Force-controlled nip rollers or winding nip magnitude is too high, too low, or zero.
Problems with nip loads or pressures too high:
Problems with nip loads or pressures too low:
Position-controlled nip roller forces are too high, too low, or zero.
The force or pressure created by nipping rollers (or nipping against a winding roll) varies with time or process events and creates problems from being too high or too low.
The web tension distribution varies cross machine (or crossweb) direction (CD) from operator to drive side of the web.
Timothy J. Walker
President / Web Handling Specialist
4452 41st Avenue South
Minneapolis, Minnesota 55406
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