Rockwell Automation 8520 9/Series CNC Lathe User Manual
Page 760
Chapter 30
Using a 9/Series Dual--Processing System
30-20
Activating Interference Checking
The interference boundaries for each process are entered into the
interference checking tables. These tables relate the boundaries to specific
tool or offset geometries. The system installer selects the number of
boundaries that are available (from 1-32) for each process.
Each process can have a different interference boundary number active at
the same time. Activating an interference boundary for only one process is
not sufficient to activate interference checking. Each process must have an
active, valid interference boundary.
The system installer determines how the different interference boundaries
are activated for each process through PAL. Refer to your system
installer’s documentation for details on activating these boundaries.
Before interference checking can be activated, all axes that make up a
boundary must be homed.
Important: Your system installer has the option to determine with PAL
when interference checking will become active. Interference checking is
available in:
manual mode
automatic and MDI modes
manual, automatic, and MDI modes
Refer to your system installer’s documentation for details.
Once interference checking is turned on, it remains active in that mode
(Auto, MDI, or Manual) until turned off through the system installer’s
PAL. This includes when no program is active, a control reset is
performed, or even when the control is in E-Stop (unless PAL has been
specifically written to do so). Interference checking can also be active in
mechanical handle feed mode (servo off).
Interference checking is not performed on the part program during
QuickCheck mode. Interference checking is still active in QuickCheck;
however, since axis motion is not usually present during QuickCheck,
programmed collisions are not detected.
Important: Shared axes can only be defined in an interference zone in one
process. If the system installer defines the same shared axis to be in an
interference zone for both processes the control generates an error.