Geekcreit UNO R3 With 4pcs A4988 Driver With CNC Shield V3 Expansion Board For3D Printer

Feature This expansion board as a driver expansion board can be used for engraving machines 3D printers It is a total of four slots can drive four A4988 stepper motor Each road stepper motors only need two IO ports In other words six IO ports can be well managed three stepper motors Very convenient to use UNO formodule IO port correspondence introduction Package included 1 x 3D Printer Expansion Board1 x UNO R3 board with USB4 x A4988 driverIO corresponding pin For reference only UNO for expansion board8 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 Par