G Codes:
G-Code or preparatory code or function, are functions in the Numerical control programming language. The G-codes are the codes that position the tool and do the actual work, as opposed to M-codes, that manages the machine.
T for tool-related codes
S and F are tool-Speed and tool-Feed,
D-codes for tool compensation
M codes:
M codes control the overall machine, causing it to stop, start, and turn on coolant, etc. whereas other codes pertain to the path traversed by cutting tools. Different machine tools may use the same code to perform different functions; even machines that use the same CNC control.
Partial list of M-Codes:
M00=Program Stop (non-optional)
M01=Optional Stop, machine will only stop if operator selects this option
M02=End of Program
M03=Spindle on (CW rotation)
M04=Spindle on (CCW rotation)
M05=Spindle Stop
M06=Tool Change
M07=Coolant on (flood)
M08=Coolant on (mist)
M09=Coolant off
M10=Pallet clamp on
M11=Pallet clamp off
M19=Spindle orientation
M30=End of program/rewind tape (may still be required for older CNC machines)
G00 Code:
G00 code is a rapid tool move that is used when moving tool in a linear motion from position to position without cutting any material.
G01 code:
The G01 code is a straight line feed move in a combination of X, Y or Z axis. It’s used specifically for the linear removal of material from a work piece.
PROGRAM:
The following example is done by using G00 and G01 codes
Program:
N01 G90 G20
N02 M06 T05 M03 S1200
N03 G00 X0 Y0 Z2
N04 G00 X10 Y10
N05 G01 Z-2.5 F200
N06 G01 X30 Y10
N07 G01 X30 Y30
N08 G01 X25 Y30
N09 G01 X25 Y15
N10 G01 X15 Y15
N11 G01 X15 Y30
N12 G01 X10 Y30
N13 G01 X10 Y10
N14 G00 Z2
N15 G00X0 Y0
N16 M05 M30
