CNC Expansion Board:

Version: V3.0

Size: 68 x 53 x 18mm / 2.67 x 2.08 x 0.7"

Voltage: DC 12V to 36V (only DRV8825 driver can handle up to 36V, so please consider voltage for power supply)

The V3.0 expansion board can be used as a drive expansion board for engraving machines, 3D printers, etc. There are a total of 4 slots for stepper motor drive modules, which can drive 4 stepper motors, and each stepper motor only needs 2 IO ports, that is to say, 6 IO ports can manage 3 steppers The motor is more convenient to use.

Experimental phenomenon: The stepper motor reverses one circle, pauses for 1 second, and then rotates forward one circle, and so on.

Note that when connecting the A4988 module, do not connect it backwards. The wiring of the stepper motor is: 2A, 2B are a group (red, green); 1A, 1B are a group (blue, yellow). If you want to change the direction, you can change the position of one group, such as swapping 2A and 2B.

This expansion board can be used as a driver expansion board for engraving machines, 3D printers, etc. It has a total of 4 slots for stepper motor driver modules.

(Note that this board does not include the A4988 stepper motor driver module. You can purchase it separately in our store if needed) , can drive 4 non-stepping motors, and each stepper motor only requires 2 IO ports. In other words, 6 IO ports can manage 3 stepper motors very well, and it is very convenient to use. Farewell Traditional stepper motors are cumbersome to operate.

4pcs A4988 Driver:

Low RDS (on) output

Automatic current decay mode detection/selection

Mixed and slow current decay modes

Synchronous rectification for low power dissipation

Internal UVLO

Cross current protection

3.3 and 5 V compatible logic supplies

Overheating shutdown circuit

Ground short circuit protection

Loaded short circuit protection

Five selectable stepping modes: full, 1/2, 1/4, 1/8 and 1/16

Warning: Connecting or disconnecting stepping motor while driver is powered on might damage driver.