GRBL Compatible can be used to in building DIY CNC, Engraving machine etc.,

It can drive four stepper motor using compatible stepstick.

GRBL v1.1 compatible. (Open source firmware that runs on an Arduino UNO that turns G-code commands into stepper signals)

Uses removable Pololu A4988 compatible stepper drivers. (A4988, DRV8825 and others)  

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 A4 and A3)

2 x End stops for each axis (6 in total)  + one Probe

Coolant enable output

Jumpers to set the Micro-Stepping for the stepper drivers. (Some drivers like the DRV8825 can do up to 1/32 micro-stepping ) 

Compact design. 

Stepper Motors can be connected with 4 pin molex connectors or soldered in place. 

Runs on 12-36V DC. 

The DRV8825 stepper motor driver carrier is a breakout board for TI?s DRV8825 microstepping bipolar stepper motor driver. The module has a pinout and interface that are nearly identical to those of our A4988 stepper motor driver board, so it can be used as a higher-performance drop-in replacement for those boards in many applications. The DRV8825 features adjustable current limiting, overcurrent and overtemperature protection, and six microstep resolutions (down to 1/32-step). It operates from 8.2 ? 45 V and can deliver up to approximately 1.5 A per phase without a heat sink or forced air flow (rated for up to 2.2 A per coil with sufficient additional cooling).

· Simple step and direction control interface

· Six different step resolutions: full-step, half-step, 1/4-step, 1/8-step, 1/16-step, and 1/32-step

· Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor?s rated voltage to achieve higher step rates

· 45 V maximum supply voltage

· Built-in regulator (no external logic voltage supply needed)

· Can interface directly with 3.3 V and 5 V systems

· Over-temperature thermal shutdown, over-current shutdown, and under-voltage lockout

· Short-to-ground and shorted-load protection

· 4-layer, 2 oz copper PCB for improved heat dissipation