keyestudio CNC shield V3 is used as driving shield for engraving machines, fully compatible with UNO R3. So you just need to stack it onto UNO R3 control board when using.
It has total 4-way pin slots for stepper motor drive modules (Not Included) to drive 4-channel stepper motors.
Each stepper motor only needs 2 IO ports, so 8 IO ports is enough to manage 4 stepper motors, very easy to use. This shield can make quick work for managing stepper motors in your project.
Note：the three X/Y/Z-axis drive module headers have been connected by default, so just need to plug the modules onto the shield when using. But do not connect the circuit of drive module A, you should connect it to digital ports to control the rotating direction and speed of motor ( A_DIR ; A_STP).
To easily debug the operating mode of stepper motor driver board, there are 3 jumper caps under each pin slots. You can set the working mode by plugging or unplugging the jumper cap.
For example, connect the A4988 to the shield, unplug three jumpers, it is in full-step mode; if plug all the jumpers, it is 16-subdivision working mode.
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