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

CNC Shield V3 Engraving Machine Expansion Board】:Compatible A4988 or DRV8825 stepper drivers
⚡【Input Voltage】:12-36V DC
🥇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.
🥈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.
🥉GRBL 0.9 compatible. (Open source firmware that runs on an Arduino UNO that turns G-code commands into stepper signals)