Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 342)

Chapter 12
Overtravels and Programmable Zones
12-4
Figure 12.3
Area Defining Software Overtravel
Z
Y
X
Software overtravel area as defined in
AMP by min. and max. axis values
Max X
value Min X
value
Min Z
value
Max Z
value
Min Y
value
Max Y
value
Machine
coordinate
zero
Typically the software overtravels are located within the hardware
overtravels (maximum axis travel defined by the limit switches on each
axis) and are used to keep the axes within the range the system installer
determines is usable for that particular machine’s application.
The area defined by the software overtravels becomes effective after
completion of the initial homing operation at power up. For details on how
the control reacts to a entry into an overtravel area see section 12.5.
CAUTION: The area defined by a software overtravel does not
take in to account any tool offsets. This may allow the actual
tool to enter the restricted area without the axes entering it.
Make sure this is considered when the software overtravel is
established.