Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 660)

Milling Fixed Cycles
Chapter 26
26-28
The format for the G85 cycle is as follows:
G85X__Y__Z__R__F__L__;
Where : Is :
X,Y 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 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 26.12
G85: Boring Cycle (Without Dwell, Feed Out)
Cutting feed
Rapid feed
Initial point
level
R point level
Hole bottom
1
2
3
4
5
In the G85 right-hand tapping cycle, the control moves the axes in the
following manner:
1. The tool rapids to initial point level the hole location.
2. The boring tool then rapids to the R point level, slows to the
programmed cutting feedrate and begins the boring operation.
3. The boring tool continues to drill at the programmed feedrate until it
reaches the depth of the hole as programmed with the Z--word.
(G85): Boring Cycle, No
Dwell/Feed Out