FANUC CNC Programming: Key G‑Codes and Axis Functions

N

Used at the beginning of line to designate the line number. Ex. N_ (1-4 digits)

EOB

End of Block - A () goes at the end of each line when using a FANUC OT controller.

%

Goes at the beginning and end of a program so the controller knows where the program starts and ends.

()

Used to place notes in the program. Controller does not read anything in parentheses.

O

Goes at the beginning of the program on the first line after the %; gives the program its name Ex- O0001.

r

Radius used on a G02 or G03 line to give the amount of radius.

X, Y, and Z

The 3 axes used in simple programming.

T

Tool number in programming the Haas machines. MO6 is not included with the tool change; instead, tools are called up by T101, T202, T303, etc.

S

Spindle speed.

F

Feed rate; inches per revolution for the lathe, inches per minute for the mill.

D

Depth of cut used in a G71 cycle.

U

Amount of material left in the 'X' direction in a G71 cycle.

W

Amount of material left in the 'Z' direction in a G71 cycle.

P

Line where the profile begins on a G70 and G71 cycle.

Q

Line where the profile ends on a G70 and G71 cycle.

Modal codes

Codes that stay active until they are deactivated.

Non-modal codes

Codes that are only active for one-time use.