72 lines
2.4 KiB
OpenSCAD
72 lines
2.4 KiB
OpenSCAD
include <./common/common.scad>;
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FN = 100;
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$fn = FN;
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SprocketBaseD = 19.05; //8 frames
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SprocketBaseH = 2.7;
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SprocketH = 10;
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SprocketW = 0.79;
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SprocketL = 1.3;
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SprocketAngle = 7;
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SprocketAngleZ = 1.5;
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InnerD = 13.98;
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InnerH = 10.6;
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TopBaseD = 18.47;
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TopBaseH = 2.96;
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LipD = 18.84;
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LipH = 0.33;
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TopD = 21.66;
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TopH = 1.4;
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HollowD = 4.7;
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HollowBaseD = 12.01;
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HollowBaseH = 6.09;
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module sprocket (pos = [0, 0, 0], rot = [0, 0, 0], bevel = false) {
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//cube([SprocketL, SprocketW, SprocketH], center = true);
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$fn = 50;
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translate (pos) rotate(rot) {
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difference () {
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translate([0, 0, 0]) scale([1, 1, 2.25]) rotate([90, 0, 90]) cylinder(r = SprocketW/2, h = SprocketL, center = true);
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translate([0, 0, -1]) cube([2, 2, 2], center = true);
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if (bevel) {
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translate([SprocketAngleZ, 0, 0]) rotate([0, -SprocketAngle, 0]) cube([2, 2, 3], center = true);
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translate([-SprocketAngleZ, 0, 0]) rotate([0, SprocketAngle, 0]) cube([2, 2, 3], center = true);
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}
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}
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}
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}
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module sprocketed_roller (pos = [0, 0, 0], bevel = false) {
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SoundtrackH = (TopBaseH / 2) + InnerH + (SprocketBaseH / 2);
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translate(pos) {
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difference () {
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union () {
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//sprocket base
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cylinder(r = R(SprocketBaseD), h = SprocketBaseH, center = true);
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//center
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translate([0, 0, (InnerH / 2) + (SprocketBaseH / 2)]) cylinder(r = R(InnerD), h = InnerH, center = true);
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//soundtrack area
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translate([0, 0, SoundtrackH]) cylinder(r = R(TopBaseD), h = TopBaseH, center = true);
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translate([0, 0, SoundtrackH - (TopBaseH / 2) + (LipH / 2)]) cylinder(r = R(LipD), h = LipH, center = true);
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translate([0, 0, SoundtrackH + (TopBaseH / 2) - (LipH / 2)]) cylinder(r = R(LipD), h = LipH, center = true);
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translate([0, 0, SoundtrackH + (TopH / 2) + (TopBaseH / 2) - (LipH / 2)]) cylinder(r = R(TopD), h = TopH, center = true);
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}
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cylinder(r = HollowD / 2, h = 100, center = true);
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translate([0, 0, (HollowBaseH / 2) - (SprocketBaseH / 2)]) cylinder(r = R(HollowBaseD), h = HollowBaseH + 0.1, center = true);
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}
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for (i = [0: 8]) {
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rotate([0, 0, i * 360 / 8]) sprocket([(SprocketBaseD / 2) -.01, 0, (SprocketBaseH / 2) - (SprocketL / 2)], [0, 90, 0], bevel);
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}
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}
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}
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sprocketed_roller( bevel = true);
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