He has made a robotic arm called dARM. It is a robotic arm with 6 degrees of freedom, and most of the parts are 3D printed. He has used brushless DC motors for its working rather than servo motors.

It changes with speed, motor RPMs, and throttle input. It’s a digital symphony—think Wagner, but composed by a synthesizer and played by a spaceship. Yes, that’s mortgage money—but this isn’t just a ...