U Page 32
Digital controller RK 4004
.1.9. velocity defect
So that, in the event of a web displacement (e.g. seam joint) the ac-
tuator no longer follows up at maximum positioning velocity in "auto-
matic" mode, the positioning velocity may be reduced to a required
value.
From which degree of control deviation (web offset) onwards the re-
duction is activated, must be set in parameter ".2.2. defect range ±" .
In the case of a support beam this velocity setting is determined in
"search for edge" mode.
This parameter is only active if "defect detection" is selected in pa-
rameter .9.7..
.2.0. derated velocity
Not assigned at present.
.2.1. reseved 21
Not assigned at present.
.2.2. defect range ±
If the set value is exceeded, the positioning velocity will be reduced to
the value set in parameter ".1.9. velocity defect". In the event of a
sudden web displacement (seam joint) this prevents the actuator fol-
lowing up at maximum positioning velocity which might lead to a web
tear.
This parameter is only active if "defect detection" is selected in pa-
rameter .9.7. .
.2.3. servo configuration
Parameter block for setting the motor data.
".2.2. defect range ±"
Switching threshold
for reducing the po-
sitioning velocity
Web edge progression in
the sensor
".1.9. velocity
emergence"
Value of the re-
duced posi-
tioning velocity
