64 lines
2.0 KiB
OpenSCAD
64 lines
2.0 KiB
OpenSCAD
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height = 13.25;
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topDiameter =9.75;
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lowerDiameter = 10.85;
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stepDiameter = 9;
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stepDepth = 1.5;
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crossDepth = .75; // original mesurement ~0.25
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crossWidth = 2.25;
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crossStartHeight = 2;
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// mostly not really measured
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chamferHeight = 10;
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chamferDiameter = topDiameter-crossDepth*2;
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// measured from metal pole, not plastic knob
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knobDepth = 7;
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knobDiameter = 4.75;
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knobFlatDiameter = 4;
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knobTolerance = 0.1;
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$fn = 100;
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difference () {
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union() {
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translate([0,0,stepDepth]) {
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difference() {
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// main exterior
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intersection() {
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cylinder(r1=lowerDiameter/2, r2=topDiameter/2, h=height-stepDepth);
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// chamfer
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union() {
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translate([0,0,chamferHeight])
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cylinder(r1=lowerDiameter/2, r2=chamferDiameter/2, h=height-stepDepth-chamferHeight);
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cylinder(r=lowerDiameter/2, h=chamferHeight);
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}
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}
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// cross
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difference() {
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union() translate([0, 0, height/2 - .01]) {
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cube([lowerDiameter, crossWidth, height], center=true);
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cube([crossWidth, lowerDiameter, height], center=true);
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}
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// put back the middle
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cylinder(r1=lowerDiameter/2 - crossDepth,
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r2=topDiameter/2 - crossDepth, h=height-stepDepth);
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// put back the bottom
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cylinder(r=lowerDiameter, h=crossStartHeight);
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}
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}
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}
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//bottom step
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cylinder(r=stepDiameter/2, h=stepDepth+0.01);
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}
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//inner concavity
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difference() {
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translate([0,0,-0.01]) cylinder(d=knobDiameter + knobTolerance*4, h=knobDepth + 0.01);
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#translate([-stepDiameter/2, knobFlatDiameter - knobDiameter/2 + knobTolerance*5, 0])
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cube([stepDiameter, stepDiameter, height]);
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}
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}
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