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Added starts support for helix_thread()

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This commit is contained in:
Garth Minette 2021-06-23 17:59:04 -07:00
parent eef462a1b6
commit 6455634fd9
1 changed files with 6 additions and 3 deletions
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9
threading.scad
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@ -22,6 +22,7 @@
// twist = Number of degrees to rotate thread around. Default: 720 degrees.
// ---
// profile = If an asymmetrical thread profile is needed, it can be specified here.
// starts = The number of thread starts. Default: 1
// left_handed = If true, thread has a left-handed winding.
// internal = If true, invert threads for internal threading.
// d1 = Bottom inside base diameter of threads.
@ -46,11 +47,11 @@
// thread_helix(d=10, pitch=2, thread_depth=0.75, thread_angle=15, twist=900, $fn=72);
module thread_helix(
d, pitch=2, thread_depth, thread_angle=15, twist=720,
profile, left_handed=false, internal=false,
profile, starts=1, left_handed=false, internal=false,
d1, d2, higbee, higbee1, higbee2,
anchor, spin, orient
) {
h = pitch*twist/360;
h = pitch*starts*twist/360;
r1 = get_radius(d1=d1, d=d, dflt=10);
r2 = get_radius(d1=d2, d=d, dflt=10);
tdp = thread_depth / pitch;
@ -73,7 +74,9 @@ module thread_helix(
dir = left_handed? -1 : 1;
idir = internal? -1 : 1;
attachable(anchor,spin,orient, r1=r1, r2=r2, l=h) {
spiral_sweep(pline, h=h, r1=r1, r2=r2, twist=twist*dir, higbee=higbee, higbee1=higbee1, higbee2=higbee2, anchor=CENTER);
zrot_copies(n=starts) {
spiral_sweep(pline, h=h, r1=r1, r2=r2, twist=twist*dir, higbee=higbee, higbee1=higbee1, higbee2=higbee2, anchor=CENTER);
}
children();
}
}