This is pretty cool, but be careful with grbl. It has software bug on G2/G3 commands with large (20 meters) radius – it just starts jogging forever which might damage CNC hardware.

The project uses an Arduino Uno R3, Arduino Mega 2560, Arduino CNC Shield V3 GRBL, Stepper Motor Driver A4988 and Arduino L293D Motor Shield together with a couple of wooden wine boxes to create a ...