Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 356)

Coordinate Control
Chapter 11
11-40
Programmable zone 3 can define an area which the grinding wheel cannot
enter or cannot exit. This is determined by the current wheel location
when programmable zone 3 is made active. 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 offsets but not wheel radius offsets.
Values for programmable zone 3 are entered either in the programmable
zone table (described on page 3-25) or through a G22 program block. A
maximum and a minimum coordinate value (in the machine coordinate
system) is assigned for each axis. The resulting coordinates define the
boundaries for programmable zone 3.
Figure 11.24
Area Defining Programmable Zone 3
Inside or outside border of
Programmable Zone 3
as defined by minimum
and maximum axis values
X
Z
Max Z
value Min Z
value
Min X
value
Max X
value
Machine
coordinate
zero
Unlike the software overtravels, which define the perimeter of an area
from which the grinding wheel cannot exit, programmable zone 3 can
define either an area that the grinding wheel:
cannot exit if the wheel is inside the zone when the zone is activated
or
cannot enter if the wheel is outside the zone when the zone is activated
11.8.4
Programmable Zone 3
(G22.1, G23.1)