G0 - Rapid positioning G1 - Linear interpolation G2 - Clockwise circular/helical interpolation G3 - Counterclockwise circular/Helical interpolation G4 - Dwell G10 - Coordinate system origin setting G12 - Clockwise circular pocket G13 - Counterclockwise circular pocket G15/G16 - Polar Coordinate moves in G0 and G1 G17 XY - Plane select G18 XZ - plane select G19 YZ - plane select G20/G21 - Inch/Millimetre unit G28 - Return home G28.1 - Reference axes G30 - Return home G31 - Straight probe G40 - Cancel cutter radius compensation G41/G42 - Start cutter radius compensation left/right G43 - Apply tool length offset (plus) G49 - Cancel tool length offset G50 - Reset all scale factors to 1.0 G51 - Set axis data input scale factors G52 - Temporary coordinate system offsets G53 - Move in absolute machine coordinate system G54 to G58 - Use fixture offset 1 - 5 G59 - Use fixture offset 6 / use general fixture number G61/G64 - Exact stop/Constant Velocity mode G68/G69 - Rotate program coordinate system G70/G71 - Inch/Millimetre unit G73 - Canned cycle - peck drilling G80 - Cancel motion mode (including canned cycles) G81 - Canned cycle - drilling G82 - Canned cycle - drilling with dwell G83 - Canned cycle - peck drilling G84 - Canned cycle - right-hand rigid tapping G85/G86/G88/G89 - Canned cycle - boring G90 - Absolute distance mode G91 - Incremental distance mode G92 - Offset coordinates and set parameters G92.x - Cancel G92 etc. This makes it an ideal option for the D.I.Y. This list comes from the Mach3 usage manual in chapter 10 Mach2 G- and M Code Language Reference ( ). Mach3 is a popular Cnc control software that is available for download to use on windows computers. If you are writing your own g-code, Mach3 has an extensive list of g-codes and m-codes which is listed below. Depending on the CAM or CAD (with CAM support), there should be a post processor for Mach3 built-in. Through an importing process called Laz圜am, Mach 3 CNC control software processes a CNC programming language called geometric code (G-code) that tells the CNC machine what type of action to perform. Mach3 is a widely used CNC control software. Mach 3 CNC control software is a platform that turns most windows PCs into a CNC machine controller that manages the motions of motors and generators.

Cnc mach3 program