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Roller alignment is one key element in any converting process. Why is roller alignment so critical? One web handling principal states that a web will seek a 90 degree angle to a roller, in its' entry span to that roller. Entry span is defined as unsupported web distance to the idler or driven roller. Keep in mind the web must be in traction with the roller in question for the web handling principal to apply. So, if rollers are not parallel with each other in a converting process, a web will actually bend out of its' normal running plane in order to maintain a 90 degree angle to the non-parallel roller.
Why does this matter? When a web moves to maintain the perpendicular entry rule, undue stress can cause wrinkles. A web may move out of proper position for your process - this is why web guides are required for most converting applications. Product quality may suffer due to defects caused by web stress.
Roller alignment may be required for your process if you see problems relating improper web alignment (wrinkling, edge alignment, defects). This roller alignment may be attempted with tape measures and levels. However, laser alignment may be required to accurately align your rollers in your process.
Written By: Jeffrey Damour, Sales Manager, Converter Accessory Corporation, Wind Gap, PA
**DISCLAIMER - A great deal of time has been invested in the development of our weekly tech tips. To the best of our knowledge, they are accurate. It is up to the user to verify all results.|
THE AUTHOR ASSUMES NO LIABILITY CONNECTED WITH THE USE OF THIS INFORMATION OR THE RESULTS OBTAINED FROM IT.
201 Alpha Road
P.O. Box 188
Wind Gap PA 18091-0188
Phone (800) 433-2413 or (610) 863-6008
Fax (800) 709-1007 or (610) 863-7818
What is Web Handling?|
Web Handling is the science, engineering and equipment necessary to successfully transport a continuous flexible material through various processes without defect. Enhancing Web Handling with proper equipment will ensure materials are processed at their maximum efficiency, allowing the process to generate maximum profits.
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