Classification of rotary encoder！

1, in accordance with the reading method Encoders can be divided into contact and non-contact encoder .
Contact with the brush output, a brush contact with the conductive area or insulation area to indicate the status code is "1" or "0"; non-contact to accept the sensor is a photosensitive element or magnetic components, photosensor Light-transmitting area and opaque area to indicate whether the state of the code is "1" or "0".
2, in accordance with the working principle of the encoder can be divided into two types of incremental and absolute.
Incremental encoder is the displacement into a periodic electrical signal, then the electrical signal into a count pulse, with the number of pulses that the size of the displacement. Each position of the absolute encoder corresponds to a definite digital code, so its indication is only related to the starting and ending positions of the measurement, independent of the intermediate process of the measurement. .

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