// challenge-bot
// GNU AGPLv3 (or later at your option)
// project available at these locations:
// https://gitorious.org/ozzloy/challenge-bot
// https://github.com/waynegramlich/challenge-bot

$fn = 100;

module ball_screws(){
  between = 14.732;
  screw_radius = 2.286/2;
  screw_length = 20;
  translate([between/2, 0, 0]) cylinder(h = screw_length, r = screw_radius);
  translate([-between/2, 0, 0]) cylinder(h = screw_length, r = screw_radius);}

module fixture(){
  height = 2.9464;
  width = 20.32;
  between = 14.732;
  side_radius = (width - between)/2;
  translate([between/2, 0, 0]) cylinder(h = height, r = side_radius);
  translate([-between/2, 0, 0]) cylinder(h = height, r = side_radius);
  }

module caster_standoff(){
  height = 43;
  caster_radius = 14.732/2;
  difference(){
    union(){
      cylinder(h = height, r = caster_radius);
      fixture();}
    scale([1, 1, 1.1]) translate([0, 0, -.1]) ball_screws();}}

caster_standoff();