Very Simple Gears

I created this very small OpenSCAD file to create very basic gears for transmitting power from stepper motors primarily, and in this instance to move a carriage along a multitap inductor for selecting different inductances.

The OpenSCAD file is just a text file comprising the OpenSCAD scripts to generate the gears.

There is no science behind the generation of the teeth, but for simple applications I have found them useful at the default settings:

Pitch = 2.0;
ToothH = 1.5;
ToothSlopeAngle = 75;
MeshFactor = Pitch/20;

For printing I have set layer height to either 0.1mm or 0.15mm, and have printed in PLA and ABS. In the photo attached, black is ABS-X printed on a Prusa i3, and white is 3DJake Eco PLA Tough printed on a FlashForge Guider 2.

I have included a number of ratios in pre-created STL files at 5mm gear thickness for a 4mm central axle, with 2 STL files for 5mm (Std Stepper Motor compatible).

The following modules create the gears (lines 33 to 48 of the SCAD