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Home March 17, 2010

Surface Prep
Carton/Box
- Folding / Gluing
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Tracking Wrinkles: Part II

Published Tuesday, June 01, 2004

The easiest way to explain roller diameter variation tracking is to walk you through the chain of events. Diameter variations create web strain variations. The tensioned web will attempt to form to the roller's shape. The average web strain will not change, but the web will stretch more in large-diameter lanes and relax in small-diameter lanes. Strain variations create web tension variations. Elastic materials have a direct relationship between stress and strain. Multiply the strain change by the material's elastic modulus to get the induced tensile stress change. Roller-induced tension variations exert a torque on the web span. ...

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