MACH3 Interface Board CNC 5 Axis with Optocoupler

MACH3 Interface Board CNC 5 Axis with Optocoupler provides a professional, stable, and high-speed interface between your PC and motor drivers to facilitate precise CNC machine control. This breakout board supports up to five axes of movement, allowing you to manage complex 3D milling or routing tasks with a single hardware interface. Furthermore, the board incorporates full optocoupler isolation for all input signals, which effectively shields your computer’s parallel port from high-voltage transients and electrical noise.

Key Features:

• 5-Axis Control: The board features dedicated outputs to control up to five stepper or servo motor drivers simultaneously for multi-axis synchronization.
• Optocoupler Isolation: High-speed optical isolators protect the parallel port pins from feedback, preventing damage to the host PC during a fault.
• Relay Output Control: An onboard electromagnetic relay allows the software to toggle a spindle motor, water pump, or other AC/DC peripherals.
• 0-10V Analog Output: This feature provides a variable voltage signal to control the speed of a spindle via a Variable Frequency Drive (VFD).
• Dual Power Supply: The module separates the USB power (for internal logic) from the external 12-24V power (for the relay and VFD signal) to maintain noise immunity.

Technical Specifications:

• Software Compatibility: MACH3, KCAM4, EMC2, and other parallel port CNC software.
• Input Voltage (Logic): 5 V_DC via USB port.
• Input Voltage (Peripherals): 12 V_DC to 24 V_DC.
• Maximum Pulse Frequency: ≈ 100 kHz (Software dependent).
• Input Channels: 5 Isolated Digital Inputs (e.g., Limit, E-Stop, Probe).
• Output Channels: 5 Axis Pulse/Direction outputs + 1 Relay + 1 Analog 0-10V.
• Operating Temperature: −10°C to +60°C.

Mechanical Specifications:

• PC Interface: Standard DB25 Parallel Port Connector.
• Terminal Blocks: Screw-type terminals for secure wiring of motors and sensors.
• Construction: High-quality dual-layer FR4 PCB with green solder mask.
• Mounting: Four 3 mm pre-drilled holes for easy installation into control cabinets.

Dimensions:

• Board Length: ≈ 90 mm.
• Board Width: ≈ 70 mm.
• Board Height: ≈ 18 mm.
• Weight: ≈ 75 g.

Pinout and Wiring:

• P1 (PWM/Relay): Generally used for spindle control via PWM or the onboard relay.
• P2, P3 (X-Axis): Pulse and Direction pins for the first axis driver.
• P4, P5 (Y-Axis): Pulse and Direction pins for the second axis driver.
• P6, P7 (Z-Axis): Pulse and Direction pins for the third axis driver.
• P8, P9 (A-Axis): Pulse and Direction pins for the fourth axis driver.
• P16, P17 (B-Axis): Pulse and Direction pins for the fifth axis driver.
• P10 – P13, P15 (Inputs): Reserved for Limit switches, Home sensors, and Emergency Stop buttons.
• Wiring Note: However, ensure that the common cathode or common anode configuration of your motor drivers matches the breakout board wiring to prevent signal inversion.

Datasheet Reference:

• Download MACH3 5-Axis Breakout Board User Manual

Commonly Used in:

• DIY CNC Routers: Providing the primary communication link for custom-built wood and soft-metal engraving machines.
• Plasma Cutters: Managing the high-speed motion required for precise torch paths in metal fabrication.
• 3D Printers: Acting as a high-voltage interface for large-format industrial 3D printing rigs.

Applications:

• Automated Milling: Controlling X, Y, and Z axes along with rotary attachments for complex part machining.
• Laser Engraving: interfacing with CO2 laser power supplies for precise beam modulation and motion.
• Industrial Education: Used in technical colleges to teach the fundamentals of CNC hardware and G-code execution.

Equivalent Models:

• ST-V2 Breakout Board: A nearly identical version often found in standard CNC kits with the same DB25 interface.
• USB MACH3 Motion Controller (AKZ250): A more advanced alternative that uses USB instead of a parallel port, however, it requires different software plugins.
• NVCM 6-Axis Board: A higher-density board supporting an additional axis for complex robotic arms.

Package Includes:

• 1 x MACH3 Interface Board CNC 5 Axis with Optocoupler
• 1 x USB Power Cable