Description 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 ri-sk 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. Perfect for any 42 or 57 stepper motor. Spindle and Laser Support: Equipped to support 400W DC spindle motors and la-sers, providing comprehensive control for three axes, spindle, and la-ser head.User-Friendly Design: Convenient power interface with a 5.5-2.5mm DC interface, easy-to-use USB data cable included. Supports Win- XP, 7, 8, 10 operating systems. AUTOMATICALLY IDENTIFY WITH OPTOCOUPLER ISOLATION: Add offline recognition, can insert offline module and computer at the same time. Offline will automatically identify whether there is computer control. The spindle drive increases the optocoupler isolation, so that the control board generates less heat, and the spindle speed regulation is more linear and IMPROVED USB INTERFACE: The USB interface is patch welding, easy to drop due to transportation collision and improper use, and now it is changed to a plug in, very powerful Item Type: CNC Engraving Machine Control Board Connection: USB (USB CH340) Software: For GRBL Controller, for UniversalGcodeSender Main Control Chip: For 328P Spindle Drive Chip: For MOSFET (recommended 24V, current within 10A) Spindle PWM Speed Regulation: Support Support Stepper Motor: 12V,within 1.5A, it is recommended that the maximum current be less than 2A, and heating. (any stepper motor 42, 57) Laser Engraving: Support Power Interface: 5.5-2.5mm DC interface Supports: For GRBL Contol or Candle (3 axes); Laser for Grbl Support System: For Windows XP 7 8 10 Support Laser: 12V 5A maximum Spindle Motor Interface: Maximum support 400W DC spindle motor Support three axes control, spindle, laser head Colour:black Material:plastic Package Contents: 1 x CNC Engraving Machine Control Board 1 x USB Data Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.