Carving machine 3D printer expansion board CNC Shield V3 for A4988
The extension board can be used for carving machine and 3D printer driver expansion board, there are 4 slots for stepping
motor driver,it can not into the motor drive 4 road.And every step motor only need two IO interfaces, that is to say, 6pc IO interfaces can be manage three stepper motors well, it's very convenient.
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 you want to change direction, can be change the position of one group , for example 2A, 2B mutually exchanged.
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