Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 668)

Milling Fixed Cycles
Chapter 26
26-36
7. At this point, the rotation of the spindle 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 as follows:
G89X__Y__Z__R__P__F__L__;
Where : Is :
X,Y 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 milling fixed cycle is repeated.
(See section 26.3 for a detailed description of these parameters.)
Important: The programmer or operator must start spindle rotation.
(G89): Boring Cycle,
Dwell/Feed Out