bike-comp-sensor-holder.scad

   1 eps = 0.01;
   2 infty = 100;
   3
   4 wall = 1;
   5 ziptie_w = 2.5 + 0.5;
   6 ziptie_h = 2.0 + 0.5;
   7
   8 fork_diam = 30;
   9 ring_h = 2*wall + ziptie_h;
  10
  11 base_d = 10;
  12 base_h = 4.5;
  13 hole_d = 3.5 + 0.5;
  14
  15 // cuircular base with screw hole
  16 difference() {
  17         hull() {
  18                 cylinder(r = base_d/2, h = base_h);
  19                 translate([-base_d/2-wall, -base_d/2, 0])
  20                         cube([wall, base_d, base_h]);
  21         }
  22         translate([0, 0, -infty/2])
  23                 cylinder(r = hole_d/2, h = infty);
  24         for (angle = [0:30:360]) rotate([0, 0, angle])
  25                 translate([0, 0, base_h])
  26                         rotate([0, 90, 0])
  27                         cylinder(r1 = 0, r2 = 1, h = base_d/2+eps, $fn=4);
  28 }
  29
  30 // ziptie holding part
  31 translate([-base_d/2-fork_diam/2 - ring_h, 0, 0])
  32 intersection() {
  33         translate([0, -base_d/2-eps, 0]) cube([infty, base_d+2*eps, 15]);
  34
  35         translate([0, -base_d/2, base_h])
  36         rotate([-90, 0, 0])
  37         difference() {
  38                 scale([1, 0.8, 1])
  39                 cylinder(r = fork_diam/2 + ring_h, h = base_d);
  40                 // fork itself
  41                 translate([0, 0, -eps])
  42                         cylinder(r = fork_diam/2, h = base_d + 2*eps);
  43         // two ziptie holes
  44         for (z = [wall, base_d - wall - ziptie_w])
  45         translate([0, 0, z])
  46                 difference() {
  47                         cylinder(r = fork_diam/2 + wall + ziptie_h,
  48                                 h = ziptie_w);
  49                         translate([0, 0, -eps])
  50                                 cylinder(r = fork_diam/2 + wall, h = ziptie_w+2*eps);
  51                 }
  52
  53 }}