The CNC Shield V3 Expansion Board is a dedicated motion control shield designed for Arduino Uno to drive CNC machines, laser engravers, and 3D motion systems. It supports multiple stepper motor drivers and provides an easy, organized way to connect motors, limit switches, spindle control, and power supply. Widely used with GRBL firmware, this board is ideal for DIY CNC routers, engraving machines, and robotics projects.
Core Board Specifications
• Board Type: CNC expansion shield
• Compatible Controller: Arduino Uno
• Motion Control Axes: X, Y, Z, A (configurable)
• Firmware Support: GRBL
Electrical & Interface
• Operating Voltage (Logic): 5 V (from Arduino Uno)
• Motor Supply Voltage: 12–36 V DC (external)
• Stepper Driver Support: A4988, DRV8825
• Driver Slots: 4 (X, Y, Z, A)
• Microstepping Control: Jumpers for step resolution
• Endstop Inputs: X, Y, Z limit switches
• Control Pins: STEP, DIR, ENABLE via Arduino
Performance Characteristics
• Supports precise stepper motor control
• Stable operation with GRBL firmware
• Configurable microstepping for smooth motion
• Reliable signal routing for CNC applications
Physical Characteristics
• Board Type: Arduino shield form factor
• Motor Connectors: 4-pin headers
• Power Input: Screw terminal
• Compact and robust PCB design
Compatibility
• Arduino Uno R3
• A4988 and DRV8825 stepper drivers
• NEMA 17 / NEMA 23 stepper motors
• GRBL-based CNC software
• CNC routers, laser engravers, plotters
Key Advantages
• Plug-and-play CNC solution for Arduino
• Clean wiring and organized layout
• Supports multiple stepper drivers
• Large community and documentation support
Technical Insights
• Requires proper current tuning on stepper drivers
• External motor power supply mandatory
• Jumpers set microstepping modes
• Heatsinks and cooling recommended for drivers
Applications
• CNC milling and routing machines
• Laser engraving and cutting systems
• Drawing and plotting machines
• DIY automation and motion platforms
• Educational CNC and robotics projects
Pro Tip
• Always set driver current before running motors
• Use proper cooling for DRV8825 drivers
• Do not insert/remove drivers while powered
• Flash GRBL firmware before operation
Package Includes
• 1 × CNC Shield V3 Expansion Board