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Secondary Encoder Feedback
#1
In my system I have a servo motor driving a set of rolls which feeds material and also a second encoder providing position feedback (the material at times slips slightly in the feed rolls).

This setup is pretty straightforward, Ixx03 points to the encoder tracking the material position and Ixx04 points to the servo motor encoder.

All is working well except there is one issue, if the encoder or rolls lose contact with the web material there is no following error so the servo driving the rollers will run away.

What suggestions would there be for fixing this issue?

Thanks
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#2
This should build up a following error and trip the FFE. The encoder "output" should just stop at the last value so the PID output will increase. I would expect FFE to kick in and kill the motor.

Contact us in technical support to further investigate this - support@deltatau.com.
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