In mail sorting systems, various pieces of mail are collected and sorted by recipient. Letters and packages are led to the scanner system by a conveyor belt. The system scans the recipient's information and sends a signal to the subsequent stations with regard to how to further route the package.Correct adjustment of the infeed conveyor, the scanner system and the discharge conveyor are necessary for rapid and correct sorting.The incremental encoders determine the conveyor belt speed necessary for controlling the scanner frequency and the belt speed of the discharge conveyor and the subsequent station.In this application, incremental encoder DFS60 can be mounted either on the deflection roller or directly on the belt drive mechanism. Both mounting options have the disadvantage that a potential slip between the roller and the conveyor is not detected.A more precise measurement can be obtained with a measuring wheel encoder such as the DFV60. It consists of a DFS60 encoder, 2 measuring wheels and a spring-mounted arm, which takes the speed directly from the conveyor belt.The measuring wheel encoder system specifically adjusted for this requirement provides for slip-free speed monitoring on location. Through the free programmability of the line count, electronic interface and other functions of the DFS60, the highest flexibility is provided at maximum application
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