63 lines
No EOL
1.8 KiB
OpenSCAD
63 lines
No EOL
1.8 KiB
OpenSCAD
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module key_dial(alphabet="ABCDEFGHIJKLMNOPQRSTUVWXYZ", key="C", width=7, dia=50, thick=5.5, key_width=4, key_height=3, text_depth=1, font_size=-1, antipick=1.5, tolerance = 0.2, $fn = 60) {
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key_indices = search(key, alphabet, 0);
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assert(len(key_indices[0]) == 1, "key character not unique");
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key_index = key_indices[0][0];
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_font_size = font_size > 0 ? font_size : min(dia*PI/len(alphabet)/1.6, dia/10);
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rotate([-0.5/len(alphabet)*360,0,0]) {
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difference() {
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rotate([0,90,0]) {
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cylinder($fn=$fn, h=width, d=dia, center=true);
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}
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// inner ring
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rotate([0,90,0]) {
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cylinder($fn=$fn, h=width+2, d=dia-thick*2, center=true);
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}
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// key
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rotate([((0.5+key_index)/len(alphabet)) * 360,0,0]) {
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translate([0,0,dia/2-thick]) {
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cube([width+2, key_width, key_height*2], center=true);
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}
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}
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// anti-picking keys
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for (i = [1:len(alphabet)]) {
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rotate([((i+0.5)/len(alphabet)) * 360,0,0]) {
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translate([width/2,0,dia/2-thick]) {
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cube([2*antipick, key_width, key_height*2], center=true);
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}
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}
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}
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// text
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for (i = [0:len(alphabet)]) {
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rotate([((i+0.5)/len(alphabet)) * 360,0,0]) {
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translate([-width/2-1,-dia/2,dia/2-0.3]) {
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cube([width+2,dia,5]);
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}
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translate([0,0,dia/2-text_depth-0.3]) {
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linear_extrude(height=text_depth+1, convexity=3) {
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text(alphabet[i], size=_font_size, halign="center", valign="center");
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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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}
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// DEFAULTS FOR COMMAND LINE INVOCATION
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ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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KEY = "C";
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DIAMETER = 50;
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TOLERANCE = 0.2;
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FN = 120;
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INDEX = 0;
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rotate([0,-90,0]) {
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key_dial(
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alphabet=ALPHABET,
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key=KEY,
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dia=DIAMETER,
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tolerance=TOLERANCE, $fn=FN);
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} |