The design and commissioning of a drive often involves balancing competing parameter settings (tradeoffs).
A few considerations are listed below:
The ramp rate for speed should be as fast as possible for maximum production. The web may resist too fast an acceleration. Other factors such as heating up the dryer may also limit the line acceleration.
A long S time for the S-Ramp makes for better tension control. However, this reduces productivity as the operator must wait a long time for the line to start and stop.
On starting, a quality roll build should have run tension established as soon as possible after starting to keep roll density high at the core. The web may not permit very fast changes in tension.
The diameter calculator may be smoothest with a slow filter. The slow filter creates lag errors in diameter and thus tension when the speed is changing.
A tension filter may be required to smooth tension and prevent the drive from jerking to react to perceived tension swings. The long filter may reduce the tension-regulator response when it is needed, such as during a splice or speed change.