Supported GCodes

Currently Supported G and M Codes

• G0, G1: Linear Motions
• G2, G3: Arc and Helical Motions
• 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 Machine 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
• M6 Tool changing
• M7 , M8, M9: Coolant Control
• M56 : Parking Motion Override Control
• M62, M63, M64, M65 Digital Output Control (Grbl_ESP32 wiki)
• M67 Analog Pin Control

Comments

Gcode comments are supported in the following formats.

• Parentheses. Both internal to the line and at the end
  • G0 (Rapid to start) X1 Y1
  • G0 X1 Y1 (Rapid to start)
• Parentheses with message. If you have MSG, inside the parentheses it will send a Grbl message to all all open interfaces (Serial, Bluetooth Wifi, etc)
  • T4 M6 (MSG, Using tool 4 6mm end mill) ... This will display [MSG: Using tool 4 6mm end mill]
• Semicolon. These are for comments at the end
  • M30 ; End of program.