December 2009 PFFC

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Get a Grip: Driving Your Web

In my October 2007 column, “In Search of Tension Isolation,” I myth-busted the belief that a high traction driven roller can completely isolate one tension zone from another. However, the subtle effect of web transport should not sway you from designing all driven rollers with traction sufficient to support your apparent or actual tension differential between tension zones. If your driven pacer roller slips, you lose control of line speed. If your driven follower rollers slip, you lose tension control. As if losing speed and tension control isn't bad enough, slipping rollers of any kind lead to loss ...

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