gefran TPD32-EV-500 series - Figure 6.16.3.12: Winder;Unwinder Control with Sensor Diameter

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311
Use of the diameter sensor
M
M
E
-10V
+10V
Feed-forward
Feed-back
5Kohm
E
R
DRIVE
DRIVE
Winder/unwinder
Dancer
Nip-roll
0-10V
Figure 6.16.3.12: Winder/unwinder control with sensor diameter
Thediametersensorcanbeusedincaseofunwindersystemwithautomaticgear.
Inthesecases,itisnecessarytoknowthevalueofthestartingdiameter,inordertocalculatethereferenceof
theangularspeedofthemotor,beforetheinsertionofthenewcore.
Thetransducermustsetinordertosupplyavoltagesignalproportionaltotherolldiameter.
F
V
90
900
1V
10V
min max
450
5V
Figure 6.16.3.13: Relation between transducer signal and coil signal
Example:
Φ
min
 =90mm  transduceroutput=1V
Φ
max
=900mm  transduceroutput=10V
Φ =450mm  transduceroutput=5V