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fix screw threading for nuts to be consistent with how screws are done

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This commit is contained in:
Adrian Mariano
2021-11-20 20:59:13 -05:00
parent 956f845886
commit 2e2dadefed
2 changed files with 82 additions and 106 deletions
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24
threading.scad
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@@ -134,11 +134,25 @@ module threaded_rod(
// threaded_nut(od=16, id=8, h=8, pitch=1.25, left_handed=true, bevel=true, $slop=0.1, $fa=1, $fs=1);
module threaded_nut(
od, id, h,
pitch, starts=1, left_handed=false, bevel, bevel1, bevel2,
pitch, starts=1, left_handed=false, bevel, bevel1, bevel2, id1,id2,
anchor, spin, orient
) {
depth = pitch * cos(30) * 5/8;
profile = [
dummy1=
assert(all_positive(pitch))
assert(all_positive(id))
assert(all_positive(h));
basic = is_num(id) || is_undef(id) || is_def(id1) || is_def(id2);
dummy2 = assert(basic || is_vector(id,3));
depth = basic ? cos(30) * 5/8
: (id[2] - id[0])/2/pitch;
crestwidth = basic ? 1/8 : 1/2 - (id[2]-id[1])/sqrt(3)/pitch;
profile = [
[-depth/sqrt(3)-crestwidth/2, -depth],
[ -crestwidth/2, 0],
[ crestwidth/2, 0],
[ depth/sqrt(3)+crestwidth/2, -depth]
];
oprofile = [
[-6/16, -depth/pitch],
[-1/16, 0],
[-1/32, 0.02],
@@ -147,7 +161,9 @@ module threaded_nut(
[ 6/16, -depth/pitch]
];
generic_threaded_nut(
od=od, id=id, h=h,
od=od,
id=basic ? id : id[2], id1=id1, id2=id2,
h=h,
pitch=pitch,
profile=profile,starts=starts,
left_handed=left_handed,