Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 343)

Overtravels and Programmable Zones
Chapter 12
12-5
Programmable zone 2 defines an area which the tool axes may not enter.
Generally, zones are used to protect some vital area of the machine or part
located within the software overtravels.
Important: Programmable zones are defined using coordinates in the
machine coordinate system. They are not affected by any changes in the
work coordinate system, including external offsets. They do however take
into account any active tool offset.
Values for programmable zone 2 are entered in the programmable zone
tables as discussed in section 3.5. These values represent a maximum and
a minimum value in the form of machine coordinate values for each axis.
The area defined by these points establishes the boundaries for
programmable zone 2.
Figure 12.4
Area Defining Programmable Zone 2
Y
Programmable Zone 2
as defined by minimum
and maximum axis values
Max Y
value
Min Y
value
Z
X
Machine
coordinate
zero
Min X
value
Max X
value
Max Z
value
Min Z
value
Programmable zones 2 and 3 become active when a G22 block is executed
and are cancelled when a G23 is executed. Both G22 and G23 are modal
commands.
Important: You must home your axes first before the control will enable
the programmable zones.
12.3
Programmable Zone 2 (G22,
G23)