Automating them is not too difficult either. You could use just a stepper motor (open loop) or servo+encoder (closed loop) to drive the turntable. [smashedagainst] needed to drill six radial holes ...

Prior knowledge needed: ECEA 5340 Sensors and Sensor Circuit ... of DC motors, traditional brushed motors, as well as electronically driven brushless motors. We will discuss shunt wound, series wound, ...