136
OPERATION
96-8000
June 1999
3.19 TRAVEL L IMITS
Travel limits in this machine are defined by a limit switch in the positive direction and by stroke limits set by
parameter in the negative direction. Prior to establishing the home positions with the POWER UP/RESTART or
AUTO ALL AXES buttons, there are no travel limits and the user must be careful not to run the table into the
stops and damage the screws or way covers.
Prior to establishing the home positions (POWER UP/RESTART or AUTO ALL AXES), jogging is normally not
allowed. Setting 53 can be turned on to allow jogging prior to zero return but this defeats the travel limits and
you may damage the machine running the axes into the stops.
Note that all motion is in a negative direction from machine zero except for the Z-axis that can move about 4.5
inches up from machine zero. There are no travel limits for the fourth, A, axis. Travel limits for any auxiliary
axes are set into those single axis controls.
When jogging, an attempt to move past the travel limits will not cause an alarm but the axis will stop at the
limit. The JOG handle inputs may be ignored in this case.
When running a program, an attempt to move outside of the travel limits will cause an alarm prior to starting the
motion and the program will stop. An exception is a circular motion which starts and ends inside of the travel
limits but moves outside of the limits during the motion. This will cause an alarm to occur part way through the
motion.
Travel limits apply even when running a program in Graphics mode. An alarm is generated and the program will
stop.
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