challenge-bot.com Git - challenge-bot/blob - schematic-3d-printable.scad

   1 // challenge-bot phase-2
   2 // GNU AGPLv3 (or later at your option)
   3 // project available at these locations:
   4 // https://gitorious.org/ozzloy/challenge-bot
   5 // https://github.com/waynegramlich/challenge-bot
   6
   7 // using
   8 // https://github.com/josefprusa/Prusa3/blob/master/box_frame/x-carriage.scad
   9 // as an example of how to code in scad
  10
  11 scale=10;
  12
  13 deck_width = 8;
  14 deck_length = 8;
  15 deck_depth = 3/16;
  16 deck_dimensions = [deck_width, deck_length, deck_depth];
  17
  18 module deck(scale){
  19   cube(deck_dimensions * scale, center = true);}
  20
  21 module collar_hole(scale){
  22   cylinder(h = 5/16 * scale, r = 0.362/2 * scale);}
  23
  24 module nubbin_hole(scale){
  25   cylinder(h = 5/16 * scale, r = 0.145/2 * scale);}
  26
  27 module mounting_screw_hole(scale){
  28   cylinder(h = 5/16 * scale, r = 0.114/2 * scale);}
  29
  30 module wheel_mount_reinforcement(scale){
  31   diagonal = sqrt(deck_depth * deck_depth + deck_depth * deck_depth);
  32   difference(){
  33     cube([deck_depth * 2, deck_depth * 2, deck_depth * 2] * scale);
  34     translate([-(diagonal - deck_depth) / 2, 0, 0] * scale)
  35       rotate([45, 0, 0])
  36         translate([0, -(diagonal * 1.1 - deck_depth) / 2, 0])
  37           cube([diagonal * 2, diagonal * 2 * 1.1, deck_depth * 2] * scale);}}
  38
  39 module wheel_mount(scale){
  40   difference(){
  41     cube([1.5, 2, 3/16] * scale);
  42     // motor shaft collar hole
  43     translate([0.5, 0.938, -1/16] * scale) {
  44       collar_hole(scale);}
  45     // nubbin hole
  46     translate([0.5 + 0.875 - 0.425, 0.938, -1/16] * scale){
  47       nubbin_hole(scale);}
  48     // mounting screw hole
  49     translate([0.5 + 1.213 - 0.425, 0.938 - 0.687/2, -1/16] * scale){
  50       mounting_screw_hole(scale);}
  51     translate([0.5 + 1.213 - 0.425, 0.938 + 0.687/2, -1/16] * scale){
  52       mounting_screw_hole(scale);}}}
  53
  54 translate([0, 0, (3/16)/2 * scale]){
  55   color("blue") deck(scale);
  56   rotate([90, 0, 0])
  57     translate([1.5, (deck_depth)/2, -4] * scale) wheel_mount(scale);
  58   rotate([90, 0, 0])
  59     translate([1.5, (deck_depth)/2, 4 - deck_depth] * scale)
  60       wheel_mount(scale);}
  61
  62 translate([1.5, deck_length/2 - deck_depth * 3, deck_depth] * scale){
  63   wheel_mount_reinforcement(scale);}
  64 translate([1.5 * 2 - deck_depth * 2,
  65            deck_length / 2 - deck_depth * 3,
  66            deck_depth]
  67           * scale){
  68   wheel_mount_reinforcement(scale);}
  69
  70 translate([1.5 + deck_depth * 2,
  71            3 * deck_depth - deck_length / 2,
  72            deck_depth]
  73           * scale){
  74   rotate([0, 0, 180]){
  75     wheel_mount_reinforcement(scale);}}
  76 translate([1.5 * 2, 3 * deck_depth - deck_length / 2, deck_depth] * scale){
  77   rotate([0, 0, 180]){
  78     wheel_mount_reinforcement(scale);}}