Web201.44ba – Bowed Roller Failure Modes – Loss of Traction
***201.44b – Bowed Roller Failure Modes – Loss of Traction
04 Slides Duration 01.59 v 15.08.26
201.44b.01 – Title Slide
Welcome to web handling. My name is Dave Roisum. In this clip we continue our series on bowed roller failure modes by looking at the loss of traction.
201.44b.02 – Two Modes
As we outlined in a previous Web201 clip and as we detailed in our Web101 class, there are two modes of operation for a single bowed roller. As we learned in Web101, there are also two modes of operation for a dual bowed roller system.
In this and subsequent clips in the series, we will primarily concern ourselves with the most common situation, a single roller in the bowed roller mode.
201.44b.03 – Slippage Begins at Edges
The most common design application error for the bowed roller is pushing spreading too far. The result is problems at the edges where the edges are asked to move outward more than traction allows. As we learned in Web101, they break loose and run into their neighbors that are still in traction resulting in the ubiquitous quarter-point spreading problems. In Web101 we learned how to size bow magnitude as well as how to adjust bow orientation. In Web101 we gave many slides on how to detect and avoid these most common spreading application errors.
201.44b.04 – Questions?
Thank you so very much for watching this module in my plant practical video clips. Stay tuned in the next clip where we will show how a properly configured drive motor can improve spreading, especially for light weight products as well as how driving it poorly or not at all can degrade or even destroy spreading.