h1. Grbl - An embedded g-code interpreter and motion-controller for the Arduino/AVR328 microcontroller h2. The goal: A no-compromise, high performance, low cost alternative to parallel-port based motion control for CNC milling h2. Status: * Ready for production, used regularly for countless CNC jobs * Highly optimized C utilizing the hardware-timers of the AVR-chip for all critical timing * Able to maintain more than 30kHz step rate, generating an ultra clean, jitter free step-signal * Robust G-code interpreter, tested with output from several CAM tools * Standards-compliant g-code arcs/circles fully supported * Buffered, non blocking, asynchronous step generation so the rest of the system is free to process g-code while the steppers are steppin' * Configuration parameters stored in EEPROM and set via simple commands * Full acceleration management with look-ahead ** Smooth acceleration and deceleration lets stepper motors run at higher nominal speeds ** Smooth cornering within the set jerk-limit of your choosing will brake for sharp turns, but keep speed at slight direction changes Prioritized to-do: * Backlash compensation * Autodetect baud rate * Spindle control * Arduino IDE compatible (build and flash) * Support "headless" fabrication by buffering all code to SD-card or similar The project was initially inspired by the Arduino GCode Interpreter by Mike Ellery