Everything You Wanted to Know About Version 3 of the CNC xPRO Controller

Version 3 of the CNC xPRO controller will be available in Matte Black finish (not shown)

The CNC xPRO is already known as a single board stepper motor driver that runs the open source G-code interpreter GRBL. The CNC xPRO features:

4 stepper connections
Full to 1/32 stepping
Options for input and feedback include E-Stop/Reset, Feed Hold, Cycle Start, Homing Location (X,Y,Z Limits), and Z-Probing.
Spindle Direction and PWM Control output
Current limiting adjustments for each axis
Heatsinks installed
Latest stable version of GRBL installed

CNC xPRO V3 further expands the capabilities of the board and simplifies the users experience.

NEW FEATURES (V3)

Redesigned silkscreen (more pictures, less words)
New/Improved FTDI serial USB interface
Auxiliary PC fan header (12/24VDC depending on supply voltage)
100% Input buffering to include limit switches (prevent false triggers)
Motor driver output LEDs
Step/Dir breakout pads to add external drivers
Beefed up overvoltage/reverse voltage protection
Z-probe pin now accessible from screw terminal
Default set to mixed decay (easily changed to slow or fast with jumpers)
E-stop now tied to hardware and software (disables steppers in addition to software E-stop)
Uses the ATmega328PB (new version of the ATmega328, includes more timers, USART, etc)