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Frequently Asked Questions

yurkomik edited this page Mar 18, 2012 · 21 revisions

Please feel free to contribute more up-to-date answers or questions!

Compiling Grbl

Where can I download a pre-compiled Grbl HEX file to flash onto my Arduino?

The pre-compiled Grbl HEX files are located in the Downloads tab on the main front page.

Flashing Grbl

Does grbl overwrite the Arduino bootloader?

No, grbl fits on the ATmega328P without having to overwrite the bootloader; you will still be able to upload Arduino sketches after flashing without having to re-burn the bootloader.

Connecting Grbl

Supported g-codes

on v0.7 master:

Linear Motions (G0,G1), Arc Motions (G2,G3), Dwell (G4), Plane Selection (G17,G18,G19), Units (G20,G21), Homing* (G28,G30), Distance Modes (G90,G91), Feedrate Modes (G93,G94), Coordinate Offset (G92), Spindle Control (M3,M4,M5), and Others (G53,G80).