Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 619)

Chapter
25
25-1
Irregular Pocket Milling Cycles
Important: The Irregular Pocket Milling Cycles feature (G89.1 and
G89.2) is only available prior to release 12.xx. Any attempt to program a
G89.1 or G89.2 in release 12.xx or later will result in the error message,
“Illegal G--code”.
This chapter describes how to use G89.1 and G89.2 to program irregular
pocket milling cycles. Use this table to find information:
Information on: On page:
Irregular Pocket Roughing 25-2
Irregular Pocket Finishing 25-10
Use the G89.1 irregular pocket milling roughing cycle to rough out
irregular pockets. Irregular pockets are pockets that are not rectangular,
circular, or hemispherical. It is possible to form an irregular post inside an
irregular pocket by combining two or more irregular pocket cycles.
You can use the irregular pocket milling finishing cycle (G89.2) to finish
an irregular pocket in a workpiece. This cycle is typically used to finish an
irregular pocket formed using a G89.1 irregular pocket roughing cycle. A
tool change may be performed between the G89.1 and G89.2 cycles.
Important: The active plane is selected using G17, G18, or G19. In this
chapter it is assumed that G17, the XY plane, is selected as the active
plane.
Important: Tool length and diameter offsets must be entered and active
prior to the G89 block.
These features are prohibited during execution of irregular pocket milling
cycles:
MDI mode
Tool offset changes
The following subsection covers using the G89.1 roughing cycle for
irregular pockets.
25.0
Chapter Overview
25.1
Irregular Pocket Milling