servo-tube-holder.scad

   1 eps = 0.01;
   2 infty = 200;
   3
   4 wall = 1.5;
   5 thin_wall = 0.6;
   6
   7 fuse_tube_d = 8.0 + 0.5;
   8 tube_xoff = wall - 0.5;
   9
  10 clip_w = 6;
  11
  12 slot_w = 3;
  13
  14 // 9g servo
  15 servo_l = 23.0;
  16 servo_w = 12.5;
  17
  18
  19 beam_w = fuse_tube_d/2 + wall - tube_xoff;
  20 beam_h = fuse_tube_d/2 + wall;
  21
  22 cable_w = 2.0;
  23 cable_l = 5.0;
  24
  25
  26 difference() {
  27         union() {
  28                 // servo frame
  29                 translate([-wall, -servo_l/2-clip_w, 0])
  30                         cube([servo_w + 2*wall, servo_l + 2*clip_w, thin_wall]);
  31                 // servo frame supports
  32                 for (y = [-1, 1])
  33                 scale([1, y, 1])
  34                 translate([0, servo_l/2 + clip_w - wall, 0])
  35                 hull() {
  36                         cube([servo_w/2 + cable_l/2, wall, thin_wall]);
  37                         cube([eps, wall, beam_h]);
  38                 }
  39                 // main beam
  40                 translate([-beam_w, -servo_l/2-clip_w, 0])
  41                         cube([beam_w, servo_l + 2*clip_w, fuse_tube_d/2+wall]);
  42                 // clips
  43                 for (y = [-1, 1])
  44                 scale([1, y, 1])
  45                 translate([0, servo_l/2, 0])
  46                 hull() {
  47                         // bottom cube
  48                         translate([-0.75*fuse_tube_d - 2*wall + tube_xoff, 0, 0])
  49                                 cube([0.75*fuse_tube_d + 2*wall, clip_w, fuse_tube_d/2 + wall + eps]);
  50                         // cylinder
  51                         translate([-fuse_tube_d/2 - wall + tube_xoff, 0, fuse_tube_d/2 + wall])
  52                         rotate([-90, 0, 0])
  53                                 cylinder(r = fuse_tube_d/2 + wall, h = clip_w);
  54                 }
  55
  56
  57         }
  58         // hole for servo
  59         translate([0, -servo_l/2, -eps])
  60                 cube([servo_w, servo_l, wall + 2*eps]);
  61         // fuse tube
  62         translate([-fuse_tube_d/2-wall + tube_xoff, servo_l/2+clip_w+eps, fuse_tube_d/2+wall])
  63                         rotate([90, 0, 0])
  64                         cylinder(r = fuse_tube_d/2, h = servo_l +2*clip_w + 2*eps);
  65         // fuse tube slot
  66         translate([-fuse_tube_d/2-wall-slot_w/2 + tube_xoff, -servo_l/2-clip_w-eps, fuse_tube_d/2+wall])
  67                 cube([slot_w, servo_l + 2*clip_w + 2*eps, fuse_tube_d/2+wall+eps]);
  68         // cable hole
  69         for (y = [-1, 1]) scale ([1, y, 1])
  70                 translate([servo_w/2-cable_l/2, servo_l/2-eps, -eps])
  71                         cube([cable_l, cable_w + eps, wall + 2*eps]);
  72 }
  73