This product is courtesy of It was super easy to make this mobile tracked platform and radio-controlled useful for building ...

The controller in question is a 4QD Porter 10 so an extra component is a DC-to-DC converter to provide a floating ground for the Arduino.

My CNC is built from 2 DC servo motors for X, Y axis and 1 stepper motor for Z axis.” Watch this video on YouTube. “Motor voltage: 24 VDC, 38 VDC (E-type).