WHQuiz Answer #14 - Web Wrinkling and Deflection

WebHandlersQuiz 15: Wrinkling – If a roller is deflecting into a bowed shape due to gravity, which direction is it best NOT to approach that roller if you don’t want to wrinkle: vertically from above, vertically from below, or horizontally?

A bowed roller will tend to gather and wrinkle the web if the bow points towards the entering span. Therefore, a web approaching a roller vertically from below that is deflecting due to gravity is NOT the best approach.

More on this topic was covered in this archived Web Lines column: 

Q&A on Roller Deflection Nov 2002

If you missed it, here are all 20 questions in my Web Handler's Quiz

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