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

Description

This expansion board as a driver expansion board, can be used for engraving machines, 3D printers.
nIt 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.
nUNO for Arduino module IO port correspondence introduction.
n
nUNO for Arduino———————- expansion board
n8 ———————— EN ( stepper motor driver enable , active low )
n7 ———————– Z.DIR (Z -axis direction control )
n6 ———————– Y.DIR (Y -axis direction control )
n5 ———————– X.DIR (X -axis direction control )
n4 ———————- Z.STEP (Z -axis stepper control )
n3 ———————- Y.STEP (Y -axis stepper control )
n2 ———————- X.STEP (X -axis stepper control )