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Minor tweaks to Shapes2d tutorital.

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Garth Minette
2022-01-07 19:31:58 -08:00
parent 592e367cfb
commit 8d9d1f46a6
3 changed files with 102 additions and 22 deletions
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44
screw_drive.scad
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@@ -16,7 +16,7 @@
// Creates a mask for creating a Phillips drive recess given the Phillips size. Each mask can
// be lowered to different depths to create different sizes of recess.
// Arguments:
// size = The size of the bit as a number or string. "#0", "#1", "#2", "#3", or "#4"
// size = The size of the bit as an integer or string. "#0", "#1", "#2", "#3", or "#4"
// ---
// anchor = Translate so anchor point is at origin (0,0,0). See [anchor](attachments.scad#subsection-anchor). Default: `CENTER`
// spin = Rotate this many degrees around the Z axis after anchor. See [spin](attachments.scad#subsection-spin). Default: `0`
@@ -323,4 +323,46 @@ module torx_mask(size, l=5, center, anchor, spin=0, orient=UP) {
}
// Section: Robertson/Square Drives
// Module: robertson_mask()
// Usage:
// robertson_mask(size, [extra]);
// Description:
// Creates a mask for creating a Robertson/Square drive recess given the drive size as an integer.
// Arguments:
// size = The size of the square drive, as an integer from 0 to 4.
// extra = Extra length of drive mask to create.
// Example:
// robertson_mask(size=2);
// Example:
// difference() {
// cyl(d1=2, d2=8, h=4, anchor=TOP);
// robertson_mask(size=2);
// }
module robertson_mask(size, extra=1) {
assert(is_int(size) && size>=0 && size<=4);
Mmin = [0.0696, 0.0900, 0.1110, 0.1315, 0.1895][size];
Mmax = [0.0710, 0.0910, 0.1126, 0.1330, 0.1910][size];
M = (Mmin + Mmax) / 2 * INCH;
Tmin = [0.063, 0.105, 0.119, 0.155, 0.191][size];
Tmax = [0.073, 0.113, 0.140, 0.165, 0.201][size];
T = (Tmin + Tmax) / 2 * INCH;
Fmin = [0.032, 0.057, 0.065, 0.085, 0.090][size];
Fmax = [0.038, 0.065, 0.075, 0.095, 0.100][size];
F = (Fmin + Fmax) / 2 * INCH;
ang = 2;
h = T + extra;
down(T) {
intersection(){
Mtop = M + 2*adj_ang_to_opp(F+extra,ang);
Mbot = M - 2*adj_ang_to_opp(T-F,ang);
prismoid([Mbot,Mbot],[Mtop,Mtop],h=h,anchor=BOT);
cyl(d1=0, d2=M/(T-F)*sqrt(2)*h, h=h, anchor=BOT);
}
}
}
// vim: expandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap