--- /dev/null
+// 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 = 60;
+
+// from schematic http://goo.gl/96RKol
+collar_radius = 9.2 / 2;
+nubbin_radius = 4.48 / 2;
+screw_radius = 2.9 / 2 + 0.1; // a little bigger so screws fit through
+
+motor_height = 22.23;
+
+// http://freespace.virgin.net/matt.waite/resource/handy/screwsize.htm
+_6_radius = 3.5 / 2;
+
+// measurements we made up:
+mount_total_x = 38;
+mount_total_y = mount_total_x;
+mount_total_z = 3.175; // 3/16 in mm
+
+module motor_holes(){
+ collar_x_offset = 10.8;
+ nubbin_x_offset = 22.23;
+ // actual motor screw holes are 0.2 further than spec says
+ screw_x_offset = 30.81 + 0.2;
+ screw_y_offset = 17.44 / 2;
+
+ translate([collar_x_offset, 0, 0]){
+ cylinder(r = collar_radius, h = mount_total_z + 0.1);}
+ translate([nubbin_x_offset, 0, 0]){
+ cylinder(r = nubbin_radius, h = mount_total_z + 0.1);}
+ translate([screw_x_offset, 0, 0]){
+ translate([0, screw_y_offset, 0]){
+ cylinder(r = screw_radius, h = mount_total_z + 0.1);}
+ translate([0, -screw_y_offset, 0]){
+ cylinder(r = screw_radius, h = mount_total_z + 0.1);}}}
+
+module bracket_holes(){
+ translate([6 + _6_radius, 0, 0])
+ cylinder(r = _6_radius, h = mount_total_z + 0.1);
+ translate([mount_total_x - 6 - _6_radius, 0, 0])
+ cylinder(r = _6_radius, h = mount_total_z + 0.1);}
+
+module motor_mount(){
+ difference(){
+ cube([mount_total_x, mount_total_y, mount_total_z]);
+ translate([0, 6.2, -0.05]){
+ bracket_holes();}
+ translate([0, mount_total_y - motor_height / 2 - 3, -0.05]){
+ motor_holes();}}}
+
+motor_mount();