Idea for robot arms / prosthetics

James Newton wrote 09/13/2018 at 17:30 0 points

For people interested in designing low cost robotic arms / prosthetics, a quick crazy idea: Check out "twisted string actuators". Combined with a good joint position encoder (hint: Check out "Dexter Robot Arm" and dig into the magic of the encoders) they can make a very responsive but compliant joint with two smaller DC motors and only one drive transistor per motor! It also provides an easy way to transmit the power from the base (or at least further down) to the upper joints, reducing swung weight and increasing payload.