Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 662)

Drilling Cycles
Chapter 26
26-36
6. The boring tool is then retracted at a rapid feedrate to initial point
level, as determined by G98.
7. At this point, the rotation of the spindle or live tool changes to the
clockwise direction.
When the single block function is active, the control stops axis motion
after steps 1, 2 and 5.
The operations in G89 are identical to as those of the G85 boring cycle
with the exception that the control executes a dwell at hole bottom.
The format for the G89 cycle is:
G89X__Z__R__P__F__L__;
Where : Is :
X specifies location of the hole.
Z defines the hole bottom.
R defines the R point level.
P defines the dwell period at hole bottom.
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.
(G89): Boring Cycle,
Dwell/Feed Out