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The encoder

The encoder is a signal (such as bit stream), or data compilation, in order to convert the available forms of communication, transmission and storage of equipment. The encoder is a device the angular displacement or linear displacement into electrical signals. The former is called code disc, the latter known yardstick. In accordance with the readout mode encoder can be divided into contact and non-contact two; in accordance with the principle of the encoder can be divided into incremental and absolute categories. Incremental encoder displacement is converted into periodic electrical signals, then converted into electrical signals that count pulse represents the magnitude of displacement by the number of pulses. Absolute encoders at each position corresponding to a certain digital code, so its value is only shown with the beginning and end of the measurement, but not to the middle of the process measurement.

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