V3 Engraver 3D Printer CNC Shield Expansion Board A4988 Driver for Arduino

V3 3D Printer A75 CNC Shield A4988 Driver Expansion Board For Arduino 100% brand new High quality. Description: This extension board can be used for carving machine, 3D printer driver expansion board, there are total 4 way to step motor driver module slot, but can not into the motor drive 4 road, and every step motor only need two IO mouth, that is to say, 6 IO mouth can be very good manage three stepper motor, use very convenient, bid farewell to the traditional stepper motor operation trival Features: Product: CNC Shield V3 Driver Expansion

Board Dimension(LxW): approx. 2.6"x2"

Material: PCB board/copper Weight: 34 g

UNO for Arduino---------------------- expansion board 8 ------------------------ EN ( stepper motor driver enable , active low ) 7 ----------------------- Z.DIR (Z -axis direction control ) 6 ----------------------- Y.DIR (Y -axis direction control ) 5 ----------------------- X.DIR (X -axis direction control ) 4 ---------------------- Z.STEP (Z -axis stepper control ) 3 ---------------------- Y.STEP (Y -axis stepper control ) 2 ---------------------- X.STEP (X -axis stepper control ) / / The following is a simple stepper motor control procedures, # define EN 8 / / stepper motor enable , active low # define X_DIR 5 / / X -axis stepper motor direction control # define Y_DIR 6 / / y -axis stepper motor direction control # define Z_DIR 7 / / z axis stepper motor direction control # define X_STP 2 / / x -axis stepper control # define Y_STP 3 / / y -axis stepper control # define Z_STP 4 / / z -axis stepper control / * / / Function : step . function: to control the direction of the stepper motor , the number of steps . / / Parameters : dir direction control , dirPin corresponding stepper motor DIR pin , stepperPin corresponding stepper motor " step " pin , Step number of step of no return value. * / void step (boolean dir, byte dirPin, byte stepperPin, int steps) { digitalWrite (dirPin, dir); delay (50); for (int i = 0; i