- for (otherside=[0,1]) {
- for (circum = [300:100:1500]) {
- assign(rad = circum / tau)
- assign(fn = str("filamentspool-number-n",circum,".dxf"))
- assign(rotateoffset = [0, totalwidth/2, 0])
- assign(xlen = rad - real_exteffrad) {
- if (xlen >= numbers_tick_width/2
- + (otherside ? numbers_height_allow : 0) &&
- xlen <= length - (otherside ? 0 : numbers_height_allow))
- translate([xlen, -armendwallthick,
- -armendbasethick + (totalheight - numbers_tick_len)/2])
- translate(rotateoffset)
- rotate([0,0, otherside*180])
- translate(-rotateoffset){
- translate([-numbers_tick_width/2, -1, 0])
- cube([numbers_tick_width, numbers_relief+1, numbers_tick_len]);
- translate([numbers_tick_width/2 + numbers_tick_linespc,
- 1,
- numbers_tick_len])
- rotate([90,0,0])
- rotate([0,0,-90])
- linear_extrude(height= numbers_relief+1)
- // scale(templatescale)
- import(file=fn, convexity=100);
- }
+ difference(){
+ union(){
+ difference(){
+ translate([0, -armendwallthick, -armendbasethick])
+ cube([length, totalwidth, totalheight]);
+ translate([-1, 0, 0])
+ cube([length+1 - ratchettooth, channelwidth, channeldepth+1]);
+ translate([-1, 0, ratchettoothheight])
+ cube([length+2, channelwidth, channeldepth+1]);
+ }
+ for (dx = [0 : ratchetstep : length - ratchetstep]) translate([dx,0,0]) {
+ translate([ratchettoothsmoothr+0.5, armendwallthick/2, 0]) minkowski(){
+ rotate([90,0,0])
+ cylinder($fn=20, r=ratchettoothsmoothr, h=armendwallthick);
+ multmatrix([ [ 1, 0, ratchettoothslope, 0 ],
+ [ 0, 1, 0, 0 ],
+ [ 0, 0, 1, 0 ],
+ [ 0, 0, 0, 1 ]])
+ cube([ratchettooth - ratchettoothsmoothr*2,
+ channelwidth, ratchettoothheight - ratchettoothsmoothr]);
+ }