Motion test of my new draw bot. I have made my own DC servos by using a gear motor and a hall effect absolute angular position sensor. So now I can send a position over serial, and the robot will attempt to move there from wherever it is. I am using a PID loop to achieve this but still need to do some tweaking as you can see from the oscillations. Mostly this is due to the inertia of the arm being radically different depending on the extension.