Parametric Cycloid Gear

thingiverse

This is an initial attempt at creating a parametric object, specifically a cycloid gear. The primary factors defining its features include circular pitch and number of teeth, with other dimensions derived from these parameters. If two gears have the same circular pitch, they should mesh perfectly. Kindly test the object and report any bugs to this post; revisions will also be shared on GitHub. Remember that OpenSCAD is required for converting this script into a gear STL file. The CycloidGear module is crucial and follows a prototype format. Key parameters include num_teeth (number of teeth), circ_pitch (circular pitch, length of arc from one tooth's center to the next along root circle), base_circle_ratio, pinion_circle_ratio, and h (gear height). Optional parameters define the ratios of the base and pinion circles to the circular pitch. The gear's origin is at the context's origin, with its rotational axis aligned with Z. A hole for an axle isn't included in this module, and $precision controls polygon count for constructing tooth curves.