| 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 $fn = 20 while developing, 100 when about to print |
| 8 | // 20 will make previews fast |
| 9 | // 100 will make printing smooth |
| 10 | $fn = 100; |
| 11 | |
| 12 | include <wheel-dimensions.scad> |
| 13 | use <qr.scad> |
| 14 | |
| 15 | module mounting_screw_flat() { |
| 16 | circle(0.9); } |
| 17 | |
| 18 | module motor_shaft_flat(radius, flat_width) { |
| 19 | intersection() { |
| 20 | circle(radius); |
| 21 | square([flat_width, radius * 2], center = true); } } |
| 22 | |
| 23 | module motor_shaft(radius, |
| 24 | flat_width, |
| 25 | shaft_length) { |
| 26 | linear_extrude(height = shaft_length) { |
| 27 | motor_shaft_flat(radius, flat_width); } } |
| 28 | |
| 29 | module rim(radius, wall_width, wheel_width) { |
| 30 | linear_extrude(height = wheel_width) { |
| 31 | difference() { |
| 32 | circle(radius); |
| 33 | circle(radius - wall_width); } } } |
| 34 | |
| 35 | module motor_shaft_holder_flat(radius, flat_width, wall_width) { |
| 36 | difference() { |
| 37 | motor_shaft_flat(radius + wall_width, |
| 38 | flat_width + wall_width); |
| 39 | motor_shaft_flat(radius, flat_width); } } |
| 40 | |
| 41 | module motor_shaft_holder(radius, flat_width, wall_width, height) { |
| 42 | linear_extrude(height = height) { |
| 43 | motor_shaft_holder_flat(radius, flat_width, wall_width); } } |
| 44 | |
| 45 | module tread(wheel_radius, tread_radius) { |
| 46 | rotate_extrude(convexity = 10) { |
| 47 | translate([wheel_radius, 0]) { |
| 48 | circle(tread_radius); } } } |
| 49 | |
| 50 | module wheel_black(radius, |
| 51 | width, |
| 52 | shaft_radius, |
| 53 | shaft_flat_width, |
| 54 | wall_width, |
| 55 | tread_radius) { |
| 56 | color("black") { |
| 57 | difference() { |
| 58 | rim(radius, wall_width, width); |
| 59 | translate([0, 0, width / 2]) { |
| 60 | tread(radius, tread_radius); } } |
| 61 | linear_extrude(height = qr_height) { |
| 62 | difference() { |
| 63 | qr_black_flat(); |
| 64 | mounting_screw_flat(); } } |
| 65 | translate([0, 0, qr_height]) { |
| 66 | motor_shaft_holder(shaft_radius, |
| 67 | shaft_flat_width, |
| 68 | wall_width, |
| 69 | width - qr_height); } } } |
| 70 | |
| 71 | module wheel_white() { |
| 72 | color("white") { |
| 73 | linear_extrude(height = qr_height) { |
| 74 | difference() { |
| 75 | qr_white_flat(); |
| 76 | mounting_screw_flat(); } } } } |
| 77 | |
| 78 | module wheel(radius, |
| 79 | width, |
| 80 | shaft_radius, |
| 81 | shaft_flat_width, |
| 82 | wall_width, |
| 83 | tread_radius) { |
| 84 | wheel_black(radius, |
| 85 | width, |
| 86 | shaft_radius, |
| 87 | shaft_flat_width, |
| 88 | wall_width, |
| 89 | tread_radius); |
| 90 | wheel_white(); } |
| 91 | |
| 92 | module wheel_solid(radius, |
| 93 | width, |
| 94 | shaft_radius, |
| 95 | shaft_flat_width, |
| 96 | wall_width, |
| 97 | tread_radius) { |
| 98 | difference() { |
| 99 | rim(radius, wall_width * 2, width); |
| 100 | translate([0, 0, width / 2]) { |
| 101 | tread(radius, tread_radius); } } |
| 102 | linear_extrude(height = qr_height) { |
| 103 | difference() { |
| 104 | square(qr_size, center = true); |
| 105 | mounting_screw_flat(); } } |
| 106 | translate([0, 0, qr_height]) { |
| 107 | motor_shaft_holder(shaft_radius, |
| 108 | shaft_flat_width, |
| 109 | wall_width, |
| 110 | width - qr_height); } } |
| 111 | |
| 112 | /* |
| 113 | wheel(wheel_radius, |
| 114 | wheel_width, |
| 115 | motor_shaft_radius, |
| 116 | motor_shaft_flat_width, |
| 117 | wall_width, |
| 118 | tread_radius); |
| 119 | */ |
| 120 | |
| 121 | wheel_solid(wheel_radius, |
| 122 | wheel_width, |
| 123 | motor_shaft_radius, |
| 124 | motor_shaft_flat_width, |
| 125 | wall_width, |
| 126 | tread_radius); |