grbl
An embedded, high-performance G-code parser and CNC milling controller for Arduino that replaces parallel-port motion control.
What is grbl?
Grbl is an open-source firmware that acts as a high-performance G-code parser and CNC milling controller, designed to run on Arduino boards with Atmega 328 microcontrollers. It solves the problem of expensive parallel-port-based motion control by providing a low-cost, embedded alternative that delivers precise timing and stable control for CNC machines. It interprets standard G-code commands to control milling operations with features like acceleration management and look-ahead planning.
DIY CNC enthusiasts, makers, and professionals building or retrofitting CNC milling machines who need reliable, low-cost motion control firmware. It's also for developers working on embedded systems for precision manufacturing or robotics.
Developers choose Grbl for its no-compromise performance on affordable hardware, offering jitter-free control up to 30kHz and full G-code compliance without the cost of proprietary solutions. Its optimized C code and active community support make it a robust, open-source alternative for CNC motion control.
Overview
An open source, embedded, high performance g-code-parser and CNC milling controller written in optimized C that will run on a straight Arduino
Use Cases
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