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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 | $fn = 60; |
8 | |
9 | // from schematic http://goo.gl/96RKol |
10 | collar_radius = 9.2 / 2; |
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11 | // subtract a bit to make snap fit |
12 | nubbin_radius = (4.48 - 0.3) / 2; // make snap fit |
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13 | screw_radius = 2.9 / 2 + 0.1; // a little bigger so screws fit through |
14 | |
15 | motor_height = 22.23; |
16 | |
17 | // http://freespace.virgin.net/matt.waite/resource/handy/screwsize.htm |
18 | _6_radius = 3.5 / 2; |
19 | |
20 | // measurements we made up: |
21 | mount_total_x = 38; |
22 | mount_total_y = mount_total_x; |
23 | mount_total_z = 3.175; // 3/16 in mm |
24 | |
25 | module motor_holes(){ |
26 | collar_x_offset = 10.8; |
27 | nubbin_x_offset = 22.23; |
28 | // actual motor screw holes are 0.2 further than spec says |
29 | screw_x_offset = 30.81 + 0.2; |
30 | screw_y_offset = 17.44 / 2; |
31 | |
32 | translate([collar_x_offset, 0, 0]){ |
33 | cylinder(r = collar_radius, h = mount_total_z + 0.1);} |
34 | translate([nubbin_x_offset, 0, 0]){ |
35 | cylinder(r = nubbin_radius, h = mount_total_z + 0.1);} |
36 | translate([screw_x_offset, 0, 0]){ |
37 | translate([0, screw_y_offset, 0]){ |
38 | cylinder(r = screw_radius, h = mount_total_z + 0.1);} |
39 | translate([0, -screw_y_offset, 0]){ |
40 | cylinder(r = screw_radius, h = mount_total_z + 0.1);}}} |
41 | |
42 | module bracket_holes(){ |
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43 | translate([6.2, 0, 0]) |
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44 | cylinder(r = _6_radius, h = mount_total_z + 0.1); |
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45 | translate([mount_total_x - 6.2, 0, 0]) |
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46 | cylinder(r = _6_radius, h = mount_total_z + 0.1);} |
47 | |
48 | module motor_mount(){ |
49 | difference(){ |
50 | cube([mount_total_x, mount_total_y, mount_total_z]); |
51 | translate([0, 6.2, -0.05]){ |
52 | bracket_holes();} |
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53 | translate([1, mount_total_y - motor_height / 2 - 3, -0.05]){ |
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54 | motor_holes();}}} |
55 | |
56 | motor_mount(); |