"Revolutionary 3D Printed Sphere-Making Machine Unveiled"

A 3D printed wooden ball polisher, designed by [Fraens], uses gear motors and cup-shaped grinding pads to maintain constant pressure on the developing sphere, while a triangular frame with springs pre-loads the arms and pulls them in toward the workpiece. The machine supports aggressive tooling and is capable of creating a final polished sphere, but concerns about its endurance due to vibrations and debris are raised.