The Scotch Yoke is a mechanical mechanism that converts rotational motion into linear reciprocating motion. However, it feels that the reciprocating motion alone is a bit monotonous, so a circular ring structure was designed to drive the ball to move. Can the energy of reciprocating motion make the ball rotate along the circular ring? Try it yourself~

Required hardware parts:
1. N20 reduction motor
2. PMW DC motor speed regulator
3. Wires, batteries, battery boxes
4. M6 × 80 (2x) cylindrical pin
5. M3 × 10 (11x) countersunk screw
6. M2 × 10 (4x) countersunk screw
7. M3 × 5 (4x) flat head screw
8. M2 × 5 × 3.2 (4x) hot melt nut

If you do not have or do not want to use hot melt nuts, you can print configurations that do not require hot melt nuts.

Screw position diagram：