CNC Shiel V3 Engraver Shield Expansion Board: each stepper motor needs only 2 IO ports.
A4988 Driver Expansion Board: suitable for driving 8 v ~ 35 v stepper motor, five different step mode, Only simple step and direction control connector, adjustable potentiometer can adjust the maximum current output, so as to obtain a higher rate of step.
Using A4988 module, be careful not to insert, the stepper motor wiring way is: 2 a, 2 b for a group of (red, green), 1 a and 1 b for a group of (blue, yellow), if you want to change direction, change the location in one group, for example, exchange 2 a with 2 b.
A4988 driver expansion board can be used for engraving machines for 3D printers.

Technical Details

Product Details

Package Dimensions
Width : 5 inch
Height : 1.1 inch
Length : 7 inch

Shipping Weight: 1.6 ounce (View shipping rates and policies)

ASIN : B01N7CH6H2