rc-control-horn.scad

   1 eps = 0.01;
   2 infty = 100;
   3
   4 wall = 1;
   5
   6 slot_off = 4;
   7
   8 slot_l = 10;
   9 slot_depth = 2.5;
  10 side_w = 4;
  11
  12 base_l = 4 + slot_l;
  13
  14 hole_h = 10;
  15 hole_d = 1.5;
  16 hole_step = 1.5*hole_d;
  17 n_holes = 3;
  18
  19 hole_side = 1.5*wall;
  20
  21 module horn() {
  22         difference() {
  23         hull() {
  24                 // base
  25                 translate([slot_off, 0, 0])
  26                         cube([base_l, wall, wall]);
  27
  28                         for (y = [1:n_holes]) {
  29                                 translate([0, hole_h -(y-1)*hole_step, 0])
  30                                         cylinder(r = hole_d/2 + hole_side,
  31                                                 h = wall, $fn = 6);
  32                         }
  33                 }
  34
  35                 for (y = [1:n_holes]) {
  36                         translate([0, hole_h -(y-1)*hole_step, -eps])
  37                                 cylinder(r = hole_d/2, h = wall + 2*eps, $fn = 6);
  38                 }
  39         }
  40
  41
  42         // side support
  43         translate([slot_off, 0, 0])
  44                 cube([base_l, wall, side_w]);
  45
  46         // slot
  47         hull() {
  48                 translate([slot_off + (base_l - slot_l)/2, -slot_depth/2, 0])
  49                         cube([slot_l, slot_depth/2, wall]);
  50                 translate([slot_off + (base_l - slot_l)/2 + wall, -slot_depth, 0])
  51                         cube([slot_l - 2*wall, slot_depth/2+eps, wall]);
  52         }
  53 }
  54
  55 for (x = [-1, 1]) scale([x, 1, 1])
  56         translate([hole_side + hole_d/2 + 2*wall, 0, 0]) horn();