A4988 V3 Engraver Drive Shield 3D Printer CNC Drive Expansion Board for Arduino 3D Printer CNC 2pcs

?The expansion board can be used as a driving expansion board for engraving machines, 3D printers, etc., there are a total of 4 slots for stepper motor drive modules IO port, that is to say, 6 IO ports can manage 3 stepper motors very well, it is very convenient to use, bid farewell to the traditional stepper motor cumbersome operation. Experimental phenomenon: The stepper motor reverses one revolution, pauses for 1 second, and then forwards one revolution, and so on. It is worth noting that: When connecting the A4988 module, be careful not to insert it backwards. The wiring method of the stepper motor is: 2A, 2B are a group (red, green), 1A, 1B are a group (blue, yellow). If you want to change the direction, you can change the position of one group, such as 2A, swap with 2B.