CNC Shield for Arduino – GRBL-Compatible Stepper Motor Control Board

The CNC Shield for Arduino is a compact, powerful expansion board designed to transform your Arduino Uno into a fully functional CNC controller. Perfect for DIY CNC routers, laser engravers, and 3D carving machines, this shield supports GRBL firmware and up to 4 stepper motor driver modules (A4988 or DRV8825).

With clearly labeled pinouts and easy plug-and-play installation, the CNC Shield simplifies wiring and provides stable stepper motor control for X, Y, Z, and A (clone or 4th axis) channels.

Features:

• Compatibility: Arduino Uno R3

• Firmware Support: GRBL 0.8 / 0.9 / 1.1

• Driver Support: A4988 / DRV8825 / TMC2208 (in legacy mode)

• Stepper Channels: X, Y, Z, A (Y-axis clone option)

• Micro-stepping: Supports MS1, MS2, MS3 jumper selection

• Endstop Support: 3-axis limit switch connections

• Spindle Control: PWM spindle speed output

• Coolant Control & Enable Pins

• Power Input: 12–36V (motor power via driver modules)

• Applications:

  • DIY CNC routers

  • Laser engravers

  • Pen plotters

  • PCB milling machines

  • Small desktop CNC systems

Robust, affordable, and easy to use — the CNC Shield is the go-to solution for GRBL-powered CNC projects.