Credit card size GRBLHAL controller based on Raspberry Pi RP2040 microcontroller. Standard 5V Parallel port interface. When combined with Mach3 Breakout Board, has the following features: 5 axes of step/direction control 10A Spindle Relay 0-10V Analog spindle speed control 5 opto-coupled inputs One 24V output The PicoBOB can also be used with the Gecko G540 multi-axis step drive. The default GRBLHAL builds for the PicoBOB include the following features that are implemented in the RP2040 port of GRBLHAL: Backlash Compensation. Stress-free Auto-squaring for the ganged axis Ganged axis offsets to correct for offset homing switches Step rates tested up to 180 KHz on 5 simultaneous axes. The PicoBOB is also fully supported via the GRBLHAL web builder:http://svn.io-engineering.com:8080/?driver=RP2040&board=PicoBOB For complete documentation on this OSHW design, see this Github repository:https://github.com/Expatria-Technologies/PicoBOB Mach3 Breakout not included
