| 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 | use <qr.scad> |
| 13 | |
| 14 | qr_size = 54; |
| 15 | qr_height = 2; |
| 16 | |
| 17 | wall_width = 3; |
| 18 | |
| 19 | wheel_width = 6; |
| 20 | wheel_radius = sqrt(2 * pow(qr_size / 2, 2)) + wall_width / 2; |
| 21 | |
| 22 | motor_shaft_radius = 3.7; |
| 23 | motor_shaft_flat_width = 4.8; |
| 24 | |
| 25 | module mounting_screw_flat(){ |
| 26 | square(2, center = true);} |
| 27 | |
| 28 | module motor_shaft_flat(radius, flat_width){ |
| 29 | intersection(){ |
| 30 | circle(radius); |
| 31 | square([flat_width, radius * 2], center = true);}} |
| 32 | |
| 33 | module motor_shaft(radius, |
| 34 | flat_width, |
| 35 | shaft_length){ |
| 36 | linear_extrude(height = shaft_length){ |
| 37 | motor_shaft_flat(radius, flat_width);}} |
| 38 | |
| 39 | module rim(radius, wall_width, wheel_width){ |
| 40 | linear_extrude(height = wheel_width){ |
| 41 | difference(){ |
| 42 | circle(radius); |
| 43 | circle(radius - wall_width);}}} |
| 44 | |
| 45 | module motor_shaft_holder_flat(radius, flat_width, wall_width){ |
| 46 | difference(){ |
| 47 | motor_shaft_flat(radius + wall_width, |
| 48 | flat_width + wall_width); |
| 49 | motor_shaft_flat(radius, flat_width);}} |
| 50 | |
| 51 | module motor_shaft_holder(radius, flat_width, wall_width, height){ |
| 52 | linear_extrude(height = height){ |
| 53 | motor_shaft_holder_flat(radius, flat_width, wall_width);}} |
| 54 | |
| 55 | module wheel_black(radius, width, shaft_radius, shaft_flat_width, wall_width){ |
| 56 | color("black"){ |
| 57 | rim(radius, wall_width, width); |
| 58 | linear_extrude(height = qr_height){ |
| 59 | difference(){ |
| 60 | qr_black_flat(); |
| 61 | mounting_screw_flat();}} |
| 62 | translate([0, 0, qr_height]){ |
| 63 | motor_shaft_holder(shaft_radius, |
| 64 | shaft_flat_width, |
| 65 | wall_width, |
| 66 | width - qr_height);}}} |
| 67 | |
| 68 | module wheel_white(){ |
| 69 | color("white"){ |
| 70 | linear_extrude(height = qr_height){ |
| 71 | difference(){ |
| 72 | qr_white_flat(); |
| 73 | mounting_screw_flat();}}}} |
| 74 | |
| 75 | module wheel(radius, width, shaft_radius, shaft_flat_width, wall_width){ |
| 76 | wheel_black(radius, |
| 77 | width, |
| 78 | shaft_radius, |
| 79 | shaft_flat_width, |
| 80 | wall_width); |
| 81 | wheel_white();} |
| 82 | |
| 83 | wheel(wheel_radius, |
| 84 | wheel_width, |
| 85 | motor_shaft_radius, |
| 86 | motor_shaft_flat_width, |
| 87 | wall_width); |