USB port cnc engraving machine control board

• Connection: USB (USB-CH340)
• Software: GRBL controller, UniversalGcodeSender
• Master chip: atmel 328P (arduino nano)
• Stepper motor driver: A4988
• Spindle drive chip: MOSFET, the highest 60V (recommendation within 48V, current :within 10A )
• Support stepper motor: 12V, maximum current of 2A or less is recommended within 1.5A and additional heat. (Any stepper motor 42, 57)