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threading bugfix

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This commit is contained in:
Adrian Mariano 2026-01-09 15:54:01 -05:00
parent e5b0fcfb34
commit b5f6901d4b
1 changed files with 5 additions and 5 deletions
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10
threading.scad
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@ -1158,18 +1158,18 @@ module bspp_threaded_rod(
d = INCH * bspp_dimensions[index[0]][1][_diameter];
theta = 55 / 2;
H = p / (2 * tan(theta)); // : fundamental triangle height
h = 2 * H / 3; // : actual depth of the thread
hh = 2 * H / 3; // : actual depth of the thread
e = H * sin(theta) / 6; // : rounding arc's height
r = e / (1 - sin(theta)); // : rounding arc's radius
s = h - 2 * e; // : straight flank depth
s = hh - 2 * e; // : straight flank depth
c = tan(theta) * (H / 6 + e); // : crest's half width
pStart = [-c, -e];
pEnd = [c, -e];
vStart = [(p / 2 - tan(theta) * (H / 6 + e)), -h + e];
vEnd = [p / 2, -h];
vStart = [(p / 2 - tan(theta) * (H / 6 + e)), -hh + e];
vEnd = [p / 2, -hh];
segments = 4;
// right valley rounding:
valley = arc(n = segments, cp = [p / 2, -(h - r)], points = [vStart, vEnd]);
valley = arc(n = segments, cp = [p / 2, -(hh - r)], points = [vStart, vEnd]);
//stroke(valley, width = 0.01, color = "cyan");
// peak rounding:
peak = arc(n = 2 * segments, cp = [0, -r], points = [pStart, pEnd]);