Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 635)

Drilling Cycles
Chapter 26
26-9
The format for the G81 cycle is:
G81X__Z__R__F__L__;
Where : Is :
X specifies location of the hole.
Z defines the hole bottom.
R defines the R point level.
F defines the cutting feedrate.
L defines the number of times the drilling cycle is repeated.
See page 26-7 for a detailed description of these parameters.
Important: The programmer or operator must start spindle or live tool
rotation.
Figure 26.4
G81: Drilling Cycle without Dwell
4
2
R Z
3
1
R point level
Initial point
level
Hole bottom
Cutting feed
Rapid feed
( G81): Drilling Cycle, No
Dwell/Rapid Out