challenge-bot.com Git - challenge-bot/blob - motor-mount-drill-jig.scad

   1 // challenge-bot
   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 mm_per_inch = 25.4;
   8
   9 material_width = (1/8) * mm_per_inch;
  10
  11 board_length = 1.75 * mm_per_inch;
  12 board_width = 1.5 * mm_per_inch;
  13 board_depth = (3/16) * mm_per_inch;
  14 tab_length = 3 * mm_per_inch;
  15 tab_width = (1/4) * mm_per_inch;
  16
  17 union(){
  18   rotate(a = 90, v = [1, 0, 0]) {
  19     cube([board_length + material_width,
  20           1.75 * mm_per_inch + material_width,
  21           material_width ]);}
  22
  23   translate(v = [0, -material_width, 0]){
  24     rotate(a = -90, v = [0, 1, 0]) {
  25       cube( [1.75 * mm_per_inch + material_width,
  26              1.5 * mm_per_inch + 2 * material_width,
  27              material_width ]);}}
  28
  29   translate(v = [(1.75*mm_per_inch + material_width)/2 + tab_width,
  30                  -tab_length, 0]){
  31     rotate(a = 90, v = [0 ,0 ,1 ]){
  32       cube([3*mm_per_inch, 0.5*mm_per_inch , material_width]);}}
  33
  34   translate(v = [-tab_length,
  35                  (1.5*mm_per_inch + material_width)/2 - tab_width,
  36                  0]){
  37     cube([3*mm_per_inch, 0.5*mm_per_inch , material_width]);}
  38
  39   translate(v = [(1.75*mm_per_inch + material_width)/2 + tab_width,
  40                  (1.5*mm_per_inch),
  41                  0]){
  42     rotate(a = 90, v = [0, 0, 1]){
  43       cube([3*mm_per_inch, 0.5*mm_per_inch , material_width]);}}
  44
  45   translate(v = [(1.75*mm_per_inch),
  46                  (1.5*mm_per_inch+material_width)/2 - tab_width,
  47                  0]){
  48     cube([3*mm_per_inch, 0.5*mm_per_inch , material_width]);}}
  49
  50 _4_40 = 0.1285*mm_per_inch/2; // size of hole for 4x40
  51 _6_32 = 0.1495*mm_per_inch/2; // size of hole for 6x32
  52
  53 module collar_hole(){
  54   cylinder(h = board_depth, r = 2*_6_32, $fn=20);}
  55
  56 module nubbin_hole(){
  57   cylinder(h = board_depth, r = _6_32, $fn=20);}
  58
  59 module mounting_screw_hole(){
  60   cylinder(h = board_depth, r = _6_32, $fn=20);}
  61
  62 module bracket_screw_hole(){
  63   cylinder(h = board_depth, r = _6_32, $fn=20);}
  64
  65 module wheel_motor_holes(scale){
  66   translate([ 51-26.78,38-10.8, 0] * scale) {
  67     collar_hole();}
  68   translate([ 51-26.78,38-22.23, 0] * scale){
  69     nubbin_hole();}
  70   translate([51-18.05-17.45,38-30.81,  0] * scale){
  71     mounting_screw_hole();}
  72   translate([51-18.05,38-30.81, 0] * scale){
  73     mounting_screw_hole();}
  74   translate([7.5,8.5, 0] * scale){
  75     bracket_screw_hole();}
  76   translate([7.5,21+8.5,   0] * scale){
  77     bracket_screw_hole();}}
  78
  79 module wheel_mount(scale){
  80   difference(){
  81     cube(scale * [board_length + material_width,
  82                   board_width + material_width,
  83                   material_width]);
  84     wheel_motor_holes(scale);}}
  85
  86 wheel_mount(1);
  87
  88 translate(v = [0, 0, board_length]) jig_lid();
  89
  90 module jig_lid() {
  91   union() {
  92     wheel_mount(1);
  93     translate(v = [0, -2.1 * material_width, material_width]){
  94       cube([board_length + material_width,
  95             3.1 * material_width,
  96             material_width]);}
  97     translate(v = [0, -2.1 * material_width, 0]){
  98       cube([board_length + material_width, material_width, material_width]);}
  99     translate(v = [-2.1 * material_width, 0, material_width]){
 100       cube([3.1 * material_width,
 101             board_width + material_width,
 102             material_width]);}
 103     translate(v = [-2.1 * material_width, 0, 0]){
 104       cube([material_width, board_width+material_width, material_width]);}}}