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wheel.scad
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wheel.scad
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// Copyright 2013 Peter Withers
// Licensed as GPL 2
module tire(wheelDiameter, tireWidth){
rotate_extrude(convexity = 10, $fn = 100)
translate([wheelDiameter/2, 0, 0])
circle(r = tireWidth/2, $fn = 10);
}
module simpleRim(wheelDiameter, tireWidth){
rimThickness=3;
rimOffset = tireWidth/2-rimThickness/2;
translate([0,0,rimOffset])
cylinder(h=rimThickness, r=wheelDiameter/2,center=true);
}
module wheel(axilDiameter, wheelDiameter, tireWidth){
difference(){
union(){
tire(wheelDiameter, tireWidth);
simpleRim(wheelDiameter, tireWidth);
cylinder(h=tireWidth, r=axilDiameter/2+5,center=true);
}
cylinder(h=tireWidth*2, r=axilDiameter/2,center=true, $fn = 20);
}
}
module axilBush(axilDiameter, bushDepth, capHeight){
difference(){
union(){
cylinder(h=bushDepth, r=axilDiameter/2+5,center=true);
translate([0,0,bushDepth/2])cylinder(h=capHeight, r=axilDiameter/2+7,center=true);
}
cylinder(h=bushDepth*2, r=axilDiameter/2,center=true, $fn = 20);
}
}
wheel(4,50,10);
translate([-15,45,0]) axilBush(4, 5, 2);
translate([15,45,0]) axilBush(4, 5, 2);