Fanuc CNC G81 Drilling Cycle Program – Step-by-Step Example

Fanuc G81 drilling cycle is used for simple drilling operations, so here is a cnc program example which demonstrates how G81 drilling cycle can be used.

CNC Program

Fanuc CNC G81 Drilling Cycle Program – Step-by-Step Example

Fanuc G81 Drilling Cycle Example Program

N1 T1 M06
N2 G90 G54 G00 X.3 Y1.2
N3 S1200 M03
N4 G43 H01 Z1. M08
N5 G81 Z-.6 R.1 F10
N6 X1.2 Y.3
N7 G80 G00 Z1. M09
N8 G28 G91 Z0. M05
N9 M30

Explanation

N1- Tool change to tool no.1

N2- Tool rapidly moves to first drilling position X0.3 Y1.2 while taking into account Zero-offset-no. 1

N3- Drill starts rotating clockwise with 1200 rpm.

N4- Drill takes depth Z1. taking into account tool length compensation (G43 H01), coolant is turned on.

N5- Drilling cycle parameters, drill depth and cutting feed are given, with this command first drill is made at current position (X0.3 Y1.2).

N6- As drilling cycle continues it’s work with every axis movement so next drill is done at X1.2 Y0.3

N7- Drilling cycle is canceled with G80 command, Coolant is turned off.

N8- As operation for this component is finished, so cutting tool is taken to reference position, and cutter rotation is stopped.

N9- CNC part-program is ended.

G & M Codes

Code	Description
T	Tool no. used.
M06	Tool change command.
G90	Absolute programming
G54	Zero offset no.1
G00	Rapid traverse
S	Cutter speed
M03	Cutter rotation Clockwise
G43	Tool length compensation.
M08	Coolant on.
G81	Fanuc drilling cycle.
F	Cutting feed.
G80	Canned cycle cancel.
M09	Coolant off.
G28	Return to reference position.
G91	Incremental programming.
M05	Cutter rotation stop.
M30	CNC part-program end with return to program-start.

CNC Milling Example: Mastering the G81 Drilling Canned Cycle Siemens Easy CNC App: Portable SINUMERIK Training Manuals for iPhone & iPad

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