Cleveland Motion Controls WebPro Winder Tension ControllerMWP-12664 REV BA - Manual (Page 20)

AO-70171
19
Revision BA
WebPro Winder Tension Controller
changed and adjust the parameter using the numeric keys or the +/- keys. Press the CONFIRM key to
implement and save the change. An asterisk alongside the Product Number indicates that a parameter
has been changed and that the CONFIRM key must be pressed to implement and save the change.
When the best performance is achieved stop the machine, remember to press CONFIRM and then press
SET UP to return to the Commissioning menu.
To simplify the tuning there are five factory set PI values. One of these values should be suitable for most
applications. If it is found necessary to apply different PI values, select Custom and starting from PI
values that gave stable but sluggish operation, reduce the P band % value and reduce the I time value
until the desired performance is achieved. Remember to press the CONFIRM key before exiting the
Product Parameter or the Adjust PI stability menus in order to implement and save any changes.
The five preset PI values are:
very slow slow medium fast very fast
Proportional band 2000% 1200% 800% 500% 200%
Integral time 20 sec 12 sec 8 sec 5 sec 2 sec
Maximum Trim
Set this item to a value which gives best overall performance. Too large a value may apply too much
correction and make the system unstable. The value should be sufficient to compensate for tension
disturbances, diameter calculator errors and any other errors. Extensible materials may require a trim
value higher than more rigid materials. As a guide set this value to 10%.
Controller Tuning - Torque Control
It is essential that all motor drives are correctly set in accordance with the suppliers instructions BEFORE
the Controller is commissioned. The Controller will not compensate for incorrectly set drives.
The line speed signal may be used to reduce any tension error caused by the inertia of a full reel when
the machine accelerates or decelerates.
In Torque mode, with the tension OFF, the winder torque voltage as determined by the diameter
calculator and the tension set point will be output from the Control Out terminal TB4/5. This should
correspond closely to +10V at maximum diameter and maximum tension if the Output Level Limit is
100%.
Output Level Limit
First set this item to a value equivalent to the winder drive torque input voltage at maximum torque. If the
winder drive torque input at maximum torque is +10V this item should be set to 100%, if the torque input
at maximum torque is +5V set this to 50%.
Select high tension and with the tension OFF, run the machine slowly with a reel of maximum diameter
and with the Tension Set Point at maximum. Adjust the Output Level Limit until the measured tension is
also at maximum. This will require stopping the machine and changing menus.
Static Friction
With no material in the machine, start the machine with the line speed set to zero so that the motors are
energised but not rotating, increase the Static Friction value until the winder motor just starts to rotate
then decrease slightly, the winder motor will slow to rest. This overcomes any static friction in the winder
drive.
Dynamic Friction
First set the Maximum Trim value to 5% and the PI to very slow to reduce the effect of the control
function.
Run the machine slowly with a full reel at a tension near maximum. Slowly increase the machine speed to