Grbl是性能高，成本低，基于并口运动控制，用于CNC雕刻。它可以运行在Vanilla Arduino (Duemillanove/Uno) 只要它配备了Atmega 328型芯片。 控制器由C编写并优化，利用了AVR 芯片的每一个灵巧特性来实现精确时序和异步控制。它可以保持超过30kHz的稳定、无偏差的控制脉冲 它接受标准的G代码而且通过了数个CAM工具的输出测试。弧形、圆形和螺旋的运动都可以像其他一些基本G代码命令一样完美支持。函数和变量目前并不支持，但是会作为预处理器包含在将来发布的版本之中。 Grbl 包含完整的前瞻性加速度控制。它意味着控制器将提前16到20个运动来规划运行速度，以实现平稳的加速和无冲击的转弯。(Grbl is high performance, low cost, based on parallel motion control, for CNC engraving. It can run in Vanilla Arduino (Duemillanove/Uno) as long as it is equipped with a Atmega 328 chip. The controller is written and optimized by C and uses every smart feature of the AVR chip to achieve precise timing and asynchronous control. It can maintain a stable, unbiased control pulse over 30kHz, which accepts standard G code and passes the output test of several CAM tools. The motion of arc, round and spiral can be as perfect as other basic G code commands. Functions and variables are not currently supported, but they are included as preprocessors in future releases. Grbl contains complete forward-looking acceleration control. It means that the controller will advance 16 to 20 movements to plan the running speed to achieve smooth acceleration and no impact turn.)