1 include <configuration.scad>
3 module bolt_track(width, length, height) {
5 hdiff = hwidth - height;
9 translate([hwidth, height, -length])
10 cylinder(h=length, r=hwidth, $fn=$fn);
12 if (height < hwidth) {
13 translate([0, -1, height - hwidth - 1])
14 cube([width, length + 2, hdiff + 1]);
17 cube([width, length, height]);
21 function bracket_width(screw_area) = screw_area * 2 + threaded_rod_diameter;
22 function bracket_depth(lip_thickness, screw_area) = screw_area * 2 + lip_thickness;
23 function bracket_height(lip_length) = board_thickness + lip_length;
25 module beveled_box(size, bevel_size=4) {
26 function pythag(a, b) = sqrt(a * a + b * b);
27 function bevelradius(x, y, bevel) = pythag(x, y) - bevel * max(x, y) / min(x, y);
29 xzbevel = bevelradius(size[0], size[2], bevel_size);
30 yzbevel = bevelradius(size[1], size[2], bevel_size);
33 translate([size[0] / 2, size[1] / 2, size[2] / 2])
35 cube([xzbevel, size[1], xzbevel], center=true);
36 translate([size[0] / 2, size[1] / 2, size[2] / 2])
38 cube([size[0], yzbevel, yzbevel], center=true);
42 module yrodbracket(screw_area, lip_thickness, lip_length, bevel_size=2.0) {
43 inner_radius = threaded_rod_diameter / 2;
44 screw_center = screw_area / 2;
46 width = bracket_width(screw_area);
47 depth = bracket_depth(lip_thickness, screw_area);
48 height = bracket_height(lip_length);
51 translate([0, 0, -lip_length])
52 beveled_box([width, depth, height], bevel_size);
53 translate([screw_area, -1, -lip_length - lip_thickness])
54 bolt_track(threaded_rod_diameter, depth + 2, lip_length + lip_thickness + inner_radius);
56 translate([-1, lip_thickness, -lip_length - 1])
57 cube([width + 2, depth, lip_length + 1]);
60 for (x = [screw_center, width - screw_center]) {
61 for (y = [lip_thickness + screw_center, screw_area + lip_thickness + screw_center]) {
62 translate([x, y, board_thickness])
71 for (x = [0, bracket_width(12) + 5]) {
72 for (y = [0, bracket_height(3) + 5]) {
74 yrodbracket(12, 3, 3);