Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 632)

Irregular Pocket Milling Cycles
Chapter 25
25-14
CAUTION: The cutter must be able to move from the
end-point of the P block to the start-point (I through K in
Figure 25.7) without cutting into any wall of the pocket.
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
finished as described in the previous paragraphs. This process is repeated
until the programmed Z depth is reached.
Once the programmed depth is reached, the control simultaneously raises
the cutter and moves it towards the start-point. The control shuts off cutter
compensation prior to reaching the start-point (J and K in Figure 25.7).
This completes the irregular pocket finishing cycle.
END OF CHAPTER