
B–63503EN–1/01
2. PREPARATIONS FOR OPERATION
68
When the tool tries to move beyond the stroke end set by the machine tool
limit switch, the tool decelerates and stops because of working the limit
switch and an OVER TRAVEL is displayed.
[Classification] Input signal
[Function] Indicates that the control axis has reached its stroke limit. There are
signals for every direction in every control axis. The +/– in the signal
name indicates the direction and the number corresponds to the control
axis.
1 No. 1 axis is at stroke limit.
2 No. 2 axis is at stroke limit.
3 No. 3 axis is at stroke limit.
4 No. 4 axis is at stroke limit.
+ Has moved to and reached a + direction.
– Has moved to and reached a – direction.
+ L 1
[Operation] When it is “0” , the control unit operates as given below.
@ In automatic operation, if even one axis overtravel signal turns to “0”,
all axes are decelerated to stop, an alarm is given and operation is
halted.
@ In manual operation, only the axis whose movement signal has turned
to “0” is decelerated to a stop, and the axis can be moved in the
opposite direction.
@ Once the axis overtravel signal has turned to “0”, the axis direction is
registered. Even if the signal returns to “1”, it is not possible to move
that axis in that direction until the alarm is cleared.
2.3
OVERTRAVEL
CHECK
2.3.1
Overtravel Signal
General
Signal
Overtravel signal
*+L1 to *+L4<G114>
*+L1 to *–L4<G116>