Fixed leadscrew when center = false.

This means 5mm, 6mm etc comes before 10mm in BOM.

lib.scad

@@ -63,6 +63,7 @@ include <vitamins/mains_sockets.scad>
 include <vitamins/ldrs.scad>
 include <vitamins/geared_steppers.scad>
 include <vitamins/extrusions.scad>
+include <vitamins/sk_brackets.scad>
 
 use <vitamins/jack.scad>
 use <vitamins/meter.scad>

readme.md

@@ -33,20 +33,20 @@ See [usage](docs/usage.md) for requirements, installation instructions and a usa
 <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 = "#Hot_ends">Hot_ends</a> </td><td> <a href = "#Sk_brackets">Sk_brackets</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 = "#Spades">Spades</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 = "#Spools">Spools</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 = "#Springs">Springs</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 = "#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>
 
@@ -213,7 +213,7 @@ 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 +823,7 @@ 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)
@@ -2027,10 +2027,10 @@ 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 |
 
@@ -2096,10 +2096,10 @@ 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>
@@ -2384,14 +2384,14 @@ 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 |
@@ -2497,6 +2497,54 @@ 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, screw_length = 16, screw_type = M5_cap_screw, nut_type = undef)``` | Assembly with fasteners in place |
+
+![sk_brackets](tests/png/sk_brackets.png)
+
+### Vitamins
+| Qty | Module call | BOM entry |
+| ---:|:--- |:---|
+|   4 | ```sliding_t_nut(M5_sliding_t_nut)``` |  Nut M5 sliding T |
+|   4 | ```nut(M5_nut)``` |  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 |
+|   8 | ```screw(M5_cap_screw, 16)``` |  Screw M5 cap x 16mm |
+|  12 | ```washer(M5_washer)``` |  Washer  M5 x 10mm x 1mm |
+
+
 <a href="#top">Top</a>
 
 ---
@@ -2713,7 +2761,7 @@ 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 |
@@ -3507,7 +3555,7 @@ 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 |
@@ -3727,7 +3775,7 @@ 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 |
@@ -3871,7 +3919,7 @@ 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 |
@@ -4286,7 +4334,7 @@ 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 |
 
@@ -4758,7 +4806,7 @@ 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 |

tests/sk_brackets.scad

@@ -0,0 +1,32 @@
+//
+// 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() {
+    nuts = [undef, M5_nut, M5_sliding_t_nut, M5_sliding_t_nut];
+    layout([for(s = sk_brackets) 1.5 * sk_size(s)[1]])
+        sk_bracket_assembly(sk_brackets[$i], nut_type = nuts[$i]);
+}
+
+if($preview)
+    sk_brackets();
+

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/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/sk_bracket.scad

@@ -0,0 +1,116 @@
+//
+// 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 = type[1];
+    h = type[2];
+    E = type[3];
+    W = type[4];
+    L = type[5];
+    F = type[6];
+    G = type[7];
+    P = type[8];
+    B = type[9];
+    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_assembly(type, screw_length = 16, screw_type = M5_cap_screw, nut_type = undef) { //! Assembly with fasteners in place
+    sk_bracket(type);
+
+    nut_type = is_undef(nut_type) ? screw_nut(screw_type) : nut_type;
+
+    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]) {
+                screw_and_washer(screw_type, screw_length);
+                translate_z(-screw_length + 2 * washer_thickness(screw_washer(screw_type)))
+                    if(nut_type == M5_sliding_t_nut)
+                        translate_z(nut_thickness(nut_type))
+                            vflip()
+                                sliding_t_nut(nut_type);
+                    else
+                        nut(nut_type)
+                            washer(nut_washer(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>
+