
8.CONTROL FUNCTION LASER FUNCTION B-64663EN/01
- 234 -
Specify the speed assumed when an overtravel alarm is raised during
linear acceleration/deceleration before interpolation.
If an overtravel alarm is raised during linear acceleration/deceleration
before interpolation, the tool decelerates and stops after the alarm is
raised, so that it overruns by the deceleration distance. The overrun
distance varies depending on the feedrate assumed when the
overtravel alarm is raised. The overrun distance can be reduced by
performing deceleration in advance to achieve the speed specified in
parameter No. 1784 when an overtravel alarm is raised. In this case,
deceleration may be completed sooner because deceleration is
performed so that the feedrate assumed when an overtravel alarm is
raised does not exceed the speed specified in the parameter. The
feedrate assumed after the completion of deceleration is equal to the
speed specified in the parameter.
NOTE
This parameter is not effective to rapid traverse
blocks.
Deceleration is performed if the following condition is satisfied:
Distance to the stored stroke
limit on each axis
<
Distance required for reduction from the
current speed (tangent feedrate) to the
speed of parameter No.1784
The overrun distance will be as follows:
T
F
1875
1.5
8
T
F
T
FIX
≦distanceOverrun
2
OT
×
+×
F: Maximum cutting speed during linear acceleration/
deceleration before interpolation (parameter No. 1770)
T: Time required to reach the maximum cutting speed during
linear acceleration/deceleration before interpolation
(parameter No. 1771)
F
OT
: Speed assumed when an overtravel alarm is raised during
linear acceleration/deceleration before interpolation
(parameter No. 1784)
FIX: Rounds the value down to the nearest whole number.
NOTE
1 If 0 is set, the above control is not performed.
2 When the stroke check is disabled, the above
control is also disabled.
3 The above control is effective to stored stroke
check 1 only.