Features: Made of high-quality materials for durability3-axis GRBL 1.1f USB port CNC router engraving machine control board 2418 3018 CNC router control cardAdd shell: mainly for the bare board of the control board, there is a short circuit problem during useIncrease the power button switch (this switch is the power control signal, there is no large current through the switch, don't worry about the size of the switch)Cancel the drive module, integrate imported stepper motor drive, with short circuit protection, no need to worry about module damage. and integrated heat dissipation aluminum alloyAdd fan for forced cooling. Add offline recognition, and insert offline module and computer at the same time. Offline will automatically identify whether there is a computer control. Enhanced spindle drive. A 20,000-rpm spindle can be supported. Support for larger powered spindlesImproved power or: plastic or changed to full metal shield orImproved USB interface: The USB interface is SMD welded, easy to drop due to transportation collision and improper use, and now it is changed to a plug-in, which is very powerfulThe spindle drive increases the optocoupler isolation, so that the control board generates less heat, and the spindle speed regulation is more linear and safer. Stepper motor drive to increase the resettable fuse. When a short circuit or fault occurs, the power is cut off and a fault indicator is displayed. The 12V step-down increases the resettable fuse. When a short circuit occurs, the power supply can be cut off in time to avoid damage. The layout is optimized, the control area is separated from the driving area, and the operation is more stable”Product parameters:Connection: USB (USB-CH340)Software: GRBL Controller, UniversalGcodeSenderInput voltage: 24VDC (12-24VDC)Stepper motor: support 24V 2ASpindle motor: support 24V 10A (support PWM0%-)Main control chip: atmel 328P (nano)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)Light Sculpting: SupportPower interface: 5.5-2.5mm DC interfaceSupport system: win-xp, win7,Package list:1 * GRBL 1.1f 3-axis control board (without handwheel)1 * USB cableNote: 1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2.Please allow slight manual measurement deviation for the data.