CNC Shield V4 for Arduino Nano — 3‑Axis Stepper Control

The CNC Shield V4 is a compact driver expansion board designed for the Arduino Nano microcontroller. Ideal for 3D printers, laser engravers, and three‑axis CNC machines, it provides three sockets for A4988 stepper motor driver modules (not included) to control three independent stepper channels (X/Y/Z). Each channel uses only two digital IO pins (STEP and DIR), allowing efficient control of three motors with just six IO pins via GRBL or custom firmware. This shield simplifies motion control for both electronics hobbyists and engineers.

⭐ Key Features

• Three‑axis control (X/Y/Z) for CNC and motion projects 🧭
• 3× A4988 driver sockets (modules not included); microstepping supported as provided by the installed driver
• Two‑phase, four‑wire stepper motors supported up to 2 A per phase (driver‑limited)
• Digital IO interface for easy connection to endstops and other electronics modules 🔌
• I2C header for LCD I2C displays or other I2C modules 🖥️
• Power: motor supply 7.5–12 V DC; 5 V logic via Nano or 5 V interface
• GRBL‑compatible motion control; optimized for Arduino ecosystem
• Great for DIY CNC, Raspberry Pi G‑code sender setups (via USB to Nano), and rapid prototyping

📐 Technical Specifications

• Axes: 3 (X, Y, Z)
• Driver sockets: 3 × A4988 (not included)
• Motor type: 2‑phase, 4‑wire stepper motors, up to 2 A per phase
• Control signals: STEP and DIR per axis (total 6 digital IO pins)
• Interfaces:
  Digital IO for ENDSTOP and external modules
  I2C interface for LCD I2C or other I2C modules
• Power:
  Motor supply input: 7.5–12 V DC
  Logic: 5 V DC interface (typically provided by the Arduino Nano)
• Compatibility: Arduino Nano microcontroller; GRBL firmware
• Board type: CNC Shield V4

🧰 Applications

• 3D printers and motion platforms
• Laser engraving and plotters
• Three‑axis CNC routers and mini mills
• Educational and prototyping projects with Arduino and Raspberry Pi (as a host sender)

🔎 Notes for Best Results

• Set the current limit on each A4988 driver to protect motors and drivers; ensure adequate cooling as needed.
• Microstepping behavior depends on the installed driver module (e.g., A4988); configure MS pins per your step resolution.
• Use a stable voltage source for the motor supply (7.5–12 V DC) and observe proper grounding between power and logic.

📦 Package Contents

Arduino Nano CNC Shield V4

⚠️ Important

The Arduino Nano and A4988 driver modules are NOT included.