Cnc Codes

Front 1

G77

Back 1

Rough Turning

Front 2

G79

Back 2

Rough Facing

Front 3

G32

Back 3

Threading

Front 4

G00

Back 4

Rapid

Front 5

G01

Back 5

Linear Interpolate

Front 6

G02

Back 6

Clockwise arc

Front 7

G03

Back 7

Counterclockwise Arc

Front 8

G04

Back 8

Dwell

Front 9

G20

Back 9

Inch

Front 10

G21

Back 10

Metric

Front 11

G32

Back 11

Simple Thread

Front 12

G70

Back 12

Finishing cycle

Front 13

G72 (cnc workshop, cnc ez)

Back 13

Rough Facing

Front 14

G90

Back 14

Absolute Positioning

Front 15

G91

Back 15

Incremental Positioning

Front 16

M02

Back 16

Program End

Front 17

M03

Back 17

Spindle on cw

Front 18

M04

Back 18

spindle on ccw

Front 19

M05

Back 19

Spindle stop

Front 20

M30

Back 20

End of program

Front 21

Lathe Operations

Back 21

Turn, Bore, Thread, Face, Part

Front 22

Turn

Back 22

Remove material from O.D. of stock

Front 23

Bore

Back 23

Remove material from I.D. of stock

Front 24

Thread

Back 24

Cut threads on O.D. or I.D. of stock via G32

Front 25

Face

Back 25

Remove material from face of part to create smooth finish

Front 26

Part

Back 26

Cut through stock to remove part.

Front 27

Depth of cut

Back 27

Measurement on the radius of the part. D-code

Front 28

Spindle Speed

Back 28

Relates to spindle which holds the part. Usually measured in rpm. S-code

Front 29

Feed rate

Back 29

Rate in which the tool moves along the x or z axis. Usually measured in (in/rev)

Front 30

N

Back 30

Block Number

Front 31

G

Back 31

Prep function, usually relates to tooling moves

Front 32

X

Back 32

Designate coordinate in X axis

Front 33

Z

Back 33

Designate coordinate in Z axis

Front 34

Q

Back 34

Block end, used in cycle commands to specify end of cycle

Front 35

F

Back 35

Assign feedrate

Front 36

S

Back 36

Assign spindle speed

Front 37

T

Back 37

Assign tool

Front 38

D

Back 38

Assign depth of cut, usually used in cycle commands

Front 39

M

Back 39

Miscellaneous code, relates to spindle function or auxilary code.

Front 40

P

Back 40

Start block

Front 41

U

Back 41

Amount of stock left for finishing X

Front 42

W

Back 42

Amount of stock left for finishing Z

Front 43

Rough Cut

Back 43

G71 P_ Q_ U_ W_ D_ F_

Front 44

Finish Cut

Back 44

G70 P_ Q_

Front 45

Mill v turn

Back 45

Fixturing
Cutting Tool
Coordinate System
PRZ

Front 46

M v T cont
Fixturing

Back 46

Mill: Stationary workpiece
Turn: Chuck, work-piece rotates

Front 47

M v T cont
Cutting Tool

Back 47

Mill: Multi point tools, Face mil
Turn: Single point tools

Front 48

M v T cont
Coordinate system

Back 48

Mill: XYZ standard with 4 and 5 often added
Turn: X & Z

Front 49

M v T cont
PRZ

Back 49

Mill: Lower right hand corner and top of work piece
Turn: Center of face.