Our 4-Axis CNC Motherboard is preloaded with RabbitGRBL, a 32-bit version of the Grbl firmware build for the ESP32 cpu.
RabbitGRBL is a no-compromise, high performance, motion control for CNC milling machines. Our 32-bit version of the Grbl firmware runs on ESP32 processors and it is designed to work properly with our products like Focus - PC Based CNC Control System and the 4-Axis CNC motherboard. The firmware is highly optimized to achieve precise timing and asynchronous operation. It is able to maintain up to 120khZ of stable, jitter free control pulses.
RabbitGRBL is open source, under the GNU General Public License and the source code is available on our GitHub repository at https://github.com/SourceRabbit/RabbitGRBL