July 2010 PFFC

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Cinching Belt Tightening Gone Bad: Part Two

The expression “it's a cinch” usually means something is easy, as easy as tightening a belt. However, as we learned last month, cinching is not something we want to hear about in the winding business. How do you know if your product is cinching? At unwinding, draw a spoke line from the core to the outside of the roll. Apply the tension and start unwinding. If the line remains in the spoke direction, the layers are not slipping relative to each other. If the spoke line turns into a spiral or forms a step, your roll is cinching. ...

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