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

Specification: Version: V3.0 Size: 68 x 53 x 18mm / 2.67 x 2.08 x 0.7" Voltage: DC 12V to 36V (only DRV8825 driver can handle up to 36V, so please consider voltage for power supply) The V3.0 expansion board can be used as a drive expansion board for engraving machines, 3D printers, etc. There are a total of 4 slots for stepper motor drive modules, which can drive 4 stepper motors, and each stepper motor only needs 2 IO ports, that is to say, 6 IO ports can manage 3 steppers The motor is more convenient to use. PWM Spindle and direction pins,4-Axis support (X, Y, Z , A-Can duplicate X,Y,Z or do a full 4th axis with custom firmware using pins D12 and D13) Experimental phenomenon: The stepper motor reverses one circle, pauses for 1 second, and then rotates forward one circle, and so on. Note that when connecting the A4988 module, do not connect it backwards. The wiring 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 swapping 2A and 2B. Package included: 2*V3 Engraver Shield 3D Printer CNC Expansion Board