G code Quick Reference - fra589/grbl-Mega-5X GitHub Wiki

  • G0, G1: Linear Motions

  • G2, G3: Arc and Helical Motions

    • Multiple full circle arcs with G2 and G3 arcs with a P word is not supported.

  • G4: Dwell

  • G10 L2, G10 L20: Set Work Coordinate Offsets

  • G17, G18, G19: Plane Selection

  • G20, G21: Units

  • G28, G30: Go to Pre-Defined Position

  • G28.1, G30.1: Set Pre-Defined Position

  • G38.2, G38.3, G38.4, G38.5: Probing

  • G40: Cutter Radius Compensation Modes OFF (Only)

  • G43.1, G49: Dynamic Tool Length Offsets

  • G53: Move in Absolute Coordinates

  • G54, G55, G56, G57, G58, G59: Work Coordinate Systems

  • G61: Path Control Modes

  • G80: Motion Mode Cancel

  • G90, G91: Distance Modes

  • G91.1: Arc IJK Distance Modes

  • G92: Coordinate Offset

  • G92.1: Clear Coordinate System Offsets

  • G93, G94: Feedrate Modes

  • M0, M2, M30: Program Pause and End

  • M3, M4, M5: Spindle Control

    • Laser mode alters the operation of M3, M4, and spindle speed S word changes. See Laser Mode.

  • M7* , M8, M9: Coolant Control

  • M56* : Parking Motion Override Control

    • Grbl-specific parking motion override control with an M56 command, where M56 P0temporarily disables parking motions and M56/M56 Px with x greater than zero re-enables them.

  • M62, M63, M64, M65: Digital outputs

    (*) denotes commands not enabled in config.h by default.