3d printer parts expension board Arduino CNC Shield

Specification:

This is a driver expansion board, can be used for engraving machines, 3D printers
It has 4 slots, can drive four A4988 stepper motor. Each channel stepper motors only need two IO ports.

Note:
When inserting the A4988 module, must be careful not to insert opposite. 
Stepper motor wiring as follows:2A, 2B is a group (red, green), 1A, 1B is a group (blue, yellow), if want to change direction, can be change the position of one group , for example 2A, 2B mutually exchanged.

Further information, please feel free to contact us at sales@lankeda.com  
Or visit our website: www.3dprint.en.alibaba.com  and www.lankeda.com