December 2009 PFFC

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The Converting Relay Race: Part II

Web Lines We are halfway through our roll-to-roll relay race of the unwinding process (click here for Part I). Our rolls are loaded, spliced, and ready to run. To complete the unwinding relay, we need to finish strong with our plan for web alignment and tension control. Unwinds must be able to align the web, compensating for web position errors from unwind installation, web-to-core, core-to-chuck, and layer-to-layer within roll. The three most common methods to align unwinding rolls laterally are manual alignment, automatic sidelay guiding, and automatic displacement guiding. In manual alignment, you put the roll ...

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