Feature:1. OFFLINE LASER ENGRAVING: Adopt for GRBL1.1f firmware, possess stable performance. With optional offline module, realize offline tool setting and engraving. Laser directly into the picture for engraving, no programming, no design, simple and convenient2. ADJUSTABLE POWER: The laser supports PWM or TTL signal control, and the power is adjustable from 0-100%. Spindle supports PWM power 0-100% adjustable. Enhanced spindle drive can support 20000rpm spindle3. STABLE OVERCURRENT PROTECTION: Provide stepper motor overcurrent protection to avoid damage, upgrade integrated stepper motor drive, 2A high current with high stability. Added power button switch4. GOOD HEAT DISSIPATION: Professional shell protection, the fan actively dissipates heat, and does not heat up for a long time. Increase the fan port for forced heat dissipation, increase the shell to protect the control board during transportation, and avoid short circuit problems during use5. SHORT CIRCUIT PROTECTION FUNCTION: Cancel the drive module, use an integrated imported stepping motor drive, with short circuit protection, integrated heat dissipation aluminum alloy6. 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 safer7. IMPROVED USB INTERFACE: The original 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 powerfulSpecification:Item Type: CNC Engraving Machine Control BoardConnection: USB (USB CH340)Software: For GRBL Controller, for UniversalGcodeSenderMain Control Chip: For Atmel 328PSpindle Drive Chip: For MOSFET (recommended 24V, current within 10A)Spindle PWM Speed Regulation: SupportSupport 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: SupportPower Interface: 5.5-2.5mm DC interfaceSupports: For GRBL Contol or Candle (3 axes); Laser for GrblSupport System: For Windows XP 7 8 10Support Laser: 12V 5A maximumSpindle Motor Interface: Maximum support 400W DC spindle motorSupport XYZ three axes control, spindle, laser head.Package List:1 x CNC Engraving Machine Control Board1 x USB Data Cable