G Code and M Code

First of all the question is what is G and M Code? What is the use of it? How to use of it?

The machines Computer Numeric Control is called CNC Machine in short. These machines are operated by the G code and M code. CNC machine used to cutting the metal in various shape by making a program of G and M code. The momentum and motion are defined the G code and the action taken by the machine is done by M code. Here I am talking about 3 axis milling and here are some G and M code of it. These are basic ISO standard generic code which are mostly based on Fanuc, Haas, Mitshubishi Controller

G CODE

CODE	Function
G00	Rapid move in straight line
G01	Move in straight line by given feed rate
G02	Move in Clockwise Circular arc in given feed rate
G03	Move in Counter Clockwise Circular arc in given feed rate
G04	Stop for a specified time. Dwell time
G10	Programmable parameter input
G15	Polar Coordinates OFF, return to Cartesian Coordinates
G16	Polar Coordinates ON
G17	X-Y plane selection
G18	X-Z plane selection
G19	Y-Z plane selection
G20	Program coordinates are in inches
G21	Program coordinates are in mm
G27	Reference point return
G28	Return to home position
G29	Return from the reference position
G30	Return to the 2nd, 3rd, and 4th reference point
G32	Constant lead threading
G40	cutter compensation off
G41	cutter compensation (LEFT)
G42	Tool cutter compensation (RIGHT)
G43	length compensation plus
G44	length compensation Minus
G49	length compensation cancel
G50	Reset all scale factors to 1.0
G51	scale factors on
G52	Local workshift for all coordinate systems
G53	Cancel work offsets
G54	1st Work coordinate system
G55	2nd Work coordinate system
G56	3rd Work coordinate system
G57	4th Work coordinate system
G58	5th Work coordinate system
G59	6th Work coordinate system
G61	Check mode Exact stop
G62	Corner override Auto
G63	Tapping mode
G64	Best speed path(Not used in Mitshubishi)
G65	Custom macro simple call
G68	Rotation of Coordinate System
G69	Coordinate System Rotation Cancel
G73	Drilling cycle (small retract)
G74	Left hand tapping cycle
G76	Fine boring cyle
G80	Cancel canned cycle
G81	Drilling cycle
G82	Drilling cycle with dwell
G83	Peck drilling cycle (retract up to set)
G84	Tapping cycle
G85	Boring canned cycle, no dwell
G86	Boring canned cycle, spindle stop, rapid out
G87	canned cycle Back boring
G88	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 (B and C systems)
G91	Incremental programming of XYZ (B and C systems)
G91.1	Incremental programming IJK (type B and C systems)
G92	Offset coordinate system and save parameters
G92	Clamp of maximum spindle speed
G92.1	Cancel offset and zero parameters
G92.2	Cancel offset and retain parameters
G92.3	Offset coordinate system with saved parameters
G94	Units per minute feed mode. Units in inches or mm.
G95	Units per revolution feed mode. Units in inches or mm.
G96	Constant surface speed
G97	Cancel constant surface speed
G98	Return to initial Z plane after canned cycle
G99	Return to initial R plane after canned cycle

M CODE

CODE	Function
M01	Optional Stop
M02	Program End
M03	Spindle ON Clockwise
M04	Spindle On Counter Clockwise
M05	Spindle Stop
M06	Tool Change
M07	Coolant On Mist.
M08	Coolant On Flood
M09	Coolant OFF
M29	Rigid Tapping Mode

In next post i will come with some example of G Code and M Code Program with simulation.