Medical 3D Printing & Bioprinting
This project from Martin Vincent Bloedorn is a 3D printed prosthetic hand which in many ways functions just like a human hand, but it uses actuated motors with a linkage that drives each finger via a threaded rod.
The motor and drive screw alone are capable of lifting a couple of pounds, and Bloedorn’s design uses the servo motor’s potentiometer to create a feedback loop that uses the position of each finger to drive electronics.