Grbl is a no-compromise, high performance, motion control firmware for CNC milling. Rabbit GRBL is a fork of the Grbl_Esp32 project, runs on ESP32 processors and it is designed to work properly with SourceRabbit products like Focus - PC Based CNC Control System and the 4-Axis CNC motherboard.

The controller is highly optimized to achieve precise timing and asynchronous operation. It is able to maintain up to 120khZ of stable, jitter free control pulses.

4-Axis CNC Motherboard	4-Axis CNC Motherboard Compact	Focus - PC Based CNC Control System

Find more information on the Wiki https://github.com/SourceRabbit/Rabbit_GRBL/wiki