Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 625)

Irregular Pocket Milling Cycles
Chapter 25
25-7
Figure 25.4
Roughing-Out Non-Adjacent Areas in an Irregular Pocket
Start/end corner
Initial Z level (top of pocket)
L
Z
(incremental)
Z
(absolute)
SIDE
VIEW
TOP
VIEW
N
O P
N/O
Q
R
T U X
No undone cutting to
do in this area
T U
X
e
Y
X
Y
X
H
H
P/Q/R
S V
W
Once the current plunge-level has been machined-out , the cutter is moved
back to the start-point. The control raises cutter to the initial Z level then
moves it to the start-point.
If the programmed Z depth of the pocket has not been reached, another
plunge along the Z axis to the next L level takes place. This level is then
machined as described in the previous paragraphs. This process is repeated
until the programmed Z depth is reached.