Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 354)

Coordinate Control
Chapter 11
11-38
Programmable zone 2 defines an area which the grinding wheel cannot
enter. Generally, you use zones 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 take into
account any active wheel length offset but not wheel radius offsets.
Values for programmable zone 2 are entered in the programmable zone
tables as described on page 3-25. These values represent a maximum and a
minimum machine coordinate value for each axis. The area defined by
these points establishes the boundaries for programmable zone 2.
Figure 11.22
Area Defining Programmable Zone 2
Programmable Zone 2
as defined by minimum
and maximum axis values
Machine
coordinate
zero
Min Z
value Max Z
value
Z
X
Min X
value
Max X
value
12104-I
Programmable zones 2 and 3 become active when a G22 block is executed
and are canceled when a G23 is executed. Both G22 and G23 are modal
commands.
Important: When made active the current grinding wheel location must be
outside of the area defined by programmable zone 2.
Important: Special programmable zone considerations must be made
when using programmable zones on an angled-wheel grinder. Refer to
page 14-18 for details.
11.8.3
Programmable Zone 2
(G22, G23)