Arduino GRBL CNC Shield

GRBL is an open source high performance, low cost CNC motion controller for Arduino hardware. It will run on any Arduino with an ATMega328P chip (Uno, Duemilanove etc.) and is an excellent alternative to typical parallel port CNC control.

For more information about the GRBL project see the official website here.

The Arduino GRBL Shield breaks out the standard Arduino pins to standard screw terminals for quick and easy setup of CNC and motion control systems.

The below video shows a simple XY plotter executing Gcode using GRBL (running on a m328p Uno) and the GRBL Shield.

Connection to external stepper motor drivers is simple and only requires step/pulse & direction (plus a common GND connection).

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