Arduino CNC Shield V3 Driver Expansion Board

The Arduino CNC Shield V3 is an expansion board designed to convert an Arduino UNO into a multi-axis motion control system for CNC machines, 3D printers, laser engravers, and robotic positioning systems. It supports open-source GRBL firmware, enabling precise control of stepper motors through G-code commands. The shield provides plug-in interfaces for stepper motor driver modules such as A4988 and DRV8825, allowing easy configuration of up to 4 motion axes (X, Y, Z, and A). Each axis is controlled using step/direction signals from the Arduino, while onboard headers support limit switches, spindle control, and auxiliary functions required in CNC automation systems.