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Wire_hole_radius() now rounded up to half mm diameters to match metric drills.

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mouse_grommet STL name is now based on the diameter instead of the radius.
Added mouse_grommet_length(r) and documented mouse_grommet_offset(r).
This commit is contained in:
Chris Palmer
2022-01-23 09:14:09 +00:00
parent 1928ec6fb1
commit d4e8dd8311
4 changed files with 23 additions and 17 deletions
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14
printed/cable_grommets.scad
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@@ -158,14 +158,14 @@ module mouse_grommet_hole(r, h = 50, z = undef, expand = wall + clearance) //! M
square([2 * R, eps]);
}
function mouse_grommet_offset(r) = r + wall;
function mouse_grommet_offset(r) = r + wall; //! Offset of the wire from the ground
function mouse_grommet_length(r) = 2 * r + 2 * wall + 2 * overlap; //! Length of grommet given r
module mouse_grommet(r, thickness) { //! Make the STL for a mouse grommet
width = 2 * (wall + clearance) + thickness;
length = 2 * r + 2 * wall + 2 * overlap;
stl(str("mouse_grommet_", r * 10, "_", thickness))
stl(str("mouse_grommet_", r * 20, "_", thickness))
rotate([90, 0, 0])
union() {
for(side = [-1, 1])
@@ -193,10 +193,10 @@ module mouse_grommet_assembly(r, thickness)
mouse_grommet(r, thickness);
module ribbon_grommet_20_3_stl() ribbon_grommet(20, 3);
module mouse_grommet_15_3_stl() mouse_grommet(1.5, 3);
module mouse_grommet_20_3_stl() mouse_grommet(2, 3);
module mouse_grommet_25_3_stl() mouse_grommet(2.5, 3);
module mouse_grommet_30_3_stl() mouse_grommet(3, 3);
module mouse_grommet_30_3_stl() mouse_grommet(1.5, 3);
module mouse_grommet_40_3_stl() mouse_grommet(2, 3);
module mouse_grommet_50_3_stl() mouse_grommet(2.5, 3);
module mouse_grommet_60_3_stl() mouse_grommet(3, 3);
module round_grommet_bottom_30_stl() round_grommet_bottom(3);
module round_grommet_bottom_40_stl() round_grommet_bottom(4);

12
readme.md
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@@ -4337,8 +4337,8 @@ Just a BOM entry at the moment and cable bundle size functions for holes, plus c
| `cable_radius(cable)` | Radius of a bundle of wires, see <http://mathworld.wolfram.com/CirclePacking.html>. |
| `cable_width(cable)` | Width in flat clip |
| `cable_wire_size(cable)` | Size of each wire in a bundle |
| `cable_wires(cable)` | Number of wires in a bindle |
| `wire_hole_radius(cable)` | Radius of a hole to accept a bundle of wires |
| `cable_wires(cable)` | Number of wires in a bundle |
| `wire_hole_radius(cable)` | Radius of a hole to accept a bundle of wires, rounded up to standard metric drill size |
### Modules
| Module | Description |
@@ -4632,6 +4632,12 @@ of conductive panels, an extra layer of insulation.
[tests/cable_grommets.scad](tests/cable_grommets.scad) Code for this example.
### Functions
| Function | Description |
|:--- |:--- |
| `mouse_grommet_length(r)` | Length of grommet given r |
| `mouse_grommet_offset(r)` | Offset of the wire from the ground |
### Modules
| Module | Description |
|:--- |:--- |
@@ -4648,7 +4654,7 @@ of conductive panels, an extra layer of insulation.
### Printed
| Qty | Filename |
| ---:|:--- |
| 1 | mouse_grommet_50_3.stl |
| 1 | mouse_grommet_100_3.stl |
| 1 | ribbon_grommet_20_3.stl |
| 1 | round_grommet_bottom_60.stl |
| 1 | round_grommet_top_60_3.stl |

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14
vitamins/wire.scad
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@@ -32,13 +32,13 @@ module ribbon_cable(ways, length) //! Add ribbon cable to the
//
// Cable sizes
//
function cable_wires(cable) = cable[0]; //! Number of wires in a bindle
function cable_wires(cable) = cable[0]; //! Number of wires in a bundle
function cable_wire_size(cable) = cable[1]; //! Size of each wire in a bundle
// numbers from http://mathworld.wolfram.com/CirclePacking.html
function cable_radius(cable) = [0, 1, 2, 2.15, 2.41, 2.7, 3, 3, 3.3][cable_wires(cable)] * cable_wire_size(cable) / 2; //! Radius of a bundle of wires, see <http://mathworld.wolfram.com/CirclePacking.html>.
function wire_hole_radius(cable) = ceil(2 * cable_radius(cable) +1) / 2; //! Radius of a hole to accept a bundle of wires
function wire_hole_radius(cable) = ceil(4 * cable_radius(cable) + 1) / 4; //! Radius of a hole to accept a bundle of wires, rounded up to standard metric drill size
function cable_bundle(cable) = //! Arrangement of a bundle in a flat cable clip
[[0,0], [1,1], [2,1], [2, 0.5 + sin(60)], [2,2], [3, 0.5 + sin(60)], [3,2]][cable_wires(cable)];
@@ -49,11 +49,11 @@ function cable_height(cable) = cable_bundle(cable)[1] * cable_wire_size(cable);
module mouse_hole(cable, h = 100, teardrop = false) { //! A mouse hole to allow a panel to go over a wire bundle.
r = wire_hole_radius(cable);
if(teardrop)
vertical_tearslot(r = r, l = 2 * r, h = h, plus = true);
else
rotate(90)
slot(r, 2 * r, h = h);
if(teardrop)
vertical_tearslot(r = r, l = 2 * r, h = h, plus = true);
else
rotate(90)
slot(r, 2 * r, h = h);
}
module cable_tie_holes(cable_r, h = 100) { //! Holes to thread a ziptie through a panel to make a cable tie.