The keynote speech by Prabhaker R. Pagilla discussed the history of longitudinal web transport models. The history progressed to the current sate of the model. Implications for precise print registration were made, including tension oscillations introduced by web span changes due to eccentric rollers. Several examples were introduced including temperature effects on steel strip. New feedforward techniques were discussed to cancel the effects of span length variations.
A second paper by the same author showed a model for zero speed splicing using a festoon or accumulator.
Other papers discussed precise longitudinal print registration without compensator rollers. A paper discussed modeling or estimating tension based on roller angular position rather than load cells. Drives can resolve roller position to 1 part in a million.
Another paper discussed the selection of idler roller diameters and the many factors required to optimize tension between these idlers.
Dave Roisum discussed new ideas about using web oscillation to smooth gauge variations.
Amy Thuer discussed actually using web models to help. Set winding parameters to avoid defects.
There were some new extensions to winding models including lamination and nip loading. The technical portion concluded with a good discussion of the day's presentation and some specific web handling problems.
Dinner and time to socialize completed the excellent day.