step-files
Parametric cycloidal drive (gearbox) generator: exact conjugate geometry, live 2D and 3D, 56 self-explaining checks, a full engineering datasheet — contact stress, stiffness, backlash, transmission error, thermal, mass — requirements-driven design search, and DXF/SVG/STEP/STL/3MF/GIF/BOM/PDF output.
The testing framework CAD never had — automated validation, interference detection, and structural analysis for STEP assemblies. Like pytest for mechanical design.