tube-firewall.scad

   1 eps = 0.01;
   2 infty = 100;
   3
   4
   5 base_d = 26;
   6 screw_d1 = 19;
   7 screw_d2 = 16;
   8 screw_hole = 3.5;
   9 base_wall = 1.5;
  10
  11 motor_angle = 4;
  12
  13 tube_d = 8+0.2;
  14 tube_h = 20;
  15 tube_wall = 1;
  16
  17 module body() {
  18         // base
  19         cylinder(r = base_d/2, h = base_wall);
  20         // tube
  21         intersection() {
  22                 rotate([0, motor_angle, 0])
  23                         cylinder(r = tube_d/2 + tube_wall, h = tube_h);
  24                 translate([-infty/2, -infty/2, 0])
  25                         cube(infty);
  26         }
  27         // tube supports
  28         for (angle = [45, 135, 225, 315])
  29         rotate([0, 0, angle]) hull() {
  30                 translate([-eps/2, -tube_d/2, -eps/2])
  31                         cube([eps, tube_d, eps]);
  32                 translate([base_d/2, -eps/2, -eps/2])
  33                         cube(eps);
  34                 translate([tube_d/2, -eps/2, 0.9*tube_h])
  35                         cube(eps);
  36         }
  37 }
  38
  39 module screw_hole() {
  40         translate([0, 0, -eps])
  41                 cylinder(r = screw_hole/2, h = base_wall + 2*eps, $fn = 6);
  42         translate([0, 0, base_wall/2])
  43                 cylinder(r1 = screw_hole/2,
  44                         r2 = screw_hole/2 + base_wall/2,
  45                         h = base_wall/2+eps, $fn = 6);
  46 }
  47
  48 difference() {
  49         body();
  50         // screw holes
  51         for (x = [-1, 1]) translate([x*screw_d1/2, 0, 0])
  52                 screw_hole();
  53         for (y = [-1, 1]) translate([0, y*screw_d2/2, 0])
  54                 screw_hole();
  55         // tube hole
  56         rotate([0, motor_angle, 0])
  57         translate([0, 0, -infty/2])
  58                 cylinder(r = tube_d/2, h = infty);
  59 }
  60
  61