69 lines
1.8 KiB
OpenSCAD
69 lines
1.8 KiB
OpenSCAD
// Diameter of the coin (mm)
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diameter = 39;
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// Height of the coin (mm)
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height = 3.5;
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// Engraving depth (mm)
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depth = 0.4;
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// Number of sides on your coin
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sides = 360; // [3:360]
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// How many spokes do you want?
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spokes = 6; // [0:12]
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// Text to display
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text = "100";
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// The font must be installed locally on your system
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font = "Droid Sans:style=Bold";
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fontScale = (
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sides == 3 ? 0.50
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: sides == 4 ? 0.80
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: sides == 5 ? 0.80
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: sides == 6 ? 0.90
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: 1.00
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);
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// Enough width to fit four digits
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fontSize = diameter * 0.21 * fontScale;
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// Rotate odd-numbers of sides to maximize width
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rotation = (sides%2)?90:0;
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module chip() {
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intersection() {
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cylinder(h=height, d=diameter, center=true, $fn=sides);
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union() {
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difference() {
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cube([diameter, diameter, height], center=true);
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difference() {
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cylinder(h=height, d=diameter*0.8, center=true, $fn=sides);
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cylinder(h=height, d=diameter*0.7, center=true, $fn=sides);
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}
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}
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spokeHeight = height - (2*depth);
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if (spokes == 0) {
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cube([diameter, diameter, spokeHeight], center=true);
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} else {
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spokeWidth = (diameter/spokes) * 0.8;
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rotate((sides+spokes)%2?90:0) {
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for (i = [0 : 360/spokes : 360]) {
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rotate(i) translate([diameter/2, 0, 0]) cube([diameter, spokeWidth, spokeHeight], center=true);
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}
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}
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}
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}
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}
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}
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difference() {
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rotate(rotation) chip();
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translate([0, 0, height/2-depth])
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linear_extrude(height=depth+0.1, convexity = 10, twist = 0)
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text(text=text, font=font, size=fontSize, halign="center", valign="center");
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}
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