Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 662)

Milling Fixed Cycles
Chapter 26
26-30
The format for the G86 cycle is as follows:
G86X__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.
Figure 26.13
G86: Boring Cycle, Spindle Stop/Rapid Out
Cutting feed
Rapid feed
Spindle begins
rotation at the
R point level
Spindle stops at
hole bottom Hole bottom
R point level
Initial point
level
1
2
3
4
5
6
(G86): Boring Cycle,
Spindle Stop/Rapid Out