51 lines
1.2 KiB
OpenSCAD
51 lines
1.2 KiB
OpenSCAD
//------------------------------------------------------------
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// Parametric pendulum rod coupling to increase frame stiffness
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//
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// http://www.thingiverse.com/wardwouts
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//
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// You'll need four of these to connect two bars and an appropriate
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// M3 screw and nut
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//------------------------------------------------------------
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// This needs to be tight, so about 5.8-ish for M6; 7.8-ish for M8
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M6 = 5.8;
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// And this can have some play
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M3 = 3.5;
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// Thickness at its weakest point
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thickness = 3;
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// Distance between the two holes
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seperation = 1.5;
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// Diameter of the disc
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diameter = 30;
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//80 for nice cylinders; 16 for speed
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FN=80*1;
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height = M6/2 + thickness;
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echo(str("========================================"));
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echo(str("The combined height will be ", height*4, " mm"));
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echo(str("So use a screw of at least ", round(height*4 +5), " mm length"));
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echo(str("========================================"));
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module base(){
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difference(){
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cylinder(h=height, r=diameter/2, $fn=FN);
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union(){
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translate([0,0,-height/2]){
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cylinder(h=height*2, r=M3/2, $fn=FN);
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}
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translate([-diameter/2,M3/2+M6/2+seperation,height]){
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rotate([0,90,0]){
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cylinder(h=diameter*2, r=M6/2, $fn=FN);
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}
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}
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}
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}
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}
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base();
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