4 wall = 0.6; // minimum wall
5 d_x = 25; // inner diameter in the X axis
6 y_scale = 0.5; // scale y/x
7 height = 2.5; // height of the rim
17 module half(d_x, y_scale, height) {
19 scale([1, (d_x*y_scale+height)/(d_x+height), 1])
20 cylinder(r = d_x/2 + height/2, h = eps);
21 translate([0, 0, height/2])
22 scale([1, y_scale, 1])
23 cylinder(r = d_x/2, h = eps);
27 module pulley(d_x, y_scale, height, center_hole_d) {
30 half(d_x, y_scale, height);
31 translate([0, 0, height]) scale([1, 1, -1])
32 half(d_x, y_scale, height);
35 translate([-lever_h, 0, 0])
36 cube([lever_h, eps, thin_wall]);
37 translate([-foam_h, -lever_l, 0])
38 cube([foam_h, eps, thin_wall]);
41 translate([0, 0, -eps])
42 cylinder(r = center_hole_d/2, h = height + 2*eps);
43 translate([-slot_w/2, d_x*y_scale/2, -eps])
44 cube([slot_w, height, height + 2*eps]);
45 translate([0, center_hole_d/2 + (d_x*y_scale/2-center_hole_d/2)/2, -eps])
46 cylinder(r = side_hole_d/2, h = height + 2*eps);
50 pulley(d_x = 30, y_scale = 0.4, height=3, center_hole_d = 2.5);
52 // translate([0, 20, 0])
53 // pulley(d_x = 35, y_scale = 0.4, height=2.5, center_hole_d = 8);