15-Year-Old Engineer Builds Cycloidal Gearbox and Python Generator Script

Project Overview

A 15-year-old engineer constructed a cycloidal gearbox and created a Python script to parametrically generate its design. The project involved several iterations, starting with a hand-cranked model to validate the Python generator.

Design Iterations and Challenges

An initial micro cycloidal gearbox, designed to fit a NEMA 17 footprint with a 1:9 ratio, did not function due to the tight tolerances required and the precision limitations of 3D printing. Subsequent versions addressed these issues by increasing the footprint to allow for greater tolerances, resulting in a fully functional gearbox compatible with a NEMA 17 motor.

Python Script Functionality

The Python script, based on a SolidWorks article, utilizes parametric equations to define the gearbox geometry. Key parameters include the number of pins and pitch radius for the housing, eccentricity of the input shaft, outer pin radius, and precision/profile offset for manufacturing clearance. The script also defines output pins and rotor clearance holes.

Future Improvements

Potential enhancements for the gearbox include replacing housing pins with MR128 bearings to reduce friction and increase efficiency. Output pins could be replaced with M2 screws with metal coverings to improve rigidity, maximize torque output, and further enhance efficiency.