CNC Shield for Arduino UNO

The CNC Shield for Arduino UNO is a compact and powerful board designed to turn your Arduino into a complete CNC controller. If you’re building a 3D printer, laser engraver, or milling machine, this shield is a must-have. It allows you to connect up to four stepper motor drivers and offers ports for endstops, spindle control, and cooling fans.

Thanks to its standard GRBL compatibility, the CNC Shield can be used with popular open-source software for motion control. This makes it easier for you to load G-code and run your projects using free tools.

Each axis (X, Y, Z, and A) supports a removable stepper motor driver (like A4988 or DRV8825), which means you can customize the power and microstepping to match your machine’s needs. In addition, the shield includes pins for limit switches and a separate port for spindle enable and direction control.

The board fits directly onto an Arduino UNO, saving space and simplifying wiring. You can also connect this CNC shield with components from our Electronics Components and Tools and Accessories sections to complete your machine build.

Key Features

• ✅ Supports 4 stepper motor drivers (X, Y, Z, and A-axis)

• ✅ Compatible with A4988 / DRV8825 driver modules

• ✅ Ready for GRBL firmware (v0.9 and above)

• ✅ Ports for endstops, spindle, and cooling fan

• ✅ Stackable design for compact CNC builds

• ✅ Fits perfectly with Arduino UNO

Applications and Use Cases

• 🛠️ DIY CNC milling machines and routers

• 🔦 Laser engraving projects

• 🧩 Custom 3D printer controller boards

• 🪚 Small-scale wood carving machines

• 🎓 Perfect for STEM education and robotics labs

Technical Specifications

• Driver Support: A4988, DRV8825

• Axis Control: X, Y, Z, and A (clonable to X/Y)

• Firmware: GRBL-compatible (open source)

• Power Supply: 12V–36V via external driver boards

• Pin Headers: Standard 2.54mm pitch

• Size: Arduino UNO footprint

• Endstop Connectors: 6 inputs for min/max switches

• Additional Ports: Spindle enable/direction, fan

Precautions

• ⚠️ Double-check stepper driver orientation before powering on

• ⚠️ Use heat sinks and cooling for high-current driver boards

• ⚠️ Ensure proper voltage from external power supply

• ⚠️ Keep away from metal shavings during milling

Recommended Pairings

• Pair with Arduino UNO Boards

• Use with A4988 or DRV8825 stepper motor drivers

• Combine with Stepper Motors and Sensors

• Enhance builds with tools from Tools and Accessories

📺 YouTube Tutorial

Watch: How to Set Up a CNC Shield with Arduino UNO and GRBL

🛒 Buy Now

Grab the CNC Shield for Arduino UNO today from our Arduino and Accessories collection and start building your own CNC machine with ease.