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Cable clips can now handle up to 9 wires, have the nut and bolt flipped or use an insert.

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cable_radius() now handles cables with up to 20 wires.
cable_bundle() and cable_bundle_positions() now handle bundles up to 9 wires.
Added cable_merge().
This commit is contained in:
Chris Palmer
2024-02-18 23:51:30 +00:00
parent a3b27a736e
commit 0edf3a2f75
5 changed files with 156 additions and 80 deletions
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87
printed/cable_clip.scad
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@@ -18,29 +18,41 @@
//
//
//! Cable clips to order. Can be for one or two cables of different sizes.
//! Cable clips to order. Can be for one or two cables of different sizes. Can use an insert and a screw from below or a screw and nut either way up.
//
include <../core.scad>
use <../vitamins/wire.scad>
use <../utils/fillet.scad>
use <../vitamins/insert.scad>
wall = 2;
function cable_clip_width(screw) = max(wall + 2 * screw_clearance_radius(screw) + wall, washer_diameter(screw_washer(screw))); //! Width given the `screw`.
function cable_clip_height(cable) = cable_height(cable) + wall; //! Height given the `cable`.
function cable_clip_extent(screw, cable) = screw_clearance_radius(screw) + wall + cable_width(cable) + wall; //! How far it extends from the screw.
function cable_clip_offset(screw, cable) = screw_clearance_radius(screw) + wall + cable_width(cable) / 2; //! The offset of the cable from the screw
function cable_clip_insert(screw, insert = true) = //! Insert type for clip, given screw.
is_list(insert) ? insert : insert ? screw_insert(screw, true) : false;
module single_cable_clip(screw, cable, h = 0) {
screw_dia = 2 * screw_clearance_radius(screw);
height = cable_clip_width(screw);
depth = h ? h : cable_height(cable) + wall;
function cable_clip_width(screw, insert = false) = //! Width given the `screw` and possibly insert.
let(insert = cable_clip_insert(screw, insert))
insert ? 2 * (insert_hole_radius(insert) + wall) :
max(wall + 2 * screw_clearance_radius(screw) + wall, washer_diameter(screw_washer(screw)));
function cable_clip_height(cable, screw = false, insert = false) = //! Height given the `cable`.
let(insert = cable_clip_insert(screw, insert))
max(cable_height(cable) + wall, insert ? insert_hole_length(insert) + 1 : 0);
function cable_clip_extent(screw, cable, insert = false) = cable_clip_width(screw, insert) / 2 + cable_width(cable) + wall; //! How far it extends from the screw.
function cable_clip_offset(screw, cable, insert = false) = cable_clip_width(screw, insert) / 2 + cable_width(cable) / 2; //! The offset of the cable from the screw.
module single_cable_clip(screw, cable, h = 0, insert = false) {
insert = cable_clip_insert(screw, insert);
height = cable_clip_width(screw, insert);
depth = h ? h : cable_clip_height(cable, screw, insert);
w = cable_width(cable);
width = wall + w + wall + screw_dia + wall;
hole_x = wall + w + wall + screw_dia / 2;
width = wall + w + height;
hole_x = wall + w + height / 2;
rad = min(wall + cable_wire_size(cable) / 2, depth / 2);
r = extrusion_width - eps;
translate([-hole_x, 0]) difference() {
translate([-hole_x, 0])
difference() {
linear_extrude(height)
difference() {
hull() {
@@ -68,50 +80,67 @@ module single_cable_clip(screw, cable, h = 0) {
}
}
translate([hole_x, depth / 2, height / 2])
rotate([90,0,0])
teardrop_plus(h = depth + 1, r = screw_dia / 2, center = true);
translate([hole_x, depth, height / 2])
rotate([90, 0, 0])
if(insert)
insert_hole(insert, 10, horizontal = true);
else
teardrop_plus(h = 2 * depth + 1, r = screw_clearance_radius(screw), center = true);
}
}
module double_cable_clip(screw, cable1, cable2) {
h = max(cable_clip_height(cable1), cable_clip_height(cable2));
module double_cable_clip(screw, cable1, cable2, insert = false) {
h = max(cable_clip_height(cable1, screw, insert), cable_clip_height(cable2, screw, insert));
union() {
single_cable_clip(screw, cable1, h);
single_cable_clip(screw, cable1, h, insert);
mirror([1,0,0]) single_cable_clip(screw, cable2, h);
mirror([1,0,0]) single_cable_clip(screw, cable2, h, insert);
}
}
module cable_clip(screw, cable1, cable2 = 0) { //! Create the STL for a single cable or two cable clip
function clip_str(screw) = str("cable_clip_", screw_radius(screw) * 20);
module cable_clip(screw, cable1, cable2 = 0, insert = false) { //! Create the STL for a single cable or two cable clip
function clip_str(screw) = str("cable_clip_", screw_radius(screw) * 20, insert ? "I" : "");
function cable_str(cable) = str("_", cable_wires(cable), "_", round(cable_wire_size(cable) * 10));
if(cable2) {
stl(str(clip_str(screw), cable_str(cable1), cable_str(cable2)));
double_cable_clip(screw, cable1, cable2);
double_cable_clip(screw, cable1, cable2, insert);
}
else {
stl(str(clip_str(screw), cable_str(cable1)));
single_cable_clip(screw, cable1);
single_cable_clip(screw, cable1, h = 0, insert = insert);
}
}
module cable_clip_assembly(screw, thickness, cable1, cable2 = 0) { //! Cable clip with the fasteners
height = max(cable_clip_height(cable1), cable2 ? cable_clip_height(cable2) : 0);
module cable_clip_assembly(screw, thickness, cable1, cable2 = 0, flip = false, insert = false) { //! Cable clip with the fasteners
flip = flip || insert; // Screw must be below if using an insert
insert = cable_clip_insert(screw, insert);
height = max(cable_clip_height(cable1, screw, insert), cable2 ? cable_clip_height(cable2, screw, insert) : 0);
stl_colour(pp1_colour) render()
translate([0, cable_clip_width(screw) / 2]) rotate([90, 0, 0])
cable_clip(screw, cable1, cable2);
translate([0, cable_clip_width(screw, insert) / 2])
rotate([90, 0, 0])
cable_clip(screw, cable1, cable2, insert);
nut = screw_nut(screw);
screw_len = screw_length(screw, height + thickness, 2, nyloc = !insert, insert = insert);
translate_z(height)
screw_and_washer(screw, screw_length(screw, height + thickness, 2, nyloc = true));
if(flip)
if(insert)
insert(insert);
else
nut_and_washer(nut, true);
else
screw_and_washer(screw, screw_len);
translate_z(-thickness)
vflip()
nut_and_washer(screw_nut(screw), true);
if(flip)
screw_and_washer(screw, screw_len, insert);
else
nut_and_washer(nut, true);
}

31
readme.md
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@@ -4968,6 +4968,7 @@ Utilities for adding wires to the BOM and optionally drawing them and cable bund
| `cable_bundle_positions(cable)` | Positions of wires in a bundle to go through a cable strip |
| `cable_height(cable)` | Height in flat clip |
| `cable_is_ribbon(cable)` | Is a ribbon cable? |
| `cable_merge(cable1, cable2)` | Combine the wires of two cables |
| `cable_radius(cable)` | Radius of a bundle of wires, see <http://mathworld.wolfram.com/CirclePacking.html>. |
| `cable_tlen(cable)` | Twisted cable twist length |
| `cable_twisted_radius(cable)` | Approximate radius of a cable when twisted |
@@ -5271,7 +5272,7 @@ fixing_blocks along the sides.
---
<a name="cable_clip"></a>
## Cable_clip
Cable clips to order. Can be for one or two cables of different sizes.
Cable clips to order. Can be for one or two cables of different sizes. Can use an insert and a screw from below or a screw and nut either way up.
[printed/cable_clip.scad](printed/cable_clip.scad) Implementation.
@@ -5280,35 +5281,41 @@ Cable clips to order. Can be for one or two cables of different sizes.
### Functions
| Function | Description |
|:--- |:--- |
| `cable_clip_extent(screw, cable)` | How far it extends from the screw. |
| `cable_clip_height(cable)` | Height given the `cable`. |
| `cable_clip_offset(screw, cable)` | The offset of the cable from the screw |
| `cable_clip_width(screw)` | Width given the `screw`. |
| `cable_clip_extent(screw, cable, insert = false)` | How far it extends from the screw. |
| `cable_clip_height(cable, screw = false, insert = false)` | Height given the `cable`. |
| `cable_clip_insert(screw, insert = true)` | Insert type for clip, given screw. |
| `cable_clip_offset(screw, cable, insert = false)` | The offset of the cable from the screw. |
| `cable_clip_width(screw, insert = false)` | Width given the `screw` and possibly insert. |
### Modules
| Module | Description |
|:--- |:--- |
| `cable_clip(screw, cable1, cable2 = 0)` | Create the STL for a single cable or two cable clip |
| `cable_clip_assembly(screw, thickness, cable1, cable2 = 0)` | Cable clip with the fasteners |
| `cable_clip(screw, cable1, cable2 = 0, insert = false)` | Create the STL for a single cable or two cable clip |
| `cable_clip_assembly(screw, thickness, cable1, cable2 = 0, flip = false, insert = false)` | Cable clip with the fasteners |
![cable_clip](tests/png/cable_clip.png)
### Vitamins
| Qty | Module call | BOM entry |
| ---:|:--- |:---|
| 2 | `insert(CNCKM3)` | Heatfit insert M3 x 3mm |
| 5 | `nut(M3_nut, nyloc = true)` | Nut M3 x 2.4mm nyloc |
| 2 | `screw(M3_dome_screw, 12)` | Screw M3 dome x 12mm |
| 3 | `screw(M3_dome_screw, 16)` | Screw M3 dome x 16mm |
| 10 | `washer(M3_washer)` | Washer M3 x 7mm x 0.5mm |
| 2 | `screw(M3_dome_screw, 10)` | Screw M3 dome x 10mm |
| 1 | `screw(M3_dome_screw, 12)` | Screw M3 dome x 12mm |
| 4 | `screw(M3_dome_screw, 16)` | Screw M3 dome x 16mm |
| 12 | `washer(M3_washer)` | Washer M3 x 7mm x 0.5mm |
| 2 | `star_washer(M3_washer)` | Washer star M3 x 0.5mm |
### Printed
| Qty | Filename |
| ---:|:--- |
| 1 | cable_clip_30_10_13.stl |
| 1 | cable_clip_30I_10_13.stl |
| 1 | cable_clip_30I_5_14_6_14.stl |
| 1 | cable_clip_30_1_14_2_14.stl |
| 1 | cable_clip_30_1_60.stl |
| 1 | cable_clip_30_3_14_4_14.stl |
| 1 | cable_clip_30_5_14_6_14.stl |
| 1 | cable_clip_30_7_14_8_14.stl |
| 1 | cable_clip_30_9_14.stl |
<a href="#top">Top</a>

15
tests/cable_clip.scad
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@@ -25,20 +25,20 @@ use <../vitamins/wire.scad>
sheet_thickness = 3;
cables = [
for(i = [1 : 6]) [i, 1.4], [1, 6], 0, [10, inch(0.05), true], 0
[10, inch(0.05), true], 0, for(i = [1 : 9]) [i, 1.4], 0, [1, 6], 0,
];
screw = M3_dome_screw;
module cable_clips() {
for(i = [0 : ceil(len(cables) / 2) - 1])
translate([i * 25, 0]) {
for(i = [0 : ceil(len(cables) / 2) - 1]) {
cable1 = cables[2 * i];
cable2 = cables[2 * i + 1];
translate([i * 21 + (!cable2 ? cable_clip_offset(screw, cable1) / 2 : 0), 0]) {
insert = in([0, 3], i);
if($preview) {
cable_clip_assembly(screw, sheet_thickness, cable1, cable2);
cable_clip_assembly(screw, sheet_thickness, cable1, cable2, insert = insert, flip = i == 1);
for(j = [0 : 1])
let(cable = cables[2 * i + j])
@@ -46,13 +46,14 @@ module cable_clips() {
let(positions = cable_bundle_positions(cable))
for(i = [0 : len(positions) - 1])
let(p = positions[i])
translate([p.x + [-1, 1][j] * cable_clip_offset(screw, cable), 0, p.y])
translate([p.x + [-1, 1][j] * cable_clip_offset(screw, cable, insert = insert), 0, p.y])
rotate([90, 0, 0])
color([grey(20), "blue", "red", "orange", "yellow", "green", "brown", "purple", "grey", "white"][i])
cylinder(d = cable_wire_size(cable), h = 30, center = true);
}
else
cable_clip(screw, cable1, cable2);
cable_clip(screw, cable1, cable2, insert = insert);
}
}
}

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51
vitamins/wire.scad
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@@ -44,23 +44,62 @@ function cable_is_ribbon(cable) = len(cable) > 2 && cable[2]; //! Is a ribbon ca
function cable_wire_colours(cable) = assert(len(cable[3]) >= cable_wires(cable)) cable[3]; //! Individual wire colours
function cable_tlen(cable) = cable[4]; //! Twisted cable twist length
function cable(wires, size, colours, ribbon = false, tlen = 25) = [wires, size, ribbon, colours, tlen]; //! Cable constructor
function cable_merge(cable1, cable2) = //! Combine the wires of two cables
assert(cable_wire_size(cable1) == cable_wire_size(cable2))
assert(cable_is_ribbon(cable1) == cable_is_ribbon(cable2))
cable(cable_wires(cable1) + cable_wires(cable2),
cable_wire_size(cable1),
concat(cable_wire_colours(cable1), cable_wire_colours(cable1)),
cable_is_ribbon(cable1));
// numbers from http://mathworld.wolfram.com/CirclePacking.html
function cable_radius(cable) = [0, 1, 2, 2.15, 2.41, 2.7, 3, 3, 3.3][cable_wires(cable)] * cable_wire_size(cable) / 2; //! Radius of a bundle of wires, see <http://mathworld.wolfram.com/CirclePacking.html>.
// numbers from https://en.wikipedia.org/wiki/Circle_packing_in_a_circle
function cable_radius(cable) = [ //! Radius of a bundle of wires, see <http://mathworld.wolfram.com/CirclePacking.html>.
0, 1, 2,
2.154, // 3
2.414, // 4
2.701, // 5
3, // 6
3, // 7
3.304, // 8
3.613, // 9
3.813, // 10
3.923, // 11
4.029, // 12
4.236, // 13
4.328, // 14
4.521, // 15
4.615, // 16
4.792, // 17
4.863, // 18
4.863, // 19
5.122, // 20
][cable_wires(cable)] * cable_wire_size(cable) / 2;
function wire_hole_radius(cable) = ceil(4 * cable_radius(cable) + 1) / 4; //! Radius of a hole to accept a bundle of wires, rounded up to standard metric drill size
function cable_bundle(cable) = //! Dimensions of the bounding rectangle of a bundle of wires in a flat cable clip
(cable_is_ribbon(cable) ? [cable_wires(cable), 1] :
[[0,0], [1,1], [2,1], [2, 1 + sin(60)], [2,2], [3, 1 + sin(60)], [3,2]][cable_wires(cable)]) * cable_wire_size(cable);
[[0, 0], // 0
[1, 1], // 1
[2, 1], // 2
[2, 1 + sin(60)], // 3
[2, 2], // 4
[3, 1 + sin(60)], // 5
[3, 2], // 6
[4, 1 + sin(60)], // 7
[3, 2 + sin(60)], // 8
[3, 3]
][cable_wires(cable)]) * cable_wire_size(cable);
function cable_bundle_positions(cable) = let( //! Positions of wires in a bundle to go through a cable strip
wires = cable_wires(cable),
bottom = cable_is_ribbon(cable) ? wires : wires < 3 ? wires : ceil(wires / 2),
top = wires - bottom
bottom = cable_is_ribbon(cable) ? wires : wires < 3 ? wires : wires <= 7 ? ceil(wires / 2) : min(wires, 3),
middle = min(wires - bottom, 3),
top = wires - bottom - middle
)
[for(i = [0 : 1 : bottom - 1]) [i - (bottom - 1) / 2, 0.5],
for(i = [top - 1 : -1 : 0]) [i - (top - 1) / 2, top == bottom ? 1.5 : 0.5 + sin(60)]
for(i = [middle - 1 : -1 : 0]) [i - (middle - 1) / 2, middle == bottom ? 1.5 : 0.5 + sin(60)],
for(i = [0 : 1 : top - 1]) [i - [0.5, 0.5, 1][top - 1], top == middle ? 2.5 : 1.5 + sin(60)]
] * cable_wire_size(cable);
function cable_width(cable) = cable_bundle(cable).x; //! Width in flat clip