Grbl是一款专为Arduino/AVR328微控制器设计的嵌入式G代码解释器和运动控制器，适用于CNC铣床。它运行在标准的Arduino（Duemillanove/Uno）上，只要搭载了Atmega328芯片即可。Grbl利用AVR芯片的所有巧妙特性实现精确计时和异步操作，能够稳定地维持超过30kHz的无抖动控制脉冲。它支持符合标准的G代码，与多种CAM工具兼容，全面支持圆弧、圆、螺旋运动以及其他基本功能的G代码指令。虽然当前不支持函数和变量，但未来可能以预处理器的形式加入。
Grbl is a no-compromise, high performance, low cost alternative to parallel-port-based motion control for CNC milling. It will run on a vanilla Arduino (Duemillanove/Uno) as long as it sports an Atmega 328.
The controller is written in highly optimized C utilizing every clever feature of the AVR-chips to achieve precise timing and asynchronous operation. It is able to m aintain more than 30kHz of stable, jitter free control pulses.
It accepts standards-compliant G-code and has been tested with the output of several CAM tools with no problems. Arcs, circles and helical motion are fully supported, as well as, other basic functional g-code commands. Functions and variables are not currently supported, but may be included in future releases in a form of a pre-processor.
Grbl includes full acceleration management with look ahead. That means the controller will look up to 18 motions into the future and plan its velocities ahead to deliver smooth acceleration and jerk-free cornering
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