Screw Library

This is the Thing page for the Screw Library I am working on. I could be talked into releasing it as Public Domain, but have left it as CC-BY-SA for now, at least until it's fully stabilized.

The latest code is available on GitHub here:

https://github.com/syvwlch/Thingiverse-Projects/tree/master/Threaded%20Library

Currently, the library allows you to create a threaded rod with a trapezoidal profile, like the Acme or metric lead screws that are so common in CNC machines.

The trapezoidThread module creates the rod along Z, centered in X and Y, but not in Z. Same logic as cylinders with center=false.

The parameters are the following:

length
// axial length of the threaded rod
// used to calculate how many turns to create
// the rod is NOT trimmed to this length!!!

pitch
// axial distance from crest to crest

pitchRadius
// radial distance from center to mid-profile

threadHeightToPitch
// ratio between profile height and pitch
// default value is 0.5

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