Feature:1. OFFLINE laser engraving: adopt GRBL1.1f firmware, have stable performance. With the optional offline module, realize the settings and engraving of offline tools. Laser directly on the image for engraving, no programming, no design, simple and convenient 2. ADJUSTABLE POWER: The laser supports PWM or TTL signal control, and the power can be adjusted in the range of 0-100%. The spindle supports PWM power adjustment 0-100%. The improved spindle drive can support a spindle with a speed of 20000 rpm. Display Built-in 3. STABLE ANTI-CURRENT PROTECTION: Provide stepper motor overcurrent protection to avoid damage, update the integrated stepper motor drive, high current 2A with high stability. Added power button switch 4. GOOD HEAT DISSIPATION: Professional coating 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 housing to protect the control board during transportation, and avoid short circuit problems during use 5. SHORT CIRCUIT PROTECTION FUNCTION: Cancel the drive module, use the integrated imported stepper motor drive, with short circuit protection, aluminum alloy integrated heat dissipation 6. AUTOMATIC IDENTIFICATION WITH OPTOKOUPLER ISOLATION: Add offline recognition, you can insert offline module and computer at the same time. Offline will automatically determine if there is a computer control. Spindle drive increases optocoupler insulation, so that the control board generates less heat, and spindle speed adjustment is more linear and safer 7. IMPROVED USB INTERFACE: the original USB interface is patch welding, easy to drop due to transport collision and improper use, and now it is changed to plug, very strong . Engraving machine control board CNC 3 axes . Engraving machine control board CNC 3 axes Specification: Item type: CNC engraving machine control board Connection: USB (USB CH340) Software: for GRBL controller, for UniversalGcodeSender Main control system: for Atmel 328P Spindle drive system: for MOSFET (recommended 24 V, current within 10A) Spindle PWM speed control: support Stepper motor support: 12V, within 1,5a, it is recommended that the maximum current is less than 2a and heating. (any stepper motor 42, 57) Laser Engraving: Support Power Interface: DC 5,5-2,5 mm Interface Supports: For GRBL Contol or Candle (3 axes); Laser for Grbl Support system: for Windows XP 7 8 10 Auxiliary laser: up to 12 V 5 A Spindle motor interface: maximum support for 400W DC spindle motor Support three axis control XYZ, spindle, laser head . Engraving machine control board CNC 3 axes . Engraving machine control board CNC 3 axes Package List:1 x Engraving Machine Control Board CNC 1 x USB data cable . Engraving machine control board CNC 3 axes . Engraving machine control board CNC 3 axes