Pdf ((full)) | Grbl G Code Commands List

These are the bread-and-butter commands that tell your machine how to move. In GRBL, motion commands are modal, meaning once a command is set (like G1), it stays active until changed or canceled.

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| Command | Description | |---------|-------------| | M0 | Program pause (press resume to continue) | | M1 | Optional pause (if enabled) | | M2 | Program end (same as M30) | | M30 | Program end, rewind to start | | G28 | Go to home position (stored zero) | | G28.1 | Set current position as home reference | | G30 | Go to pre-defined secondary home | | G30.1 | Set current position as secondary home | | G53 | Move in machine coordinates (ignores offsets) | | G92 | Set position offset (temporary coordinate shift) | | G92.1 | Clear G92 offsets | | G92.2 | Suspend G92 offsets | | G92.3 | Resume G92 offsets | These are the bread-and-butter commands that tell your

Before diving into the lists, it is important to understand what GRBL actually does. GRBL is a high-performance, interpreter firmware for microcontrollers (typically the Arduino Uno, Nano, or ESP32). It takes standard G-code inputs via a serial connection and translates them into precise electrical pulses that drive your stepper motor drivers. GRBL is a high-performance