Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 631)

Irregular Pocket Milling Cycles
Chapter 25
25-13
The finish pass ends at a point along the start-wall that is determined by
the angle formed by the start-wall and a line drawn from the endpoint of
the start-wall to the start-point. An example of this is shown in the
following figure. From this point the cutter is moved back to the
start-point of the cycle.
Figure 25.7
Irregular Pocket Finishing Cycle Exit Moves
SIDE
VIEW
Initial Z level (top of pocket)
Y
X
H
Z
X
Z
(Incremental)
Z
(Absolute)
Start/end corner
TOP
VIEW
Start-point
I
J K
E
F G
H I
J
K Will leave H finish
allowance if programmed
in the G89.2 block