GEH-6641E
—————— Function Description ——————
164
Ch.1
Dancer constant measurement:
Set the Drive keypad on the PID feed-back parameter.
Measure and multiply by 2 the distance in mm between the lower mechanical limit switch and the Dancer position
so that the value 0 (electric 0 position) is displayed on the PID feed-back parameter. Being that the Dancer is
made of a single pitch, multiply by 2 the above calculated value.
In our case set:
Dancer constant = 640mm
Set Minimum diameter equal to the value of the winder minimum diameter [cm]:
Minimum diameter = 10cm
1.16.5 Use of the Diameter Sensor
Dancer
Winder/Unwinder
M
Feed-forward
Feed-back
-10V
+10V
5Kohm
E
R
Sensor diameter
0 - 10V
Nip-roll
M
E
DRIVE
DRIVE
Figure 1.16.5.1: Winder/Unwinder Control with Diameter Sensor
The diameter sensor can be used in case of systems with automatic changing unwinders. In such conditions it is
necessary to know the value of the starting diameter in order to calculate the reference of the motor angular
speed before carrying out the coil new winding procedure.
The transducer has to be set in order to supply a voltage signal proportional to the winder diameter.
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