ALMOCN 3D Printer CNC Shield Expansion Board with 4pcs A4988 Stepstick Stepper Motor Driver Module for 3D Printer

Specification: 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. PWM Spindle and direction pins,4-Axis support (X, Y, Z , A-Can duplicate X,Y,Z or do a full 4th axis with custom firmware using pins D12 and D13) Experimental phenomenon: The stepper motor reverses one circle, pauses for 1 second, and then rotates forward one circle, and so on. A4988 Stepstick Stepper Motor Driver Module: Size: 20 x 15mm / 0.78 x 0.59" Compatible Logic Voltage: 3.3V and 5V Five Step Modes: Full, 1/2, 1/4, 1/8 and 1/16 Low RDS (ON) outputs Automatic current decay mode detection / selection Mixed with slow current decay modes Synchronous rectification for low power dissipation Crossover-current protection Thermal shutdown circuitry Package Include: 1 x CNC Expansion Board 4 x A4988 Stepstick Stepper Motor Driver Module 4 x Heatsink