Optocoupler Isolation with Automatic Recognition: Enhanced with offline recognition, this CNC engraver control board allows simultaneous connection of an offline module and computer. The optocoupler isolation in the spindle drive minimizes heat generation, ensuring linear and safe spindle speed regulation. Improved USB Interface: Upgraded USB interface with a plug-in design for enhanced durability, reducing the risk of detachment due to transportation or improper use. Versatile Compatibility: Compatible with GRBL Controller and UniversalGcodeSender software, supporting stepper motors with 12V and a maximum current of 2A. Suitable for 42 or 57 stepper motors. Spindle and Laser Support: Equipped to support 400W DC spindle motors and lasers, providing comprehensive control for three axes, spindle, and laser head. User-Friendly Design: Convenient power interface with a 5.5-2.5mm DC interface, includes an easy-to-use USB data cable. Supports Windows XP, 7, 8, and 10 operating systems. Item Type: CNC Engraving Machine Control Board Connection: USB (USB CH340) Software: Compatible with GRBL Controller and UniversalGcodeSender Main Control Chip: ATmega328P Spindle Drive Chip: MOSFET (recommended 24V, current within 10A) Spindle PWM Speed Regulation: Supported Support Stepper Motor: 12V, within 1.5A, maximum current recommended less than 2A (compatible with 42 or 57 stepper motors) Laser Engraving: Supported Power Interface: 5.5-2.5mm DC interface Compatible Controllers: GRBL Controller or Candle (3 axes); Laser for Grbl Supported Operating Systems: Windows XP, 7, 8, 10 Laser Support: Up to 12V 5A Spindle Motor Interface: Maximum support 400W DC spindle motor Axes and Tool Control: Supports three axes control, spindle, and laser head Color: Black Material: Plastic Package Contents: 1 x CNC Engraving Machine Control Board 1 x USB Data Cable Note: Light reflection and different displays may cause the color of the item in the picture to slightly differ from the actual product. Measurement may vary by +/- 1-3cm.