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GOAL

* Controlling the gap between two rollers used to press and process web material (rubber, paper, dough, etc.).

* Maintaining a precise material thickness.

* Avoiding web damage or web jams from too much roller pressure.

* Minimizing roller wear and cost.

* Making measurements in the presence of environmental contaminants, such as paper dust and dirt.

SOLUTION

Kaman's KDM-8000 measuring system How does the system work? Two Kaman sensors are mounted on bearing blocks, one on each end of the top roller. A conductive target is mounted on the opposite bearing block. The sensor measures the distance to the target as the web is running. Kaman's system provides a DC analog signal - or an optional digital interface - directly proportional to the roller gap. The data indicates roll gap uniformity across the web. This information can be used for initial set-up and for process control through a feedback network. Result: Improved web quality, lower maintenance costs, and reduced process costs.

THE KAMAN ADVANTAGE Why use the Kaman KDM-8000 measuring system?

* noncontact. Using eddy current technology, the sensor can measure position without ever touching the target. The result is an extremely reliable system with no moving parts.

* on-line. The sensors measure the roller gap as the web is being processed. Pre-programmed limits (rollers too close or too far apart, wad detection, or other conditions) warn of an out-or-tolerance situation, providing complete on-line control. * rugged. Kaman's system components - the sensors and a NEMA-12 box used to house the signal conditioning electronics - are unaffected by environmental contaminants or by the water used to wash the rollers.

* accurate. The system passively compensates for the temperature shifts of the process environment.