Robotic Hand

2023: Based on this sketch from Alex, I used Fusion to design the parts, lasercut them out of 1/8" plywood. All the little holes are for 1/8" dowels.

hand5.dxf    29×15.5 cm
digit3.dxf    29×6 cm
Boss power 70 speed 20, Zing speed 50 power 60.

The rubber band keeps the finger straight. The dowels along the top of the finger prevent it from hyperextension.

Pulling the string flexes the knuckles. The dowels along the bottom prevent each joint from folding more than 90°.

Assembly steps are here

Alex's complete project documentation