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Pssst! Hey, if you're here looking up g-codes, maybe you'd like to find an easier way. What could be better than software that tells you exactly what each g-code does in plain English?
That's what G-Wizard Editor is like.
GCode is complicated. G-Wizard Editor makes it easy.
A list of g-codes and m-codes for milling in the Fanuc, LinuxCNC, GRBL, and Haas dialects. We give a quick definition of each g-code along with a link to tutorials and examples of how to use it. Click the g-code link (if any) to visit a tutorial from our popuplar Online Free G-Code Training that shows examples and teaches how to program the g-code.
Function | Notes | ||
G00 | Move in a straight line at rapids speed. | XYZ of endpoint | |
G01 | Motion | Move in a straight line at last speed commanded by a (F)eedrate | XYZ of endpoint |
G02 | Clockwise circular arc at (F)eedrate | XYZ of endpoint IJK relative to center R for radius | |
G03 | Motion | Counter-clockwise circular arc at (F)eedrate | XYZ of endpoint IJK relative to center R for radius |
G04 | Dwell: Stop for a specified time. | P for milliseconds X for seconds | |
G05 | Motion | FADAL Non-Modal Rapids | |
G09 | Exact stop check | ||
G10 | Compensation | Programmable parameter input | |
G15 | Turn Polar Coordinates OFF, return to Cartesian Coordinates | ||
G16 | Coordinate | Turn Polar Coordinates ON | |
G17 | Select X-Y plane | ||
G18 | Coordinate | Select X-Z plane | |
G19 | Select Y-Z plane | ||
G20 | Coordinate | Program coordinates are inches | |
G21 | Program coordinates are mm | ||
G27 | Motion | Reference point return check | |
G28 | Return to home position | ||
G29 | Motion | Return from the reference position | |
G30 | Return to the 2nd, 3rd, and 4th reference point | ||
G32 | Canned | Constant lead threading (like G01 synchronized with spindle) | |
G40 | Tool cutter compensation off (radius comp.) | ||
G41 | Compensation | Tool cutter compensation left (radius comp.) | |
G42 | Tool cutter compensation right (radius comp.) | ||
G43 | Compensation | Apply tool length compensation (plus) | |
G44 | Apply tool length compensation (minus) | ||
G49 | Compensation | Tool length compensation cancel | |
G50 | Reset all scale factors to 1.0 | ||
G51 | Compensation | Turn on scale factors | |
G52 | Local workshift for all coordinate systems: add XYZ offsets | ||
G53 | Machine coordinate system (cancel work offsets) | ||
G54 | Work coordinate system (1st Workpiece) | ||
G55 | Work coordinate system (2nd Workpiece) | ||
G56 | Work coordinate system (3rd Workpiece) | ||
G57 | Work coordinate system (4th Workpiece) | ||
G58 | Work coordinate system (5th Workpiece) | ||
G59 | Work coordinate system (6th Workpiece) | ||
G61 | Other | Exact stop check mode | |
G62 | Automatic corner override | ||
G63 | Other | Tapping mode | |
G64 | Best speed path | ||
G65 | Other | Custom macro simple call | |
G68 | Coordinate System Rotation | ||
G69 | Coordinate | Cancel Coordinate System Rotation | |
G73 | High speed drilling cycle (small retract) | ||
G74 | Canned | Left hand tapping cycle | |
G76 | Fine boring cyle | ||
G80 | Canned | Cancel canned cycle | |
G81 | Simple drilling cycle | ||
G82 | Canned | Drilling cycle with dwell (counterboring) | |
G83 | Peck drilling cycle (full retract) | ||
G84 | Canned | Tapping cycle | |
G85 | Boring canned cycle, no dwell, feed out | ||
G86 | Canned | Boring canned cycle, spindle stop, rapid out | |
G87 | Back boring canned cycle | ||
G88 | Canned | Boring canned cycle, spindle stop, manual out | |
G89 | Boring canned cycle, dwell, feed out | ||
G90 | Absolute programming of XYZ (type B and C systems) | ||
G90.1 | Absolute programming IJK (type B and C systems) | ||
G91 | Incremental programming of XYZ (type B and C systems) | ||
G91.1 | Incremental programming IJK (type B and C systems) | ||
G92 | Offset coordinate system and save parameters | ||
G92 (alternate) | Motion | Clamp of maximum spindle speed | S |
G92.1 | Cancel offset and zero parameters | ||
G92.2 | Cancel offset and retain parameters | ||
G92.3 | Offset coordinate system with saved parameters | ||
G94 | Motion | Units per minute feed mode. Units in inches or mm. | |
G95 | Units per revolution feed mode. Units in inches or mm. | ||
G96 | Motion | Constant surface speed | |
G97 | Cancel constant surface speed | ||
G98 | Canned | Return to initial Z plane after canned cycle | |
G99 | Return to initial R plane after canned cycle |
![5 Axis Machining G Code Sample 5 Axis Machining G Code Sample](/uploads/1/2/4/9/124985966/713540661.gif)
![Machining Machining](/uploads/1/2/4/9/124985966/175906784.jpg)
Function | Notes | |
M00 | Program Stop (non-optional) | |
M01 | M-Code | Optional Stop: Operator Selected to Enable |
M02 | End of Program | |
M03 | M-Code | Spindle ON (CW Rotation) |
M04 | Spindle ON (CCW Rotation) | |
M05 | M-Code | Spindle Stop |
M06 | Tool Change | |
M07 | M-Code | Mist Coolant ON |
M08 | Flood Coolant ON | |
M09 | M-Code | Coolant OFF |
M17 | FADAL subroutine return | |
M29 | M-Code | Rigid Tapping Mode on Fanuc Controls |
M30 | End of Program, Rewind and Reset Modes | |
M97 | M-Code | Haas-Style Subprogram Call |
M98 | Subprogram Call | |
M99 | M-Code | Return from Subprogram |
If you’re a CNC Beginnner, check out our CNC Beginner’s Cookbook. It’ll get you up to speed with a solid CNC foundation fast.
We also have Cookbooks for Feeds and Speeds, G-Code Programming, CNC Manufacturing and Shop Management, DIY CNC, and don’t forget the CNC Cookbook Blog–with over 4 million visitors a year it’s the most popular CNC blog by far on the web.
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