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Encoders : Absolute Encoder

An encoder is is any device or method used to translate information from one format to another. In the case of machinery systems, encoders are typically used to convert transducer signals measure position and orientation to a signal that is sent to a processed by a control system. Absolute encoders are used in conditions where the actual position must be known without the need for a refernce position. Absolute encoders are useful in situations where power-down cycles or accidental shutdowns prevent the storage of reference information.