| 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 | // use this drill jig for putting holes in a motor mount for screws |
| 8 | // and motor shaft. the four tabs at the bottom are for clamping |
| 9 | // the jig down. |
| 10 | |
| 11 | mm_per_inch = 25.4; |
| 12 | |
| 13 | material_width = (1 / 8) * mm_per_inch; |
| 14 | |
| 15 | board_length = 1.75 * mm_per_inch; |
| 16 | board_width = 1.5 * mm_per_inch; |
| 17 | board_depth = (3 / 16) * mm_per_inch; |
| 18 | tab_length = 3 * mm_per_inch; |
| 19 | tab_width = (1 / 4) * mm_per_inch; |
| 20 | |
| 21 | union(){ |
| 22 | rotate(a = 90, v = [1, 0, 0]) { |
| 23 | cube([board_length + material_width, |
| 24 | 1.75 * mm_per_inch + material_width, |
| 25 | material_width]);} |
| 26 | |
| 27 | translate(v = [0, -material_width, 0]){ |
| 28 | rotate(a = -90, v = [0, 1, 0]) { |
| 29 | cube( [1.75 * mm_per_inch + material_width, |
| 30 | 1.5 * mm_per_inch + 2 * material_width, |
| 31 | material_width]);}} |
| 32 | |
| 33 | translate(v = [(1.75 * mm_per_inch + material_width) / 2 + tab_width, |
| 34 | -tab_length, |
| 35 | 0]){ |
| 36 | rotate(a = 90, v = [0 ,0 ,1 ]){ |
| 37 | cube([3 * mm_per_inch, 0.5 * mm_per_inch , material_width]);}} |
| 38 | |
| 39 | translate(v = [-tab_length, |
| 40 | (1.5 * mm_per_inch + material_width) / 2 - tab_width, |
| 41 | 0]){ |
| 42 | cube([3 * mm_per_inch, 0.5 * mm_per_inch , material_width]);} |
| 43 | |
| 44 | translate(v = [(1.75 * mm_per_inch + material_width) / 2 + tab_width, |
| 45 | (1.5 * mm_per_inch), |
| 46 | 0]){ |
| 47 | rotate(a = 90, v = [0, 0, 1]){ |
| 48 | cube([3 * mm_per_inch, 0.5 * mm_per_inch , material_width]);}} |
| 49 | |
| 50 | translate(v = [(1.75 * mm_per_inch), |
| 51 | (1.5 * mm_per_inch + material_width) / 2 - tab_width, |
| 52 | 0]){ |
| 53 | cube([3 * mm_per_inch, 0.5 * mm_per_inch , material_width]);}} |
| 54 | |
| 55 | _4_40 = 0.1285 * mm_per_inch / 2; // size of hole for 4x40 |
| 56 | _6_32 = 0.1495 * mm_per_inch / 2; // size of hole for 6x32 |
| 57 | |
| 58 | module collar_hole(){ |
| 59 | cylinder(h = board_depth, r = 2 * _6_32, $fn = 20);} |
| 60 | |
| 61 | module nubbin_hole(){ |
| 62 | cylinder(h = board_depth, r = _6_32, $fn = 20);} |
| 63 | |
| 64 | module mounting_screw_hole(){ |
| 65 | cylinder(h = board_depth, r = _6_32, $fn = 20);} |
| 66 | |
| 67 | module bracket_screw_hole(){ |
| 68 | cylinder(h = board_depth, r = _6_32, $fn = 20);} |
| 69 | |
| 70 | module wheel_motor_holes(scale){ |
| 71 | translate([51 - 26.78, 38 - 10.8, 0] * scale) { |
| 72 | collar_hole();} |
| 73 | translate([51 - 26.78, 38 - 22.23, 0] * scale){ |
| 74 | nubbin_hole();} |
| 75 | translate([51 - 18.05 - 17.45, 38 - 30.81, 0] * scale){ |
| 76 | mounting_screw_hole();} |
| 77 | translate([51 - 18.05, 38 - 30.81, 0] * scale){ |
| 78 | mounting_screw_hole();} |
| 79 | translate([7.5, 8.5, 0] * scale){ |
| 80 | bracket_screw_hole();} |
| 81 | translate([7.5, 21 + 8.5, 0] * scale){ |
| 82 | bracket_screw_hole();}} |
| 83 | |
| 84 | module wheel_mount(scale){ |
| 85 | difference(){ |
| 86 | cube(scale * [board_length + material_width, |
| 87 | board_width + material_width, |
| 88 | material_width]); |
| 89 | wheel_motor_holes(scale);}} |
| 90 | |
| 91 | wheel_mount(1); |
| 92 | |
| 93 | translate(v = [0, 0, board_length]) jig_lid(); |
| 94 | |
| 95 | module jig_lid() { |
| 96 | union() { |
| 97 | wheel_mount(1); |
| 98 | translate(v = [0, -2.1 * material_width, material_width]){ |
| 99 | cube([board_length + material_width, |
| 100 | 3.1 * material_width, |
| 101 | material_width]);} |
| 102 | translate(v = [0, -2.1 * material_width, 0]){ |
| 103 | cube([board_length + material_width, material_width, material_width]);} |
| 104 | translate(v = [-2.1 * material_width, 0, material_width]){ |
| 105 | cube([3.1 * material_width, |
| 106 | board_width + material_width, |
| 107 | material_width]);} |
| 108 | translate(v = [-2.1 * material_width, 0, 0]){ |
| 109 | cube([material_width, board_width+material_width, material_width]);}}} |