NopSCADlib/printed/cable_grommets.scad

210 lines
7.2 KiB
OpenSCAD

//
// 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/>.
//
//
//! Printed cable grommets for passing cables through panels avoiding sharp edges and in the case
//! of conductive panels, an extra layer of insulation.
//
include <../utils/core/core.scad>
use <../vitamins/cable_strip.scad>
base = 1.25;
slot_height = round_to_layer(1.27) + layer_height;
wall = 1.6;
overlap = 1.5;
height = base + slot_height + wall + overlap;
rad = wall + overlap;
clearance = 0.1;
module ribbon_grommet_hole(ways, h = 50, expand = true) { //! Generate a hole for a ribbon grommet
length = ribbon_clamp_slot(ways) + 2 * wall;
rad = cnc_bit_r;
height = base + slot_height + wall;
extrude_if(h)
offset(expand ? clearance : 0)
hull() {
translate([-length / 2, 0])
square([length, base]);
for(end = [-1, 1])
translate([end * (length / 2 - rad), height - rad])
drill(rad, 0);
}
}
module ribbon_grommet(ways, thickness) { //! Generate the STL for a printed ribbon grommet
stl(str("ribbon_grommet_", ways, "_", thickness));
width = 2 * (wall + clearance) + thickness;
slot_length = ribbon_clamp_slot(ways);
length = slot_length + 2 * wall + 2 * overlap;
rotate([90, 0, 0])
union() {
for(side = [-1, 1])
translate_z(side * (width - wall) / 2)
linear_extrude(wall, center = true, convexity = 5)
difference() {
hull() {
translate([-length / 2, 0])
square([length, base]);
for(end = [-1, 1])
translate([end * (length / 2 - rad), height - rad])
semi_circle(rad);
}
translate([-slot_length / 2, base])
square([slot_length, slot_height]);
}
linear_extrude(width -1, center = true)
difference() {
ribbon_grommet_hole(ways, expand = false, h = 0);
translate([-slot_length / 2, base])
square([slot_length, slot_height]);
}
}
}
module round_grommet_top(diameter, thickness, od = undef) { //! Generate the STL for a round grommet top half
stl(str("round_grommet_top_", round(diameter * 10), "_", thickness));
chamfer = layer_height;
h = wall + thickness + wall;
r1 = diameter / 2;
r2 = od == undef ? corrected_radius(r1) + wall : od / 2;
r3 = r2 + overlap;
r0 = r1 + 1;
union() {
rotate_extrude()
polygon([
[r0, 0],
[r3 - chamfer, 0],
[r3, chamfer],
[r3, wall],
[r2, wall],
[r2, h - chamfer],
[r2 - chamfer, h],
[r0, h],
]);
render() difference() {
cylinder(r = r0 + eps, h = h);
poly_cylinder(r = r1, h = 100, center = true);
}
}
}
module round_grommet_bottom(diameter, od = undef) { //! Generate the STL for a round grommet bottom half
stl(str("round_grommet_bottom_", round(diameter * 10)));
chamfer = layer_height;
r1 = diameter / 2;
r2 = od == undef ? corrected_radius(r1) + wall : od / 2;
r3 = r2 + max(overlap, wall + chamfer);
rotate_extrude()
polygon([
[r2, chamfer],
[r2 + chamfer, 0],
[r3, 0],
[r3, wall - chamfer],
[r3 - chamfer, wall],
[r2, wall],
]);
}
module round_grommet_hole(diameter, h = 100) //! Make a hole for a round grommet
drill(corrected_radius(diameter / 2) + wall + clearance, h);
module round_grommet_assembly(diameter, thickness, od = undef) {
stl_colour(pp1_colour)
translate_z(wall)
vflip()
round_grommet_top(diameter, thickness, od);
stl_colour(pp2_colour)
translate_z(-thickness)
vflip()
round_grommet_bottom(diameter, od);
}
module mouse_grommet_hole(r, h = 50, z = undef, expand = wall + clearance) //! Make a hole for a mouse grommet
extrude_if(h)
hull(){
R = r + expand;
translate([0, z == undef ? R : z])
if(expand)
semi_circle(R);
else
semi_teardrop(r = R, h = 0);
translate([-R, 0])
square([2 * R, eps]);
}
function mouse_grommet_offset(r) = r + wall;
module mouse_grommet(r, thickness) { //! Make the STL for a mouse grommet
stl(str("mouse_grommet_", r * 10, "_", thickness));
width = 2 * (wall + clearance) + thickness;
length = 2 * r + 2 * wall + 2 * overlap;
rotate([90, 0, 0])
union() {
for(side = [-1, 1])
translate_z(side * (width - wall) / 2)
linear_extrude(wall, center = true)
difference() {
mouse_grommet_hole(r, z = r + wall, h = 0, expand = wall + overlap);
translate([0, wall])
mouse_grommet_hole(r, h = 0, expand = 0);
}
linear_extrude(width - 1, center = true)
difference() {
mouse_grommet_hole(r, h = 0, z = r + wall, expand = wall);
translate([0, wall])
mouse_grommet_hole(r, h = 0, expand = 0);
}
}
}
module mouse_grommet_assembly(r, thickness)
stl_colour(pp1_colour)
rotate([-90, 0, 0])
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 round_grommet_bottom_30_stl() round_grommet_bottom(3);
module round_grommet_bottom_40_stl() round_grommet_bottom(4);
module round_grommet_bottom_50_stl() round_grommet_bottom(5);
module round_grommet_bottom_60_stl() round_grommet_bottom(6);
module round_grommet_top_30_3_stl() round_grommet_top(3, 3);
module round_grommet_top_40_3_stl() round_grommet_top(4, 3);
module round_grommet_top_50_3_stl() round_grommet_top(5, 3);
module round_grommet_top_60_3_stl() round_grommet_top(6, 3);