Roller and equipment alignment relies on each roller or machine frame holding highly accurate relative positions. In smaller web lines where all rollers are supported from the same base, the goal is to keep all rollers aligned to each other. In large web lines that span many meters of length, across different sections of the building and possibly moving from one floor to another, holding all the rollers parallel to each other may prove difficult, need ongoing monitoring and occasional re-adjustments as the web or process demands them.
In an ideal web line, the roller and frame alignment would be checked and set upon installation and never need re-adjustment. However, many lines need to expect and plan for problematic misalignment and re-alignment.