tsmthread v4

TL/DR,

include <tsmthread4.scad>;
// 4-start TR20x4 leadscrew, 15mm long
tsmthread(DMAJ=20, L=15, STARTS=4, PITCH=4, PR=THREAD_TRAP);

This is a fast and flexible thread-profile generator for OpenSCAD.

Also see /lib/dimensions for lots of references on screw thread profiles.

Known limitations:

Icon  Name                           Last modified      Size  Description
[PARENTDIR] Parent Directory - [IMG] TR11X2-diagram.jpg 2019-02-01 19:19 15K tsmthread4-mk5-acme.stl makes one of these [IMG] 3-8-10-flange-diagram.jpg 2019-02-01 19:19 27K tsmthread4-mk5-acme.stl makes one of these [IMG] cpu-killer.png 2019-01-30 16:34 16K [TXT] tsmthread4.scad 2019-01-30 04:38 31K [IMG] calibration.jpg 2019-01-30 04:38 296K What a mess. [   ] tsmthread4-mk5-print.stl 2019-01-30 04:38 786K Example print, household object threads [IMG] drillbit.png 2019-01-30 04:38 44K An example of an impossible thread profile [   ] tsmthread4-mk5-npt.stl 2019-01-30 04:38 2.4M Example print, 1 1/2, 1 1/4 NPT fittings [   ] tsmthread4-mk5-acme.stl 2019-01-30 04:38 1.1M Example print, TR11x2 and 3/8-10 leadscrews [IMG] thread-compensation.png 2019-01-30 04:38 15K What comp_thread does - better fit with less undersize [IMG] npt-profile.png 2019-01-30 04:38 14K Calculated profile vs perfect triangles [IMG] profile-test.jpg 2019-01-29 20:53 43K [IMG] all-threads.jpg 2019-01-29 20:53 96K
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