Programming Chapter Three Commands and Functions
108
N0030 G00 X83
；
X infeeds and approaches the workpiece
N0040 G71 X0 I4 K2.5 L7 F60
；
define parameters of roughing cycle
N0050 G01 Z145
；
N0060 X15
；
N0070 W-30
；
N0080 G02 X55 W-20 I0 K-20
；
N0090 G01 W-25
；
N0100 G01 X80 W-20
；
N0110 W-50
；
N0120 G00 X115 Z155
；
return to the starting point of tool
N0130 M5
；
stop the spindle
N0140 M9
；
cooling OFF
N0150 M2
；
end of program
3.1.14.2 G72
—
End Face Roughing Cycle
Command format
：
G72 Z (W) I K L F
；
Z
（
W
）
—Z starting point coordinate of finish machining.
I—Z cuts feed once
；
K—Z retracts once
；
L—block amount of the final path(without itself).Range: 1-99;
F—feedrate.
I
K
Z ( W )
C u t t in g f e e d
R a p id t r a v e r s e
Fig. 28 G72 face roughing compound cycle
Cycle process:
1. rapidly feeds the distance I.
2. X cuts feed and its end point being defined automatically by the system.
3. Z retracts the distance K at F speed.
4. X rapidly retracts to the starting point.
5. Z feeds the distance I+K.
6. Z feeds to the specified position by repeating the above steps
②
— .
⑤
7. Execute the final path to finish its machining.
Note 1:
The tool in parallel with X feeds with G72.
Note 2:
The dimension must be only increased or reduced in the block used for executing the
Define the final path
（
N0050-N0110
）
