 | ```screw(M5_cap_screw, 30)``` |  Screw M5 cap x 30mm |
@@ -2407,6 +2462,64 @@ Machine screws and wood screws with various head styles.
 |   1 | ```screw(No6_screw, 30)``` |  Screw No6 pan wood x 30mm |
 
 
+<a href="#top">Top</a>
+
+---
+<a name="Scs_bearing_blocks"></a>
+## Scs_bearing_blocks
+[vitamins/scs_bearing_blocks.scad](vitamins/scs_bearing_blocks.scad) Object definitions.
+
+[vitamins/scs_bearing_block.scad](vitamins/scs_bearing_block.scad) Implementation.
+
+[tests/scs_bearing_blocks.scad](tests/scs_bearing_blocks.scad) Code for this example.
+
+### Properties
+| Function | Description |
+|:--- |:--- |
+| ```scs_bearing(type)``` | Linear bearing used |
+| ```scs_block_center_height(type)``` | Height of the center of the block |
+| ```scs_block_side_height(type)``` | Height of the side of the block, this determines the minimum screw length |
+| ```scs_hole_offset(type)``` | Offset of bearing hole from base of block |
+| ```scs_screw(type)``` | Screw type |
+| ```scs_screw_separation_x(type)``` | Screw separation in X direction |
+| ```scs_screw_separation_z(type)``` | Screw separation in Z direction |
+
+### Functions
+| Function | Description |
+|:--- |:--- |
+| ```scs_size(type)``` | Size of scs bracket bounding block |
+
+### Modules
+| Module | Description |
+|:--- |:--- |
+| ```scs_bearing_block(type)``` | Draw the specified SCS bearing block |
+| ```scs_bearing_block_assembly(type, part_thickness, screw_type, nut_type)``` | Assembly with screws and nuts in place |
+| ```scs_bearing_block_hole_positions(type)``` | Place children at hole positions |
+
+![scs_bearing_blocks](tests/png/scs_bearing_blocks.png)
+
+### Vitamins
+| Qty | Module call | BOM entry |
+| ---:|:--- |:---|
+|  12 | ```nut(M4_nut)``` |  Nut M4 x 3.2mm  |
+|  24 | ```nut(M5_nut)``` |  Nut M5 x 4mm  |
+|   1 | ```scs_bearing_block(SCS10LUU)``` |  SCS10LUU bearing block |
+|   1 | ```scs_bearing_block(SCS10UU)``` |  SCS10UU bearing block |
+|   1 | ```scs_bearing_block(SCS12LUU)``` |  SCS12LUU bearing block |
+|   1 | ```scs_bearing_block(SCS12UU)``` |  SCS12UU bearing block |
+|   1 | ```scs_bearing_block(SCS16LUU)``` |  SCS16LUU bearing block |
+|   1 | ```scs_bearing_block(SCS16UU)``` |  SCS16UU bearing block |
+|   1 | ```scs_bearing_block(SCS6UU)``` |  SCS6UU bearing block |
+|   1 | ```scs_bearing_block(SCS8LUU)``` |  SCS8LUU bearing block |
+|   1 | ```scs_bearing_block(SCS8UU)``` |  SCS8UU bearing block |
+|   4 | ```screw(M4_cap_screw, 25)``` |  Screw M4 cap x 25mm |
+|   8 | ```screw(M4_cap_screw, 30)``` |  Screw M4 cap x 30mm |
+|  16 | ```screw(M5_cap_screw, 35)``` |  Screw M5 cap x 35mm |
+|   8 | ```screw(M5_cap_screw, 45)``` |  Screw M5 cap x 45mm |
+|  12 | ```washer(M4_washer)``` |  Washer  M4 x 9mm x 0.8mm |
+|  24 | ```washer(M5_washer)``` |  Washer  M5 x 10mm x 1mm |
+
+
 <a href="#top">Top</a>
 
 ---
@@ -2496,6 +2609,58 @@ Note that modules that drill holes will return a 2D object if ```h``` is set to
 |   1 | ```sheet(Steel06, 30, 30, 2)``` |  Sheet mild steel 30mm x 30mm x 0.6mm |
 
 
+<a href="#top">Top</a>
+
+---
+<a name="Sk_brackets"></a>
+## Sk_brackets
+SK shaft support brackets
+
+
+[vitamins/sk_brackets.scad](vitamins/sk_brackets.scad) Object definitions.
+
+[vitamins/sk_bracket.scad](vitamins/sk_bracket.scad) Implementation.
+
+[tests/sk_brackets.scad](tests/sk_brackets.scad) Code for this example.
+
+### Properties
+| Function | Description |
+|:--- |:--- |
+| ```sk_base_height(type)``` | Height of base containing the screws |
+| ```sk_diameter(type)``` | Rod hole diameter |
+| ```sk_hole_offset(type)``` | Rod hole offset |
+| ```sk_screw_separation(type)``` | Separation of screws in the base |
+
+### Functions
+| Function | Description |
+|:--- |:--- |
+| ```sk_size(type)``` | Size of bracket |
+
+### Modules
+| Module | Description |
+|:--- |:--- |
+| ```sk_bracket(type)``` | SK shaft support bracket |
+| ```sk_bracket_assembly(type, part_thickness = 2, screw_type = M5_cap_screw, nut_type = undef)``` | Assembly with fasteners in place |
+| ```sk_bracket_hole_positions(type)``` | Place children at hole positions |
+
+![sk_brackets](tests/png/sk_brackets.png)
+
+### Vitamins
+| Qty | Module call | BOM entry |
+| ---:|:--- |:---|
+|   2 | ```sliding_t_nut(M4_sliding_t_nut)``` |  Nut M4 sliding T |
+|   2 | ```sliding_t_nut(M5_sliding_t_nut)``` |  Nut M5 sliding T |
+|   4 | ```nut(M5_nut, nyloc = undef)``` |  Nut M5 x 4mm  |
+|   1 | ```sk_bracket(SK10)``` |  SK10 shaft support bracket |
+|   1 | ```sk_bracket(SK12)``` |  SK12 shaft support bracket |
+|   1 | ```sk_bracket(SK16)``` |  SK16 shaft support bracket |
+|   1 | ```sk_bracket(SK8)``` |  SK8 shaft support bracket |
+|   2 | ```screw(M4_cap_screw, 12)``` |  Screw M4 cap x 12mm |
+|   6 | ```screw(M5_cap_screw, 16)``` |  Screw M5 cap x 16mm |
+|   2 | ```washer(M4_washer)``` |  Washer  M4 x 9mm x 0.8mm |
+|  10 | ```washer(M5_washer)``` |  Washer  M5 x 10mm x 1mm |
+
+
 <a href="#top">Top</a>
 
 ---
@@ -2562,7 +2727,7 @@ Filament spool models
 ### Modules
 | Module | Description |
 |:--- |:--- |
-| ```spool(type)``` | Draw specified spool |
+| ```spool(type, filament_depth = 0, filament_colour = "white", filament_d = 3)``` | Draw specified spool with optional filament |
 
 ![spools](tests/png/spools.png)
 
@@ -2712,7 +2877,7 @@ NEMA stepper motor model.
 ### Vitamins
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
-|  24 | ```screw(M3_pan_screw, 8)``` |  Screw M3 pan x 8mm |
+|  24 | ```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(NEMA17S)``` |  Stepper motor NEMA17 x 34mm |
@@ -3506,7 +3671,7 @@ Star washers can be omitted by setting ```star_washers``` to false.
 |   3 | ```insert(F1BM2p5)``` |  Heatfit insert M2.5 |
 |   3 | ```insert(F1BM3)``` |  Heatfit insert M3 |
 |   3 | ```insert(F1BM4)``` |  Heatfit insert M4 |
-|   3 | ```screw(M2_cap_screw, 8)``` |  Screw M2 cap x 8mm |
+|   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 |
 |   3 | ```screw(M4_dome_screw, 12)``` |  Screw M4 dome x 12mm |
@@ -3726,7 +3891,7 @@ Star washers can be omitted by setting ```star_washers``` to false.
 |   3 | ```insert(F1BM2p5)``` |  Heatfit insert M2.5 |
 |   3 | ```insert(F1BM3)``` |  Heatfit insert M3 |
 |   3 | ```insert(F1BM4)``` |  Heatfit insert M4 |
-|   3 | ```screw(M2_cap_screw, 8)``` |  Screw M2 cap x 8mm |
+|   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 |
 |   3 | ```screw(M4_dome_screw, 16)``` |  Screw M4 dome x 16mm |
@@ -3870,7 +4035,7 @@ inserts don't grip well in rubber.
 | ---:|:--- |:---|
 |   1 | ```insert(F1BM3)``` |  Heatfit insert M3 |
 |   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(M3_cap_screw, 8)``` |  Screw M3 cap x  8mm |
 |   1 | ```screw(M4_cap_screw, 16)``` |  Screw M4 cap x 16mm |
 |   1 | ```washer(M3_washer)``` |  Washer  M3 x 7mm x 0.5mm |
 |   2 | ```washer(M4_washer)``` |  Washer  M4 x 9mm x 0.8mm |
@@ -4285,7 +4450,7 @@ be fully customised by passing a list of properties.
 | Qty | Module call | BOM entry |
 | ---:|:--- |:---|
 |   2 | ```insert(F1BM3)``` |  Heatfit insert M3 |
-|   2 | ```screw(M3_pan_screw, 8)``` |  Screw M3 pan x 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 |
 
@@ -4757,7 +4922,7 @@ heirachical BOMs are also generated for real projects.
 | ---:|:--- |:---|
 |   1 | ```insert(F1BM3)``` |  Heatfit insert M3 |
 |   1 | ```widget(3)``` |  Rivit like thing for 3mm sheets |
-|   1 | ```screw(M3_cap_screw, 8)``` |  Screw M3 cap x 8mm |
+|   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 |
 |   1 | ```star_washer(M3_washer)``` |  Washer star M3 x 0.5mm |
@@ -4965,11 +5130,12 @@ Small holes can get away without it, but they print better with truncated teardr
 ### Modules
 | Module | Description |
 |:--- |:--- |
-| ```semi_teardrop(h, r, d = undef, center = true)``` | A semi teardrop in the positive Y domain |
-| ```teardrop(h, r, center = true, truncate = true)``` | For making horizontal holes that don't need support material, set ```truncate = false``` to make traditional RepRap teardrops that don't even need bridging |
-| ```teardrop_plus(h, r, center = true, truncate = true)``` | Slightly bigger teardrop to allow for the 3D printing staircase effect |
-| ```tearslot(h, r, w, center = true)``` | A horizontal slot that doesn't need support material |
-| ```vertical_tearslot(h, r, l, center = true)``` | A vertical slot that doesn't need support material |
+| ```semi_teardrop(h, r, d = undef, center = true, chamfer = 0)``` | A semi teardrop in the positive Y domain |
+| ```teardrop(h, r, center = true, truncate = true, chamfer = 0)``` | For making horizontal holes that don't need support material, set ```truncate = false``` to make traditional RepRap teardrops that don't even need bridging |
+| ```teardrop_chamfer(h, center, chamfer)``` | Helper module for adding chamfer to a teardrop |
+| ```teardrop_plus(h, r, center = true, truncate = true, chamfer = 0)``` | Slightly bigger teardrop to allow for the 3D printing staircase effect |
+| ```tearslot(h, r, w, center = true, chamfer = 0)``` | A horizontal slot that doesn't need support material |
+| ```vertical_tearslot(h, r, l, center = true, chamfer = 0)``` | A vertical slot that doesn't need support material |
 
 ![teardrops](tests/png/teardrops.png)
 

scripts/exports.py

@@ -85,48 +85,49 @@ def make_parts(target, part_type, parts = None):
     #
     lib_dir = os.environ['OPENSCADPATH'] + '/NopSCADlib/printed'
     module_suffix = '_dxf' if part_type == 'svg' else '_' + part_type
-    for dir in [source_dir, lib_dir]:
-        for filename in os.listdir(dir):
-            if filename[-5:] == ".scad":
-                #
-                # find any modules ending in _<part_type>
-                #
-                with open(dir + "/" + filename, "r") as f:
-                    for line in f.readlines():
-                        words = line.split()
-                        if(len(words) and words[0] == "module"):
-                            module = words[1].split('(')[0]
-                            if module.endswith(module_suffix):
-                                base_name = module[:-4]
-                                part = base_name + '.' + part_type
-                                if part in targets:
-                                    #
-                                    # make a file to use the module
-                                    #
-                                    part_maker_name = part_type + ".scad"
-                                    with open(part_maker_name, "w") as f:
-                                        f.write("use <%s/%s>\n" % (dir, filename))
-                                        f.write("%s();\n" % module);
-                                    #
-                                    # Run openscad on the created file
-                                    #
-                                    part_file = target_dir + "/" + part
-                                    dname = deps_name(deps_dir, filename)
-                                    changed = check_deps(part_file, dname)
-                                    changed = times.check_have_time(changed, part)
-                                    if part_type == 'stl' and not changed and not part in bounds_map:
-                                        changed = "No bounds"
-                                    if changed:
-                                        print(changed)
-                                        t = time.time()
-                                        openscad.run("-D$bom=1", "-d", dname, "-o", part_file, part_maker_name)
-                                        times.add_time(part, t)
-                                        if part_type == 'stl':
-                                            bounds = c14n_stl.canonicalise(part_file)
-                                            bounds_map[part] = bounds
+    for dir in [source_dir, source_dir + '/printed', lib_dir]:
+        if os.path.isdir(dir):
+            for filename in os.listdir(dir):
+                if filename[-5:] == ".scad":
+                    #
+                    # find any modules ending in _<part_type>
+                    #
+                    with open(dir + "/" + filename, "r") as f:
+                        for line in f.readlines():
+                            words = line.split()
+                            if(len(words) and words[0] == "module"):
+                                module = words[1].split('(')[0]
+                                if module.endswith(module_suffix):
+                                    base_name = module[:-4]
+                                    part = base_name + '.' + part_type
+                                    if part in targets:
+                                        #
+                                        # make a file to use the module
+                                        #
+                                        part_maker_name = part_type + ".scad"
+                                        with open(part_maker_name, "w") as f:
+                                            f.write("use <%s/%s>\n" % (dir, filename))
+                                            f.write("%s();\n" % module);
+                                        #
+                                        # Run openscad on the created file
+                                        #
+                                        part_file = target_dir + "/" + part
+                                        dname = deps_name(deps_dir, filename)
+                                        changed = check_deps(part_file, dname)
+                                        changed = times.check_have_time(changed, part)
+                                        if part_type == 'stl' and not changed and not part in bounds_map:
+                                            changed = "No bounds"
+                                        if changed:
+                                            print(changed)
+                                            t = time.time()
+                                            openscad.run("-D$bom=1", "-d", dname, "-o", part_file, part_maker_name)
+                                            times.add_time(part, t)
+                                            if part_type == 'stl':
+                                                bounds = c14n_stl.canonicalise(part_file)
+                                                bounds_map[part] = bounds
 
-                                    targets.remove(part)
-                                    os.remove(part_maker_name)
+                                        targets.remove(part)
+                                        os.remove(part_maker_name)
     #
     # Write new bounds file
     #

scripts/views.py

@@ -124,66 +124,67 @@ def views(target, do_assemblies = None):
     #
     main_blurb = None
     lib_dir = os.environ['OPENSCADPATH'] + '/NopSCADlib/printed'
-    for dir in [source_dir, lib_dir]:
-        for filename in os.listdir(dir):
-            if filename.endswith('.scad'):
-                #
-                # find any modules with names ending in _assembly
-                #
-                with open(dir + "/" + filename, "r") as f:
-                    lines = f.readlines()
-                line_no = 0
-                for line in lines:
-                    words = line.split()
-                    if len(words) and words[0] == "module":
-                        module = words[1].split('(')[0]
-                        if is_assembly(module):
-                            if module in assemblies:
-                                #
-                                # Scrape the assembly instructions
-                                #
-                                for ass in flat_bom:
-                                    if ass["name"] == module:
-                                        if not "blurb" in ass:
-                                            ass["blurb"] = blurb.scrape_module_blurb(lines[:line_no])
-                                        break
-                                if not do_assemblies or module in do_assemblies:
+    for dir in [source_dir, source_dir + '/printed', lib_dir]:
+        if os.path.isdir(dir):
+            for filename in os.listdir(dir):
+                if filename.endswith('.scad'):
+                    #
+                    # find any modules with names ending in _assembly
+                    #
+                    with open(dir + "/" + filename, "r") as f:
+                        lines = f.readlines()
+                    line_no = 0
+                    for line in lines:
+                        words = line.split()
+                        if len(words) and words[0] == "module":
+                            module = words[1].split('(')[0]
+                            if is_assembly(module):
+                                if module in assemblies:
                                     #
-                                    # make a file to use the module
+                                    # Scrape the assembly instructions
                                     #
-                                    png_maker_name = 'png.scad'
-                                    with open(png_maker_name, "w") as f:
-                                        f.write("use <%s/%s>\n" % (dir, filename))
-                                        f.write("%s();\n" % module);
-                                    #
-                                    # Run openscad on the created file
-                                    #
-                                    dname = deps_name(deps_dir, filename)
-                                    for explode in [0, 1]:
-                                        png_name = target_dir + '/' + module + '.png'
-                                        if not explode:
-                                            png_name = png_name.replace('_assembly', '_assembled')
-                                        changed = check_deps(png_name, dname)
-                                        changed = times.check_have_time(changed, png_name)
-                                        changed = options.have_changed(changed, png_name)
-                                        tmp_name = 'tmp.png'
-                                        if changed:
-                                            print(changed)
-                                            t = time.time()
-                                            openscad.run_list(options.list() + ["-D$pose=1", "-D$explode=%d" % explode, colour_scheme, "--projection=p", "--imgsize=4096,4096", "--autocenter", "--viewall", "-d", dname, "-o", tmp_name, png_maker_name]);
-                                            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)
-                                        tn_name = png_name.replace('.png', '_tn.png')
-                                        if mtime(png_name) > mtime(tn_name):
-                                            do_cmd(("magick "+ png_name + " -trim -resize 280x280 -background " + background + " -gravity Center -extent 280x280 -bordercolor " + background + " -border 10 " + tmp_name).split())
-                                            update_image(tmp_name, tn_name)
-                                    os.remove(png_maker_name)
-                                done_assemblies.append(module)
-                            else:
-                                if module == 'main_assembly':
-                                    main_blurb = blurb.scrape_module_blurb(lines[:line_no])
-                    line_no += 1
+                                    for ass in flat_bom:
+                                        if ass["name"] == module:
+                                            if not "blurb" in ass:
+                                                ass["blurb"] = blurb.scrape_module_blurb(lines[:line_no])
+                                            break
+                                    if not do_assemblies or module in do_assemblies:
+                                        #
+                                        # make a file to use the module
+                                        #
+                                        png_maker_name = 'png.scad'
+                                        with open(png_maker_name, "w") as f:
+                                            f.write("use <%s/%s>\n" % (dir, filename))
+                                            f.write("%s();\n" % module);
+                                        #
+                                        # Run openscad on the created file
+                                        #
+                                        dname = deps_name(deps_dir, filename)
+                                        for explode in [0, 1]:
+                                            png_name = target_dir + '/' + module + '.png'
+                                            if not explode:
+                                                png_name = png_name.replace('_assembly', '_assembled')
+                                            changed = check_deps(png_name, dname)
+                                            changed = times.check_have_time(changed, png_name)
+                                            changed = options.have_changed(changed, png_name)
+                                            tmp_name = 'tmp.png'
+                                            if changed:
+                                                print(changed)
+                                                t = time.time()
+                                                openscad.run_list(options.list() + ["-D$pose=1", "-D$explode=%d" % explode, colour_scheme, "--projection=p", "--imgsize=4096,4096", "--autocenter", "--viewall", "-d", dname, "-o", tmp_name, png_maker_name]);
+                                                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)
+                                            tn_name = png_name.replace('.png', '_tn.png')
+                                            if mtime(png_name) > mtime(tn_name):
+                                                do_cmd(("magick "+ png_name + " -trim -resize 280x280 -background " + background + " -gravity Center -extent 280x280 -bordercolor " + background + " -border 10 " + tmp_name).split())
+                                                update_image(tmp_name, tn_name)
+                                        os.remove(png_maker_name)
+                                    done_assemblies.append(module)
+                                else:
+                                    if module == 'main_assembly':
+                                        main_blurb = blurb.scrape_module_blurb(lines[:line_no])
+                        line_no += 1
     times.print_times()
     #
     # Build the document

tests/belts.scad

@@ -67,7 +67,7 @@ module belt_test() {
     translate([-25, 0])
         layout([for(b = belts) belt_width(b)], 10)
             rotate([0, 90, 0])
-                belt(belts[$i], [[0, 0, 20], [0, 1, 20]]);
+                belt(belts[$i], [[0, 0, 20], [0, 1, 20]], belt_colour = $i%2==0 ? grey90 : grey20, tooth_colour = $i%2==0 ? grey70 : grey50);
 }
 
 if($preview)

tests/kp_pillow_blocks.scad

@@ -0,0 +1,34 @@
+//
+// NopSCADlib Copyright Chris Palmer 2018
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+include <../core.scad>
+use <../utils/layout.scad>
+
+include <../vitamins/kp_pillow_blocks.scad>
+include <../vitamins/nuts.scad>
+
+module kp_pillow_blocks() {
+    screws = [M4_cap_screw, M5_cap_screw, M5_cap_screw];
+    nuts = [M4_sliding_t_nut, M5_sliding_t_nut, M5_nut];
+    layout([for(k = kp_pillow_blocks) 2 * kp_size(k)[1]])
+        kp_pillow_block_assembly(kp_pillow_blocks[$i], screw_type = screws[$i], nut_type = nuts[$i]);
+}
+
+if($preview)
+    kp_pillow_blocks();
+

tests/nuts.scad

@@ -58,10 +58,10 @@ module nuts() {
 
         translate([0, 80]) {
             if(n == M3_nut)
-                hammer_nut(M3_hammer_nut);
+                sliding_t_nut(M3_hammer_nut);
 
             if(n == M4_nut)
-                hammer_nut(M4_hammer_nut);
+                sliding_t_nut(M4_hammer_nut);
        }
     }
 }

tests/rockers.scad

@@ -21,9 +21,13 @@ use <../utils/layout.scad>
 
 include <../vitamins/rockers.scad>
 
-module rockers()
-    layout([for(r = rockers) rocker_flange_w(r)], 5)
+module rockers() {
+    layout([for(r = rockers) rocker_flange_w(r)], 5) {
         rocker(rockers[$i]);
+        translate([0, 25])
+            rocker(rockers[$i], $i==0 ? "red" : "green");
+    }
+}
 
 if($preview)
     rockers();

tests/scs_bearing_blocks.scad

@@ -0,0 +1,35 @@
+//
+// NopSCADlib Copyright Chris Palmer 2020
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+include <../core.scad>
+use <../utils/layout.scad>
+
+include <../vitamins/scs_bearing_blocks.scad>
+
+module scs_bearing_blocks()
+    layout([for(s = scs_bearing_blocks) 2 * scs_size(s)[0]]) {
+        part_thickness = 5;
+        scs_bearing_block_assembly(scs_bearing_blocks[$i], part_thickness);
+
+        if($i > 0) // skip $i==0, since no SCS6LUU long variant to match SCS6UU
+            translate([0, 60])
+                scs_bearing_block_assembly(scs_bearing_blocks_long[$i - 1], part_thickness);
+    }
+
+if($preview)
+    scs_bearing_blocks();

tests/sk_brackets.scad

@@ -0,0 +1,33 @@
+//
+// NopSCADlib Copyright Chris Palmer 2018
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+include <../core.scad>
+use <../utils/layout.scad>
+
+include <../vitamins/sk_brackets.scad>
+
+module sk_brackets() {
+    screws = [M5_cap_screw, M5_cap_screw, M4_cap_screw, M5_cap_screw];
+    nuts = [undef, M5_nut, M4_sliding_t_nut, M5_sliding_t_nut];
+    layout([for(s = sk_brackets) 1.5 * sk_size(s)[1]])
+        sk_bracket_assembly(sk_brackets[$i], screw_type = screws[$i], nut_type = nuts[$i]);
+}
+
+if($preview)
+    let($show_threads = true)
+        sk_brackets();

tests/spools.scad

@@ -23,9 +23,9 @@ use <../utils/layout.scad>
 include <../vitamins/spools.scad>
 
 module spools()
-    layout([for(s = spools) spool_height(s)], 100)
+    layout([for(s = spools) spool_height(s)], 100) let(s = spools[$i])
         rotate([90, 0, 90])
-            spool(spools[$i]);
+            spool(s, filament_depth =  spool_depth(s) / 2, filament_colour = [pp1_colour, pp2_colour, pp3_colour, pp4_colour][$i % 4], filament_d = $i ? 3 : 1.75);
 
 if($preview)
     spools();

tests/teardrops.scad

@@ -22,25 +22,47 @@ include <../core.scad>
 module teardrops() {
     color(pp1_colour)
         rotate([90, 0, -45])
-            linear_extrude(height = 3)
-                difference() {
-                    square(40);
+            difference() {
+                linear_extrude(height = 3) {
+                    difference() {
+                        square([80, 40]);
+
+                        translate([10, 10])
+                            teardrop(h = 0, r = 3);
+
+                        translate([10, 20])
+                            teardrop_plus(h = 0, r = 3);
+
+                        translate([20, 30])
+                            tearslot(h = 0, r = 3, w = 10);
+
+                        translate([30, 15])
+                            vertical_tearslot(h = 0, r =3, l = 10);
+
+                        translate([20, 10])
+                            semi_teardrop(h = 0, r = 3);
+                    }
+                }
+                translate([40, 0, 1.5]) {
+                    h = 3 + eps;
+                    chamfer = 0.5;
 
                     translate([10, 10])
-                        teardrop(h = 0, r = 3);
+                        teardrop(h = h, r = 3, chamfer = chamfer);
 
                     translate([10, 20])
-                        teardrop_plus(h = 0, r = 3);
+                        teardrop_plus(h = h, r = 3, chamfer = chamfer);
 
                     translate([20, 30])
-                        tearslot(h = 0, r = 3, w = 10);
+                        tearslot(h = h, r = 3, w = 10, chamfer = chamfer);
 
                     translate([30, 15])
-                        vertical_tearslot(h = 0, r =3, l = 10);
+                        vertical_tearslot(h = h, r =3, l = 10, chamfer = chamfer);
 
                     translate([20, 10])
-                        semi_teardrop(h = 0, r = 3);
+                        semi_teardrop(h = h, r = 3, chamfer = chamfer);
                 }
+            }
 }
 
 teardrops();

utils/core/teardrops.scad

@@ -21,45 +21,106 @@
 //! For making horizontal holes that don't need support material.
 //! Small holes can get away without it, but they print better with truncated teardrops.
 //
-module teardrop(h, r, center = true, truncate = true) //! For making horizontal holes that don't need support material, set ```truncate = false``` to make traditional RepRap teardrops that don't even need bridging
-    render(convexity = 5)
-        extrude_if(h, center)
-           hull() {
-                circle4n(r);
-
-                if(truncate)
-                    translate([0, r / 2])
-                        square([2 * r * (sqrt(2) - 1), r], center = true);
-                else
-                    polygon([[0, 0], [eps, 0], [0, r * sqrt(2)]]);
-            }
-
-module semi_teardrop(h, r, d = undef, center = true) //! A semi teardrop in the positive Y domain
-    render(convexity = 5)
-        extrude_if(h, center)
-            intersection() {
-                R = is_undef(d) ? r : d / 2;
-                teardrop(r = R, h = 0);
-
-                sq = R + 1;
-                translate([-sq, 0])
-                    square([2 * sq, sq]);
-            }
-
-module teardrop_plus(h, r, center = true, truncate = true) //! Slightly bigger teardrop to allow for the 3D printing staircase effect
-    teardrop(h, r + layer_height / 4, center, truncate);
-
-module tearslot(h, r, w, center = true) //! A horizontal slot that doesn't need support material
-    extrude_if(h, center)
+module teardrop(h, r, center = true, truncate = true, chamfer = 0) { //! For making horizontal holes that don't need support material, set ```truncate = false``` to make traditional RepRap teardrops that don't even need bridging
+    module teardrop_2d(r, truncate) {
         hull() {
-            translate([-w/2,0,0]) teardrop(r = r, h = 0);
-            translate([ w/2,0,0]) teardrop(r = r, h = 0);
+            circle4n(r);
+            if(truncate)
+                translate([0, r / 2])
+                    square([2 * r * (sqrt(2) - 1), r], center = true);
+            else
+                polygon([[0, 0], [eps, 0], [0, r * sqrt(2)]]);
         }
+    }
+
+    render(convexity = 5)
+        extrude_if(h, center)
+            teardrop_2d(r, truncate);
+
+    teardrop_chamfer(h, center, chamfer) {
+        linear_extrude(eps, center = true)
+            teardrop_2d(r + chamfer / 2, truncate);
+        translate_z(-chamfer / 2)
+            linear_extrude(eps, center = true)
+                teardrop_2d(r, truncate);
+    }
+}
+
+module semi_teardrop(h, r, d = undef, center = true, chamfer = 0) { //! A semi teardrop in the positive Y domain
+    module semi_teardrop_2d(r, d) {
+        intersection() {
+            R = is_undef(d) ? r : d / 2;
+            teardrop(r = R, h = 0);
+
+            sq = R + 1;
+            translate([-sq, 0])
+                square([2 * sq, sq]);
+        }
+    }
+
+    render(convexity = 5)
+        extrude_if(h, center)
+            semi_teardrop_2d(r, d);
+
+    teardrop_chamfer(h, center, chamfer) {
+        linear_extrude(eps, center = true)
+            semi_teardrop_2d(r + chamfer / 2, d);
+        translate_z(-chamfer / 2)
+            linear_extrude(eps, center = true)
+                semi_teardrop_2d(r, d);
+    }
+}
+
+module teardrop_plus(h, r, center = true, truncate = true, chamfer = 0) //! Slightly bigger teardrop to allow for the 3D printing staircase effect
+    teardrop(h, r + layer_height / 4, center, truncate, chamfer);
+
+module tearslot(h, r, w, center = true, chamfer = 0) { //! A horizontal slot that doesn't need support material
+    module tearslot_2d(r, w) {
+        hull() {
+            translate([-w / 2, 0]) teardrop(r = r, h = 0);
+            translate([w / 2, 0]) teardrop(r = r, h = 0);
+        }
+    }
 
-module vertical_tearslot(h, r, l, center = true) //! A vertical slot that doesn't need support material
     extrude_if(h, center)
+        tearslot_2d(r, w);
+
+    teardrop_chamfer(h, center, chamfer) {
+        linear_extrude(eps, center = true)
+            tearslot_2d(r + chamfer / 2, w);
+        translate_z(-chamfer / 2)
+            linear_extrude(eps, center = true)
+                tearslot_2d(r, w);
+    }
+}
+
+module vertical_tearslot(h, r, l, center = true, chamfer = 0) { //! A vertical slot that doesn't need support material
+    module vertical_tearslot_2d(r, l) {
         hull() {
             translate([0,  l / 2]) teardrop(0, r, true);
-            translate([0, -l / 2])
-                circle4n(r);
+            translate([0, -l / 2]) circle4n(r);
         }
+    }
+
+    extrude_if(h, center)
+        vertical_tearslot_2d(r, l);
+
+    teardrop_chamfer(h, center, chamfer) {
+        linear_extrude(eps, center = true)
+            vertical_tearslot_2d(r + chamfer / 2, l);
+        translate_z(-chamfer / 2)
+            linear_extrude(eps, center = true)
+                vertical_tearslot_2d(r, l);
+    }
+}
+
+module teardrop_chamfer(h, center, chamfer) { //! Helper module for adding chamfer to a teardrop
+    if(h && chamfer)
+        translate_z(center ? 0 : h / 2)
+            for(m = [0, 1])
+                mirror([0, 0, m])
+                    translate_z((h - eps ) / 2)
+                        hull()
+                            children();
+}
+

vitamins/ball_bearings.scad

@@ -18,7 +18,9 @@
 //
 BB624 = ["624", 4, 13, 5, "blue"];      // 624 ball bearing for idlers
 BB608 = ["608", 8, 22, 7, "OrangeRed"]; // 608 bearings for wades
+BB6200 = ["6200", 10, 30, 9, "black"];  // 6200 bearings for KP pillow blocks
+BB6201 = ["6201", 12, 32, 10, "black"]; // 6201 bearings for KP pillow blocks
 
-ball_bearings = [BB624, BB608];
+ball_bearings = [BB624, BB608, BB6200, BB6201];
 
 use <ball_bearing.scad>

vitamins/belt.scad

@@ -41,9 +41,7 @@ function no_point(str) = chr([for(c = str) if(c == ".") ord("p") else ord(c)]);
 // We model the belt path at the pitch radius of the pulleys and the pitch line of the belt to get an accurate length.
 // The belt is then drawn by offseting each side from the pitch line.
 //
-module belt(type, points, gap = 0, gap_pt = undef) { //! Draw a belt path given a set of points and pitch radii where the pulleys are. Closed loop unless a gap is specified
-    belt_colour = grey20;
-    tooth_colour = grey50;
+module belt(type, points, gap = 0, gap_pt = undef, belt_colour = grey20, tooth_colour = grey50) { //! Draw a belt path given a set of points and pitch radii where the pulleys are. Closed loop unless a gap is specified
     width = belt_width(type);
     pitch = belt_pitch(type);
     thickness = belt_thickness(type);

vitamins/green_terminal.scad

@@ -39,9 +39,8 @@ function gt_y_offset(type)     = type[13];  //! Offset of the pins from centre o
 function gt_y_offset2(type)    = type[14];  //! Offset of the pins screws from the screws
 function gt_tube_h(type)       = type[15];  //! Height of optional tubes around the screws
 
-module green_terminal(type, ways, skip = []) { //! Draw green terminal blocks, skip can be used to remove pins.
+module green_terminal(type, ways, skip = [], colour = "lime") { //! Draw green terminal blocks, skip can be used to remove pins.
     pitch = gt_pitch(type);
-
     imperial = str(pitch / inch(1));
     vitamin(str("green_terminal(", type[0], ", ", ways, "): Terminal block ", ways, " way ", len(imperial) < 5 ? str(pitch / inch(1), "\"") : str(pitch, "mm")));
     width = ways * pitch;
@@ -79,7 +78,7 @@ module green_terminal(type, ways, skip = []) { //! Draw green terminal blocks, s
                     }
             }
 
-        color("lime") {
+        color(colour) {
             rotate([90, 0, 0])
                 linear_extrude(height = pitch, center = true, convexity = 5)
                     polygon(points = [                          // Vertical section

vitamins/green_terminals.scad

@@ -18,6 +18,14 @@
 //
 // Green terminal blocks
 //
+
+//                                            f        b                               y   y
+//                                   h        h    f   h    b   s      f               o   o
+//                       p     d     e        e    d   e    d   c      r               f   f    t
+//                       i     e     i        i    e   i    e   r      o   b    b      f   f    u
+//                       t     p     g  t     g    p   g    p   e      n   o    o      s   s    b
+//                       c     t     h  o     h    t   h    t   w      t   x    x      e   t    e
+//                       h     h     t  p     t    h   t    h   r      t   w    h      t   2    h
 gt_2p54 = ["gt_2p54", 2.54,  6.6,   10, 3,    6, 0.4,  6.4, 1,  1,    0.2, 2,   2,     0,  0,   0];
 gt_3p5  = ["gt_3p5",  3.5,   7.3,  8.5, 4,    5, 0.4,  4,   0,  1.35, 0.4, 1.8, 2,     0,  0,   0];
 gt_6p35 = ["gt_6p35", 6.35, 12.6, 17.4, 6.8, 12, 0.4, 11,   2,  2.7,  0.8, 3.4, 4.2, 1.8,  1.1, 21.4];

vitamins/kp_pillow_block.scad

@@ -0,0 +1,117 @@
+//
+// NopSCADlib Copyright Chris Palmer 2018
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+
+//
+//! KP pillow block bearings
+//
+include <../core.scad>
+use <../utils/tube.scad>
+
+include <screws.scad>
+use <washer.scad>
+use <ball_bearing.scad>
+
+kp_pillow_block_color = grey70;
+
+function kp_diameter(type)        = type[1]; //! Rod hole diameter
+function kp_hole_offset(type)     = type[2]; //! Rod hole offset
+function kp_size(type)            = [type[3],type[8],type[5]]; //! Size of bracket
+function kp_base_height(type)     = type[7]; //! Height of base containing the bolts
+function kp_screw_separation(type) = type[4]; //! Separation of bolts in the base
+
+
+module kp_pillow_block(type) { //! Draw the KP pillow block
+    vitamin(str("kp_pillow_block(", type[0], "): ", type[0], " pillow block"));
+
+    d = kp_diameter(type);
+    H = kp_hole_offset(type);
+    L = kp_size(type)[0];
+    J = kp_screw_separation(type);
+    A = kp_size(type)[2];// sizeZ, includes protruding center
+    N = type[6];
+    H1 = kp_base_height(type);
+    H0 = kp_size(type)[1];
+    K = type[9];
+    S = type[10];
+    b = type[11];
+    bolthole_radius = type[12];
+
+    color(kp_pillow_block_color)
+        translate([0, -H, 0]) {
+            fillet = 1;
+            squareSizeX = (L - H0) / 2 + fillet;
+            rotate([-90, 0, 0])
+                linear_extrude(H1)
+                    difference() {
+                        union() {
+                            for(i = [-L / 2, L / 2 - squareSizeX])
+                                translate([i, -A / 2])
+                                    rounded_square([squareSizeX, A], fillet, center = false);
+                        }
+                        for(i = [-J / 2, J / 2])
+                            translate([i, 0])
+                                circle(r = bolthole_radius);
+                    }
+
+            translate_z(-A / 2) {
+                for(x = [- L / 2 + squareSizeX - fillet, L / 2 - squareSizeX + fillet - 2])
+                    translate([x, 0, 0])
+                        cube([2, H, A]);
+                stripLength = J - 2 * bolthole_radius;
+                stripThickness = 4;
+                translate([-stripLength / 2, 0, (H1 + stripThickness) / 2])
+                    cube([stripLength, H1, stripThickness]);
+                translate([0 , H, 0])
+                    tube(H0 / 2, b / 2, A, center = false);
+            }
+        }
+
+    not_on_bom() no_explode()
+        ball_bearing(type[13]);
+}
+
+module kp_pillow_block_hole_positions(type) { //! Place children at hole positions
+    for(x = [-kp_screw_separation(type), kp_screw_separation(type)])
+        translate([x / 2, kp_base_height(type) - kp_hole_offset(type), 0])
+            rotate([-90,0,0])
+                children();
+}
+
+module kp_pillow_block_assembly(type, part_thickness = 2, screw_type = M5_cap_screw, nut_type = undef) { //! Assembly with fasteners in place
+    kp_pillow_block(type);
+
+    screw_washer_thickness = washer_thickness(screw_washer(screw_type));
+    nut_type = is_undef(nut_type) ? screw_nut(screw_type) : nut_type;
+    nut_washer_type = nut_washer(nut_type);
+    nut_washer_thickness = nut_washer_type ? washer_thickness(nut_washer_type) : 0;
+
+    nut_offset = kp_base_height(type) + part_thickness;
+    screw_length = screw_shorter_than(nut_offset + screw_washer_thickness +  nut_thickness(nut_type) + nut_washer_thickness);
+
+    kp_pillow_block_hole_positions(type) {
+        screw_and_washer(screw_type, screw_length);
+
+        translate_z(-nut_offset)
+            vflip()
+                if(nut_washer_type)
+                    nut_and_washer(nut_type);
+                else
+                    sliding_t_nut(nut_type);
+    }
+}
+

vitamins/kp_pillow_blocks.scad

@@ -0,0 +1,35 @@
+//
+// NopSCADlib Copyright Chris Palmer 2018
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+
+//
+//! KP pillow block bearings
+//
+
+include <../core.scad>
+include <screws.scad>
+include <ball_bearings.scad>
+
+//                 d   H   L   J   A    N  H1  H0     K  S  b   bolthole             bearing
+KP08 =  ["KP08",   8, 18, 55, 42, 13, 4.5,  5, 29,  0.0, 0, 22, M4_clearance_radius, BB608];
+KP000 = ["KP000", 10, 18, 67, 53, 16, 7.0,  6, 35, 14.0, 4, 30, M6_clearance_radius, BB6200];
+KP001 = ["KP001", 12, 19, 71, 56, 16, 7.0,  6, 38, 14.5, 4, 32, M6_clearance_radius, BB6201];
+
+kp_pillow_blocks = [KP08,  KP000, KP001];
+
+use <kp_pillow_block.scad>

vitamins/nut.scad

@@ -132,75 +132,60 @@ module wingnut(type) { //! Draw a wingnut
 }
 
 module sliding_t_nut(type) {
-    vitamin(str("sliding_t_nut(", type[0], "): Nut M", nut_size(type), " sliding T"));
+    hammerNut = type[10];
+    vitamin(str("sliding_t_nut(", type[0], "): Nut M", nut_size(type), hammerNut ? " hammer" : " sliding T"));
 
-    size = [type[7], type[2], nut_thickness(type)];
+    size = [type[7], type[2], nut_thickness(type, true)];
     tabSizeY1 = type[8];
     tabSizeY2 = type[9];
-    tabSizeZ = type[10];
+    tabSizeZ = nut_thickness(type);
     holeRadius  = nut_size(type) / 2;
 
-    if($preview)
-        color(grey80)
-            extrusionSlidingNut(size, tabSizeY1, tabSizeY2, tabSizeZ, holeRadius);
-
-}
-
-module hammer_nut(type) {
-    vitamin(str("hammer_nut(", type[0], "): Nut M", nut_size(type), " hammer"));
-
-    size = [type[7], type[2], nut_thickness(type)];
-    tabSizeY1 = type[8];
-    tabSizeY2 = type[9];
-    tabSizeZ = type[10];
-    holeRadius  = nut_size(type) / 2;
-
-    if($preview)
-        color(grey80)
-            extrusionSlidingNut(size, tabSizeY1, tabSizeY2, tabSizeZ, holeRadius, 0, hammerNut = true);
-
+    color(grey80)
+        extrusionSlidingNut(size, tabSizeY1, tabSizeY2, tabSizeZ, holeRadius, 0, hammerNut);
 }
 
 module extrusionSlidingNut(size, tabSizeY1, tabSizeY2, tabSizeZ, holeRadius, holeOffset = 0, hammerNut = false) {
     // center section
-    linear_extrude(size[2] - tabSizeZ)
-        difference() {
-            square([size[0], size[1]], center = true);
-            if(hammerNut) {
-                translate([size[0] / 2, size[1] / 2])
-                    rotate(180)
-                        fillet(1);
-                translate([-size[0] / 2, -size[1] / 2])
-                    fillet(1);
-            }
-            if(holeRadius)
-                translate([holeOffset, 0])
-                    circle(holeRadius);
-        }
-    translate_z(size[2] - tabSizeZ)
-        linear_extrude(tabSizeZ)
+    stem_h = size.z - tabSizeZ;
+    translate_z(-stem_h)
+        linear_extrude(stem_h)
             difference() {
-                square([size[0], tabSizeY2], center = true);
+                square([size.x, size.y], center = true);
+                if(hammerNut) {
+                    translate([size.x / 2, size.y / 2])
+                        rotate(180)
+                            fillet(1);
+                    translate([-size.x / 2, -size.y / 2])
+                        fillet(1);
+                }
                 if(holeRadius)
                     translate([holeOffset, 0])
                         circle(holeRadius);
             }
+    linear_extrude(tabSizeZ)
+        difference() {
+            square([size.x, tabSizeY2], center = true);
+            if(holeRadius)
+                translate([holeOffset, 0])
+                    circle(holeRadius);
+        }
 
     thread_d = 2 * holeRadius;
     if(show_threads)
-        translate([holeOffset, 0])
-            female_metric_thread(thread_d, metric_coarse_pitch(thread_d), size[2], center = false);
+        translate([holeOffset, 0, -stem_h])
+            female_metric_thread(thread_d, metric_coarse_pitch(thread_d), size.z, center = false);
 
     // add the side tabs
     for(m = [0, 1])
         mirror([0, m, 0])
-            translate([0, tabSizeY2 / 2, size[2] - tabSizeZ]) {
+            translate([0, tabSizeY2 / 2]) {
                 cubeZ = 1;
-                translate([-size[0] / 2, 0, 0])
-                    cube([size[0], (tabSizeY1 - tabSizeY2) / 2, cubeZ]);
+                translate([-size.x / 2, 0])
+                    cube([size.x, (tabSizeY1 - tabSizeY2) / 2, cubeZ]);
                 translate_z(cubeZ)
                     rotate([0, -90, 0])
-                        right_triangle(tabSizeZ - cubeZ, (tabSizeY1 - tabSizeY2) / 2, size[0], center = true);
+                        right_triangle(tabSizeZ - cubeZ, (tabSizeY1 - tabSizeY2) / 2, size.x, center = true);
             }
 }
 

vitamins/nuts.scad

@@ -28,35 +28,35 @@ M5_nut_depth = 4;
 M6_nut_depth = 5;
 M8_nut_depth = 6.5;
 
-//                            s    r    t    n     w              t
-//                            c    a    h    y     a              r
-//                            r    d    i    l     s              a
-//                            e    i    c    o     h              p
-//                            w    u    k    c     e
-//                                 s    n          r              d
-//                                      e    t                    e
-//                                      s    h                    p
-//                                      s    k                    t
-//                                                                h
+//                                      s    r    t    n     w              t
+//                                      c    a    h    y     a              r
+//                                      r    d    i    l     s              a
+//                                      e    i    c    o     h              p
+//                                      w    u    k    c     e
+//                                           s    n          r              d
+//                                                e    t                    e
+//                                                s    h                    p
+//                                                s    k                    t
+//                                                                          h
 //
-M2_nut      = ["M2_nut",      2,   4.9, 1.6, 2.4,  M2_washer,     M2_nut_trap_depth];
-M2p5_nut    = ["M2p5_nut",    2.5, 5.8, 2.2, 3.8,  M2p5_washer, M2p5_nut_trap_depth];
-M3_nut      = ["M3_nut",      3,   6.4, 2.4, 4,    M3_washer,     M3_nut_trap_depth];
-M4_nut      = ["M4_nut",      4,   8.1, 3.2, 5,    M4_washer,     M4_nut_trap_depth];
-M5_nut      = ["M5_nut",      5,   9.2, 4,   6.25, M5_washer,     M5_nut_depth];
-M6_nut      = ["M6_nut",      6,  11.5, 5,   8,    M6_washer,     M6_nut_depth];
-M6_half_nut = ["M6_half_nut", 6,  11.5, 3,   8,    M6_washer,     3];
-M8_nut      = ["M8_nut",      8,  15,   6.5, 8,    M8_washer,     M8_nut_depth];
-toggle_nut  = ["toggle_nut",  6.1, 9.2, 1.5, 1.5,  M6_washer,     1.5];
+M2_nut      =      ["M2_nut",           2,   4.9, 1.6, 2.4,  M2_washer,     M2_nut_trap_depth];
+M2p5_nut    =      ["M2p5_nut",         2.5, 5.8, 2.2, 3.8,  M2p5_washer, M2p5_nut_trap_depth];
+M3_nut      =      ["M3_nut",           3,   6.4, 2.4, 4,    M3_washer,     M3_nut_trap_depth];
+M4_nut      =      ["M4_nut",           4,   8.1, 3.2, 5,    M4_washer,     M4_nut_trap_depth];
+M5_nut      =      ["M5_nut",           5,   9.2, 4,   6.25, M5_washer,     M5_nut_depth];
+M6_nut      =      ["M6_nut",           6,  11.5, 5,   8,    M6_washer,     M6_nut_depth];
+M6_half_nut =      ["M6_half_nut",      6,  11.5, 3,   8,    M6_washer,     3];
+M8_nut      =      ["M8_nut",           8,  15,   6.5, 8,    M8_washer,     M8_nut_depth];
+toggle_nut  =      ["toggle_nut",       6.1, 9.2, 1.5, 1.5,  M6_washer,     1.5];
 
-M4_wingnut  = ["M4_wingnut",  4,  10,   3.75,8,    M4_washer,     0, 22, 10, 6, 3];
+M4_wingnut  =      ["M4_wingnut",       4,  10,   3.75,8,    M4_washer,     0, 22, 10, 6, 3];
 
-//                                                                          sx  ty1 ty2 tz
-M3_sliding_t_nut = ["M3_sliding_t_nut", 3, 6, 4.0, 0,    M3_washer,     0,  10,  10,  6, 3];
-M4_sliding_t_nut = ["M4_sliding_t_nut", 4, 6, 4.5, 0,    M4_washer,     0,  11,  10,  6, 3.25];
-M5_sliding_t_nut = ["M5_sliding_t_nut", 5, 6, 4.5, 0,    M5_washer,     0,  11,  10,  7, 3.25];
-M3_hammer_nut =    ["M3_hammer_nut",    3, 6, 4.0, 0,    M3_washer,     0, 5.5,  10,  6, 2.75];
-M4_hammer_nut =    ["M4_hammer_nut",    4, 6, 4.5, 0,    M4_washer,     0, 5.5,  10,  6, 3.25];
+//                                                                              sx  ty1 ty2 hammer
+M3_sliding_t_nut = ["M3_sliding_t_nut", 3,   6,   3.0, 4.0,  false,         0,  10,  10,  6, false];
+M4_sliding_t_nut = ["M4_sliding_t_nut", 4,   6,   3.25,4.5,  false,         0,  11,  10,  6, false];
+M5_sliding_t_nut = ["M5_sliding_t_nut", 5,   6,   3.25,4.5,  false,         0,  11,  10,  7, false];
+M3_hammer_nut =    ["M3_hammer_nut",    3,   6,   2.75,4.0,  false,         0, 5.5,  10,  6, true];
+M4_hammer_nut =    ["M4_hammer_nut",    4,   6,   3.25,4.5,  false,         0, 5.5,  10,  6, true];
 
 nuts = [M2_nut, M2p5_nut, M3_nut, M4_nut, M5_nut, M6_nut, M8_nut];
 

vitamins/pcb.scad

@@ -27,6 +27,7 @@ include <screws.scad>
 include <buttons.scad>
 include <green_terminals.scad>
 include <pin_headers.scad>
+include <microswitches.scad>
 
 use <../utils/rounded_cylinder.scad>
 use <../utils/dogbones.scad>
@@ -200,6 +201,13 @@ module jack(cutout = false) { //! Draw 3.5mm jack
                 }
 }
 
+module buzzer(height, diameter, colour) { //! Draw PCB buzzer with specified height, diameter and color
+    color (colour)
+        tube(or = diameter / 2, ir = height > 5 ? 1 : 0.75, h = height);
+    color("white")
+        cylinder(d = 2, h = max(height - 3 , 0.5));
+}
+
 function hdmi_depth(type)     = type[2]; //! Front to back depth
 function hdmi_width1(type)    = type[3]; //! Inside width at the top
 function hdmi_width2(type)    = type[4]; //! Inside width at the bottom
@@ -710,6 +718,7 @@ module pcb_component(comp, cutouts = false, angle = undef) { //! Draw pcb compon
         if(show(comp, "usb_Ax2")) usb_Ax2(cutouts);
         if(show(comp, "usb_uA")) usb_uA(cutouts);
         if(show(comp, "usb_B")) usb_B(cutouts);
+        if(show(comp, "buzzer")) buzzer(param(4, 9), param(5, 12), param(6, grey20));
         if(show(comp, "jack")) jack(cutouts);
         if(show(comp, "barrel_jack")) barrel_jack(cutouts);
         if(show(comp, "hdmi")) hdmi(hdmi_full, cutouts);
@@ -728,6 +737,7 @@ module pcb_component(comp, cutouts = false, angle = undef) { //! Draw pcb compon
             color(comp[7]) if(!cutouts) translate_z(comp[6] / 2) cube([comp[4], comp[5], comp[6]], center = true);
                            else if(comp[8]) translate([-50, 0, comp[6] / 2 - panel_clearance]) cube([100, comp[5] + 2 * panel_clearance, comp[6] + 2 * panel_clearance], center = true);
         if(show(comp, "button_6mm")) square_button(button_6mm);
+        if(show(comp, "microswitch")) translate_z(microswitch_thickness(comp[4])/2) microswitch(comp[4]);
         if(show(comp, "pcb")) if(!cutouts) translate_z(comp[4]) pcb(comp[5]);
         if(show(comp, "standoff")) if(!cutouts) standoff(comp[4], comp[5], comp[6], comp[7]);
         if(show(comp, "uSD")) uSD(comp[4], cutouts);

vitamins/pcbs.scad

@@ -17,6 +17,7 @@
 // If not, see <https://www.gnu.org/licenses/>.
 //
 include <screws.scad>
+include <microswitches.scad>
 //
 //                                   l      w      t    r     h     l  c        b     h
 //                                   e      i      h    a     o     a  o        o     o
@@ -284,7 +285,6 @@ ArduinoLeonardo = ["ArduinoLeonardo", "Arduino Leonardo", 68.58, 53.34, 1.6, 0,
     M2p5_pan_screw
    ];
 
-
 Keyes5p1 = ["Keyes5p1", "Keyes5.1 Arduino Uno expansion board", 68.58, 53.34, 1.6, 0, 3.3, 0, "#2140BE", false, [[15.24, 50.8],[66.04, 35.56],[66.04, 7.62],[13.97, 2.54]],
     [[30.226, -2.54, 0, "-2p54header", 10, 1],
      [54.61,  -2.54, 0, "-2p54header", 8, 1],
@@ -339,20 +339,18 @@ PERF74x51 = ["PERF74x51", "Perfboard 74 x 51mm", 74, 51, 1.0, 0, 3.0, 0, "sienna
 
 PSU12V1A = ["PSU12V1A", "PSU 12V 1A", 67, 31, 1.7, 0, 3.9, 0, "green", true, [[3.5, 3.5], [-3.5, 3.5], [-3.5, -3.5], [3.5, -3.5]], [], []];
 
+include <microswitches.scad>
+
 RAMPSEndstop = ["RAMPSEndstop", "RAMPS Endstop Switch",
     40.0, 16.0, 1.6, 0, 2.54, 0, "red",  false,
     [
         [2, 2], [2, 13.5], [17, 13.5], [36, 13.5]
     ],
     [
-        [ 12,    8,   -90, "jst_xh", 3, true, "white", "silver"],
-        [ 26,   13.5,   0, "chip", 12, 4, 5.5],
-        [ 26,   10.5,   0, "chip", 12, 2, 5.5, "white"],
-        [ 27.5, 17,    15, "chip", 15, 0.5, 4.5, "silver"],
+        [ 26.5, 12.75,  0, "microswitch", small_microswitch],
     ],
     []];
 
-
 pcbs = [ExtruderPCB, PI_IO, RPI0, EnviroPlus, RPI3, ArduinoUno3, ArduinoLeonardo, Keyes5p1, PERF80x20, PERF70x50, PERF70x30, PERF60x40, PERF74x51, PSU12V1A, DuetE, Duex2, Duex5, Melzi, ZC_A0591, RAMPSEndstop];
 
 use <pcb.scad>

vitamins/rocker.scad

@@ -25,7 +25,7 @@ use <spade.scad>
 
 function rocker_part(type)     = type[1];   //! Part description
 function rocker_slot_w(type)   = type[2];   //! Panel slot width
-function rocker_slot_h(type)   = type[3];   //! Panel slow height
+function rocker_slot_h(type)   = type[3];   //! Panel slot height
 function rocker_flange_w(type) = type[4];   //! Flange width
 function rocker_flange_h(type) = type[5];   //! Flange height
 function rocker_flange_t(type) = type[6];   //! Flange thickness
@@ -37,7 +37,7 @@ function rocker_pivot(type)    = type[11];  //! Pivot distance from the back of
 function rocker_button(type)   = type[12];  //! How far the button extends from the bezel
 function rocker_spades(type)   = type[13];  //! Spade types and positions
 
-module rocker(type) { //! Draw the specified rocker switch
+module rocker(type, colour) { //! Draw the specified rocker switch
     vitamin(str("rocker(", type[0], "): ", rocker_part(type)));
 
     bezel = rocker_bezel(type);
@@ -65,7 +65,7 @@ module rocker(type) { //! Draw the specified rocker switch
                 rounded_rectangle([rocker_width(type), rocker_height(type), rocker_depth(type) + eps], 0.5, center = false);
         }
         if(rocker_pivot(type))
-            color(grey30)
+            color(colour ? colour : grey30)
                 translate_z(rocker_pivot(type))
                     rotate([90, 0, 90])
                         linear_extrude(height = rocker_w, center = true)
@@ -78,7 +78,7 @@ module rocker(type) { //! Draw the specified rocker switch
                             }
 
         else
-            color("red") cube([rocker_w, rocker_h, 2 * (rocker_flange_t(type) + rocker_button(type))], center = true);
+            color(colour ? colour : "red") cube([rocker_w, rocker_h, 2 * (rocker_flange_t(type) + rocker_button(type))], center = true);
 
         for(spade = rocker_spades(type))
             translate([spade[2], spade[3], -rocker_depth(type)])

vitamins/rod.scad

@@ -66,7 +66,7 @@ module leadscrew(d , l, lead, starts, center = true) { //! Draw a leadscrew with
 
     translate_z(center ? 0 : l / 2)
         if(show_threads && pitch)
-            thread(d - pitch, lead, l, thread_profile(pitch / 2, pitch * 0.366, 30), top = 45, bot = 45, starts = starts, center = center, colour = rod_colour);
+            thread(d - pitch, lead, l, thread_profile(pitch / 2, pitch * 0.366, 30), top = 45, bot = 45, starts = starts, colour = rod_colour);
         else
             color(leadscrew_colour)
                 hull() {

vitamins/screw.scad

@@ -59,7 +59,7 @@ function screw_shorter_than(x) = x >= 20 ? floor(x / 5) * 5 : //! Returns longes
 function screw_smaller_than(d) = d >= 2.5 && d < 3 ? 2.5 : floor(d); // Largest diameter screw less than or equal to specified diameter
 
 module screw(type, length, hob_point = 0, nylon = false) { //! Draw specified screw, optionally hobbed or nylon
-    description = str("Screw ", nylon ? "Nylon " : "", type[1], " x ", length, "mm", hob_point ? str(", hobbed at ", hob_point) : "");
+    description = str("Screw ", nylon ? "Nylon " : "", type[1], length < 10 ? " x  " : " x ", length, "mm", hob_point ? str(", hobbed at ", hob_point) : "");
     vitamin(str("screw(", type[0], "_screw, ", length, arg(hob_point, 0, "hob_point"), arg(nylon, false, "nylon"), "): ", description));
 
     head_type   = screw_head_type(type);

vitamins/scs_bearing_block.scad

@@ -0,0 +1,157 @@
+//
+// NopSCADlib Copyright Chris Palmer 2020
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+
+//
+// SCSnUU and SCSnLUU bearing blocks
+//
+
+
+include <NopSCADlib/core.scad>
+use <NopSCADlib/vitamins/screw.scad>
+use <NopSCADlib/vitamins/nut.scad>
+use <NopSCADlib/vitamins/washer.scad>
+use <NopSCADlib/vitamins/linear_bearing.scad>
+
+function scs_size(type)                 = [type[4],type[6],type[5]]; //! Size of scs bracket bounding block
+function scs_hole_offset(type)          = type[2]; //! Offset of bearing hole from base of block
+function scs_block_center_height(type)  = type[6];  //! Height of the center of the block
+function scs_block_side_height(type)    = type[7];  //! Height of the side of the block, this determines the minimum screw length
+function scs_screw(type)                = type[11]; //! Screw type
+function scs_screw_separation_x(type)   = type[8];  //! Screw separation in X direction
+function scs_screw_separation_z(type)   = type[9];  //! Screw separation in Z direction
+function scs_bearing(type)              = type[14]; //! Linear bearing used
+
+
+sks_bearing_block_color = grey90;
+
+module scs_bearing_block(type) { //! Draw the specified SCS bearing block
+    vitamin(str("scs_bearing_block(", type[0], "): ", type[0], " bearing block"));
+
+    T = type[1];
+    h = scs_hole_offset(type);
+    E = type[3];
+    W = scs_size(type)[0];
+    assert(W == 2 * E, str("W or E wrong for scs_bearing_block", type[0]));
+    L = scs_size(type)[2];
+    F = scs_block_center_height(type);
+    G = scs_block_side_height(type);
+    B = scs_screw_separation_x(type);
+    C = scs_screw_separation_z(type);
+    K = type[10];
+    S1 = scs_screw(type);
+    S2 = type[12];
+    L1 = type[13];
+
+    module right_trapezoid(base, top, height, h = 0, center = true) {//! A right angled trapezoid with the 90&deg; corner at the origin. 3D when ```h``` is nonzero, otherwise 2D
+        extrude_if(h, center = center)
+            polygon(points = [ [0,0], [base, 0], [top, height], [0, height] ]);
+    }
+
+    boltHoleRadius = screw_clearance_radius(S1);
+    footHeight = min(0.75, (G - bearing_dia(scs_bearing(type)) - 1.5) / 2); // estimate, not specified on drawings
+
+    color(sks_bearing_block_color) {
+        linear_extrude(L, center = true) {
+            bearingRadius = bearing_dia(scs_bearing(type)) / 2;
+            // center section with bearing hole
+            difference() {
+                union() {
+                    translate([-(B - 2 * boltHoleRadius) / 2, -h + footHeight])
+                        square([B - 2 * boltHoleRadius, G - footHeight]);
+                    for(m = [0, 1])
+                        mirror([m, 0, 0])
+                            translate([0 , G - h])
+                                right_trapezoid(bearingRadius, bearingRadius -F + G, F - G);
+                }
+                circle(r = bearingRadius);
+            }
+            // add the sides
+            for(m = [0, 1])
+                mirror([m, 0, 0]) {
+                    trapezoidX = boltHoleRadius - 0.5; // estimate, not specified on drawings
+                    sideX = 2 * (K - boltHoleRadius - trapezoidX);
+                    chamfer = 0.5;
+                    assert(sideX > chamfer, "trapezoidX too large in scs_bearing_block");
+                    translate([B / 2 + boltHoleRadius, -h]) {
+                        square([sideX - chamfer, G]);
+                        translate([sideX, 0])
+                            rotate(90)
+                                right_trapezoid(G - chamfer, G, chamfer);
+                        translate([sideX, 0]) {
+                            right_trapezoid(trapezoidX - footHeight, trapezoidX, footHeight);
+                            translate([trapezoidX, footHeight])
+                                rotate(90)
+                                    right_trapezoid(T - footHeight, L1 - footHeight, trapezoidX);
+                        }
+                    }
+                    translate([B / 2 - boltHoleRadius, -h])
+                        mirror([1, 0, 0])
+                            right_trapezoid(boltHoleRadius,  boltHoleRadius + footHeight, footHeight);
+                }
+        }
+        // side blocks with bolt holes
+        for(x = [-B / 2, B / 2])
+            translate([x, G / 2 - h, 0])
+                rotate([90, 0, 0])
+                    linear_extrude(G, center = true)
+                        difference() {
+                            square([boltHoleRadius * 2, L], center = true);
+                            for (y = [-C / 2, C / 2])
+                                translate([0, y])
+                                    circle(r = boltHoleRadius);
+                        }
+    }
+    not_on_bom() no_explode()
+        linear_bearing(scs_bearing(type));
+}
+
+module scs_bearing_block_hole_positions(type) { //! Place children at hole positions
+    screw_separation_x = scs_screw_separation_x(type);
+    screw_separation_z = scs_screw_separation_z(type);
+    G = scs_block_side_height(type);
+    h = scs_hole_offset(type);
+
+    for(x = [-screw_separation_x, screw_separation_x], z = [-screw_separation_z, screw_separation_z])
+        translate([x / 2, G - h, z / 2])
+            rotate([-90, 0, 0])
+                children();
+}
+
+module scs_bearing_block_assembly(type, part_thickness, screw_type, nut_type) { //! Assembly with screws and nuts in place
+
+    scs_bearing_block(type);
+
+    screw_type = is_undef(screw_type) ? scs_screw(type) : screw_type;
+    nut_type = is_undef(nut_type) ? screw_nut(screw_type) : nut_type;
+    washer_type = nut_washer(nut_type);
+    washer_thickness = washer_type ? washer_thickness(washer_type) : 0;
+
+    G = scs_block_side_height(type);
+    nut_offset = G + part_thickness + nut_thickness(nut_type) + washer_thickness;
+    screw_length = screw_longer_than(nut_offset);
+
+    scs_bearing_block_hole_positions(type) {
+        screw(screw_type, screw_length);
+
+        translate_z(-nut_offset)
+            nut(nut_type)
+                if (washer_type)
+                    washer(washer_type);
+    }
+}

vitamins/scs_bearing_blocks.scad

@@ -0,0 +1,44 @@
+//
+// NopSCADlib Copyright Chris Palmer 2020
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+
+//
+// SCS bearing blocks
+//
+
+include <NopSCADlib/core.scad>
+include <NopSCADlib/vitamins/screws.scad>
+include <NopSCADlib/vitamins/linear_bearings.scad>
+
+//                        T  h   E   W   L   F     G   B     C   K     S1            S2   L1  LB
+SCS6UU    = ["SCS6UU",    6,  9, 15, 30, 25, 18,   15, 20,   15, 5,    M4_cap_screw, 3.4,  8, LM6UU];
+SCS8UU    = ["SCS8UU",    6, 11, 17, 34, 30, 22,   18, 24,   18, 5,    M4_cap_screw, 3.4,  8, LM8UU];
+SCS10UU   = ["SCS10UU",   8, 13, 20, 40, 35, 26,   21, 28,   21, 6,    M5_cap_screw, 4.3, 12, LM10UU];
+SCS12UU   = ["SCS12UU",   8, 15, 21, 42, 36, 28,   24, 30.5, 26, 5.75, M5_cap_screw, 4.3, 12, LM12UU];
+SCS16UU   = ["SCS16UU",   9, 19, 25, 50, 44, 38.5, 32.5, 36, 34, 7,    M5_cap_screw, 4.3, 12, LM16UU];
+
+SCS8LUU   = ["SCS8LUU",   6, 11, 17, 34, 58, 22,   18, 24,   42, 5,    M4_cap_screw, 3.4,  8, LM8LUU];
+SCS10LUU  = ["SCS10LUU",  8, 13, 20, 40, 68, 26,   21, 28,   45, 6,    M5_cap_screw, 4.3, 12, LM10LUU];
+SCS12LUU  = ["SCS12LUU",  8, 15, 21, 42, 70, 28,   24, 30.5, 50, 5.75, M5_cap_screw, 4.3, 12, LM12LUU];
+SCS16LUU  = ["SCS16LUU",  9, 19, 25, 50, 85, 38.5, 32.5, 36, 60, 7,    M5_cap_screw, 4.3, 12, LM16LUU];
+
+
+scs_bearing_blocks = [SCS6UU, SCS8UU,  SCS10UU, SCS12UU, SCS16UU];
+scs_bearing_blocks_long = [SCS8LUU,  SCS10LUU, SCS12LUU, SCS16LUU];
+
+use <scs_bearing_block.scad>

vitamins/sk_bracket.scad

@@ -0,0 +1,125 @@
+//
+// NopSCADlib Copyright Chris Palmer 2018
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+
+//
+//! SK shaft support brackets
+//
+include <../core.scad>
+include <../utils/fillet.scad>
+
+include <screws.scad>
+use <washer.scad>
+
+sk_bracket_color = grey70;
+
+function sk_diameter(type)        = type[1]; //! Rod hole diameter
+function sk_hole_offset(type)     = type[2]; //! Rod hole offset
+function sk_size(type)            = [type[4],type[6],type[5]]; //! Size of bracket
+function sk_base_height(type)     = type[7]; //! Height of base containing the screws
+function sk_screw_separation(type) = type[9]; //! Separation of screws in the base
+
+module sk_bracket(type) { //! SK shaft support bracket
+    vitamin(str("sk_bracket(", type[0], "): SK", sk_diameter(type), " shaft support bracket"));
+
+    d = sk_diameter(type);
+    h = sk_hole_offset(type);
+    E = type[3];
+    W = sk_size(type)[0];
+    L = sk_size(type)[2];
+    F = sk_size(type)[1];
+    G = sk_base_height(type);
+    P = type[8];
+    B = sk_screw_separation(type);
+    S = type[10];
+    bolthole_radius = type[11];
+
+    color(sk_bracket_color) {
+        translate([0 , -h, 0]) {
+            fillet = 0.5;
+            rotate([-90, 0, 0])
+                linear_extrude(G)
+                    difference() {
+                        translate([-(W - 2*fillet) / 2, -L / 2, 0])
+                            square([W - 2 * fillet, L]);
+                        translate([-B / 2, 0])
+                            circle(r = bolthole_radius);
+                        translate([B / 2, 0])
+                            circle(r = bolthole_radius);
+                    }
+            for(x = [W / 2 - 2 * fillet, -W / 2 + 2 * fillet])
+                translate([x, G / 2, 0])
+                    rounded_rectangle([4 * fillet, G, L], fillet);
+        }
+
+        translate([0, -h, -L /2])
+            linear_extrude(L) {
+                fillet = 0.75;
+                difference() {
+                    translate([-P / 2, 0])
+                        rounded_square([P, F], fillet, center = false);
+                    cut_width = 1;
+                    translate([-cut_width / 2, h + cut_width])
+                        square([cut_width, F - h]);
+                    translate([0, h])
+                        circle(d = d);
+                }
+                translate([P/2,G])
+                    fillet(fillet, 0);
+                translate([-P/2,G])
+                    rotate(90)
+                        fillet(fillet, 0);
+            }
+    }
+    // Add the retaining bolt. No hole was cut, since it is only for display.
+    color(grey20)
+        translate([P / 2 - screw_head_height(M3_cap_screw) / 2, (F - h + d / 2) / 2, 0])
+            rotate([0,90,0])
+                not_on_bom() no_explode()
+                    screw(M3_cap_screw, P - screw_head_height(M3_cap_screw) / 2 + eps);
+}
+
+module sk_bracket_hole_positions(type) { //! Place children at hole positions
+    for (x = [-sk_screw_separation(type), sk_screw_separation(type)])
+        translate([x / 2, sk_base_height(type) - sk_hole_offset(type), 0])
+            rotate([-90, 0, 0])
+                children();
+}
+
+module sk_bracket_assembly(type, part_thickness = 2, screw_type = M5_cap_screw, nut_type = undef) { //! Assembly with fasteners in place
+    sk_bracket(type);
+
+    screw_type = is_undef(screw_type) ? scs_screw(type) : screw_type;
+    screw_washer_thickness = washer_thickness(screw_washer(screw_type));
+    nut_type = is_undef(nut_type) ? screw_nut(screw_type) : nut_type;
+    nut_washer_type = nut_washer(nut_type);
+    nut_washer_thickness = nut_washer_type ? washer_thickness(nut_washer_type) : 0;
+
+    nut_offset = sk_base_height(type) + part_thickness;
+    screw_length = nut_washer_type ? screw_longer_than(nut_offset + screw_washer_thickness + nut_washer_thickness + nut_thickness(nut_type))
+                                   : screw_shorter_than(nut_offset + screw_washer_thickness + nut_thickness(nut_type) + 2);
+
+    sk_bracket_hole_positions(type) {
+        screw_and_washer(screw_type, screw_length);
+        translate_z(-nut_offset)
+            vflip()
+                if(nut_washer_type)
+                    nut_and_washer(nut_type);
+                else
+                    sliding_t_nut(nut_type);
+    }
+}

vitamins/sk_brackets.scad

@@ -0,0 +1,35 @@
+//
+// NopSCADlib Copyright Chris Palmer 2018
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+
+//
+// SK shaft support brackets
+//
+
+include <../core.scad>
+include <../vitamins/screws.scad>
+
+//               d   h   E   W   L   F    G   P   B    S  bolthole
+SK8  = ["SK8",   8, 20, 21, 42, 14, 32.8, 6, 18, 32, 5.5, M5_clearance_radius];
+SK10 = ["SK10", 10, 20, 21, 42, 14, 32.8, 6, 18, 32, 5.5, M5_clearance_radius];
+SK12 = ["SK12", 12, 23, 21, 42, 14, 37.5, 6, 18, 32, 5.5, M5_clearance_radius];
+SK16 = ["SK16", 16, 27, 24, 48, 16, 44.0, 8, 25, 38, 5.5, M5_clearance_radius];
+
+sk_brackets = [SK8,  SK10, SK12, SK16];
+use <sk_bracket.scad>
+

vitamins/spool.scad

@@ -20,6 +20,7 @@
 //! Filament spool models
 
 include <../core.scad>
+include <../utils/tube.scad>
 
 function spool_diameter(type)      = type[1]; //! Outside diameter
 function spool_width(type)         = type[2]; //! Internal width
@@ -32,7 +33,7 @@ function spool_hub_taper(type)     = type[8]; //! Diameter at which it tapers do
 function spool_height(type)        = spool_width(type) + 2 * spool_hub_thickness(type); //! Outside width
 function spool_pitch(type)         = spool_width(type) + spool_rim_thickness(type); //! Spacing of the rims
 
-module spool(type) { //! Draw specified spool
+module spool(type, filament_depth = 0, filament_colour = "white", filament_d = 3) { //! Draw specified spool with optional filament
     vitamin(str("spool(", type[0], "): Filament spool ", spool_diameter(type), " x ", spool_width(type)));
 
     h = spool_height(type);
@@ -57,4 +58,25 @@ module spool(type) { //! Draw specified spool
             [r3, h - spool_hub_thickness(type) + spool_rim_thickness(type)],
             [r2, h],
         ]);
+
+    if(filament_depth) {
+        w = spool_width(type);
+        r = r5 + filament_depth;
+        color(filament_colour)
+            if(filament_d) {
+                n = round(w / filament_d) + 1;
+                fd = w / n;
+                rotate_extrude($fn = 180) {
+                    for(i = [0 : n -1])
+                        translate([r - fd / 2, i * fd - w / 2 + fd / 2])
+                            circle(d = fd, $fn = 32);
+
+                    translate([r5, -w / 2])
+                        square([filament_depth - fd / 2, w]);
+                }
+            }
+
+            else
+                tube(r, r5, w, $fn = 180);
+    }
 }