Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 341)

Overtravels and Programmable Zones
Chapter 12
12-3
The coordinate values of the points defining the software overtravels are
set in AMP by the system installer. This overtravel may only be disabled
by the system installer in AMP. If the system installer has enabled the
software overtravels the control will not be allowed to exit the area defined
by the software overtravels.
Figure 12.2
Software Overtravels Established in AMP
Cutting
tool
Entry of a cutting
tool into this hatched
line area is prohibited
by software overtravel
This point (tool gauge point) is prohibited
from entering software overtravel
Software
overtravel
Hardware
overtravel
The system installer selects values that represent a maximum and a
minimum value in the form of coordinate values for each axis. These
coordinate values define points on the machine coordinate system. Axes
are then not allowed to move past the coordinate value representing the
maximum and minimum value on each axis. This limited range of motion
is referred to as the software overtravels.
12.2
Software Overtravels