paul@0 | 1 | module cartridge() |
paul@0 | 2 | { |
paul@0 | 3 | $fn = 50; |
paul@0 | 4 | |
paul@0 | 5 | module fillet(r, h) { |
paul@0 | 6 | translate([0, 0, -h/2]) |
paul@0 | 7 | difference() { |
paul@0 | 8 | cube([r, r, h]); |
paul@0 | 9 | cylinder(r = r, h = h); |
paul@0 | 10 | } |
paul@0 | 11 | } |
paul@0 | 12 | |
paul@0 | 13 | /* Cartridge dimensions. */ |
paul@0 | 14 | |
paul@0 | 15 | width = 89.0; |
paul@0 | 16 | height = 68.5; |
paul@0 | 17 | depth = 16.5; |
paul@0 | 18 | |
paul@0 | 19 | /* Side thicknesses. */ |
paul@0 | 20 | |
paul@0 | 21 | front = 2; |
paul@0 | 22 | back = 3.5; |
paul@0 | 23 | top = 3; |
paul@0 | 24 | left = 2; |
paul@0 | 25 | right = 2; |
paul@0 | 26 | |
paul@0 | 27 | /* Rounding/fillet offset, radius and additional length. |
paul@0 | 28 | The radius needs to be slightly larger than the offset |
paul@0 | 29 | in order to avoid geometry problems. */ |
paul@0 | 30 | |
paul@0 | 31 | ro = 1; |
paul@0 | 32 | rr = 1.01; |
paul@0 | 33 | extra = 0; |
paul@0 | 34 | |
paul@0 | 35 | difference() { |
paul@0 | 36 | union() { |
paul@0 | 37 | translate([0, -depth / 2 + front / 2, 0]) |
paul@0 | 38 | cube([width, front, height], center = true); |
paul@0 | 39 | translate([0, depth / 2 - back / 2, 0]) |
paul@0 | 40 | cube([width, back, height], center = true); |
paul@0 | 41 | translate([-width / 2 + left / 2, 0, 0]) |
paul@0 | 42 | cube([left, depth, height], center = true); |
paul@0 | 43 | translate([width / 2 - right / 2, 0, 0]) |
paul@0 | 44 | cube([right, depth, height], center = true); |
paul@0 | 45 | translate([0, 0, height / 2 - top / 2]) |
paul@0 | 46 | cube([width, depth, top], center = true); |
paul@0 | 47 | } |
paul@0 | 48 | |
paul@0 | 49 | union() { |
paul@0 | 50 | |
paul@0 | 51 | /* Top left and right rounding. */ |
paul@0 | 52 | |
paul@0 | 53 | translate([-width / 2 + ro, 0, height / 2 - ro]) |
paul@0 | 54 | rotate([0, 0, 180]) |
paul@0 | 55 | rotate([90, 0, 0]) |
paul@0 | 56 | fillet(rr, depth + extra); |
paul@0 | 57 | translate([width / 2 - ro, 0, height / 2 - ro]) |
paul@0 | 58 | rotate([90, 0, 0]) |
paul@0 | 59 | fillet(rr, depth + extra); |
paul@0 | 60 | |
paul@0 | 61 | /* Top back and front rounding. */ |
paul@0 | 62 | |
paul@0 | 63 | translate([0, depth / 2 - ro, height / 2 - ro]) |
paul@0 | 64 | rotate([0, -90, 0]) |
paul@0 | 65 | fillet(rr, width + extra); |
paul@0 | 66 | translate([0, -depth / 2 + ro, height / 2 - ro]) |
paul@0 | 67 | rotate([0, 0, 180]) |
paul@0 | 68 | rotate([0, -90, 0]) |
paul@0 | 69 | fillet(rr, width + extra); |
paul@0 | 70 | |
paul@0 | 71 | /* Edge rounding. */ |
paul@0 | 72 | |
paul@0 | 73 | translate([width / 2 - ro, depth / 2 - ro, 0]) |
paul@0 | 74 | fillet(rr, height + extra); |
paul@0 | 75 | translate([-width / 2 + ro, depth / 2 - ro, 0]) |
paul@0 | 76 | rotate([0, 0, 90]) |
paul@0 | 77 | fillet(rr, height + extra); |
paul@0 | 78 | translate([-width / 2 + ro, -depth / 2 + ro, 0]) |
paul@0 | 79 | rotate([0, 0, 180]) |
paul@0 | 80 | fillet(rr, height + extra); |
paul@0 | 81 | translate([width / 2 - ro, -depth / 2 + ro, 0]) |
paul@0 | 82 | rotate([0, 0, 270]) |
paul@0 | 83 | fillet(rr, height + extra); |
paul@0 | 84 | } |
paul@0 | 85 | } |
paul@0 | 86 | } |
paul@0 | 87 | |
paul@0 | 88 | cartridge(); |
paul@0 | 89 | |