Roller Alignment - Standards

Kevin Lifsey

Presented by David R. Roisum, Ph.D., Finishing Technologies, Inc.

Published roller alignment guidelines are almost nonexistent in the web industries and are largely confined to internal publications of but a few machine builders. Furthermore, those standards were based on what these builders could do rather than necessarily what they should do; sometimes resulting in excessive maintenance costs. Worse yet, almost all builders are silent on the subject of alignment; at times causing excessive waste and delay due to problems such as mis-registration, web breaks and wrinkling. What this article seeks to do is to define maximum allowable misalignment tolerances based on web handling models and principles.

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