betacontrol: Doppler laser tracks film speed
A Doppler laser sensor measures the length and speed of film webs for highly accurate speed matching in calendering, coating and laminating operations. The Micro AWS non-contact laser sensor was introduced two years ago by betacontrol GmbH in Germany and is now available here via Baumer of America in Towaco, N.Y. The Micro AWS sensor, used with betacontrol’s Indicon One real-time controller, detects speed and length without slippage, betacontrol says.