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Introduction

Typically web-type material is fed from a reel into the finishing machine where is treaetd and then rewound again. Defects and lower quality results due to incorrect web tensions may occur in any of the processing steps.

Web tension after the unwinder

Too little web tension causes slacking in front of the trnasport drive.
Too high web tension causes longitudinal creases and web deformations.

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Web tension between clamping points

Crucial to the quality of the process is a constant web tension between clamping points.

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Web tension on the rewinder

If web tension on the rewinder is inadequate reel telescoping may occur.
If web tension on the rewinder is too high tension forces destroy the inner windings.

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E+L (Erhardt+Leimer) Ltd. / Products / Web Tension Measuring and Control systems ELTENS / Introduction