Web Thickness Measurement
|Web Thickness App Notes.pdf|
Regulating the thickness of a nonconductive fiber web across its width and length (rubber, paper, dough, plastic, particle board, etc.)
Maintaining a precise material thickness (±0.001 inch).
Making measurements in the presence of environmental contaminants.
Web thickness is controlled by the position of two calendar rollers. Kaman’s single-channel sensor is mounted on a shoe that slides across the web as it exits the rollers (see Figure 1). The sensor looks through the nonconductive web to measure the distance to a metal backing.
Kaman’s systems provide a DC analog signal directly proportional to the web thickness. Result: Improved web quality and reduced process costs
THE KAMAN ADVANTAGE
Non-contact. 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 sensor measures the web thickness as the material exits the rollers. A set point can be triggered to warn when out-of-tolerance conditions are reached.
Rugged. Kaman’s system components — the sensors and a NEMA-12 box used to house the signal conditioning electronics — are unaffected by environmental contaminants.
Versatile. The KDM-8200/8206 non-contact measurement is equally effective for particle board and plastics.
Accurate. The system passively compensates for the temperature shifts of the process environment.
Every application is unique.