Roller Alignment - Standards

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.