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Optics Lens

Rotary encoder resolution and accuracy

by:HENGXIANG     2020-11-10
The choose and buy when the rotary encoder, accuracy and resolution of the encoder is the product designers must consider a problem, what is the relationship between the two? Rotary encoder resolution and accuracy, and can take micrometer, for example, on behalf of micrometer resolution up to read a few decimal places, but also a ruler and the machining accuracy, precision measurement method. Similarly, in the use of rotary encoder, resolution and accuracy are two different concepts. The resolution of the encoder, refers to the minimum Angle encoder output can be read and changes, the corresponding parameters are: every turn scribed line number ( 线) Turn, each pulse number ( PPR) Step, minimum distance ( 步骤) , a ( 位) And so on. The precision of rotary encoder, is refers to the encoder output signal data on real Angle measurement accuracy, the corresponding parameter is Angle points ( ′ ) , Angle seconds ( ″ ) 。 Rotary encoder resolution: line ( 线) , is the optical scribed line for the code salver of the encoder, if the encoder is directly square wave output, it is every turn pulse number ( PPR) But if it is cosine ( sin/cos) Signal output, can be through changing signal analog electronic division, get more square wave pulse output, PPR encoder square wave output has A and B facies, A phase B is A quarter of A pulse cycle, through the judgment of rising and falling, you can gain A quarter pulse cycle change interval ( Four times the frequency) , this is the minimum measurement interval ( 步骤) So, strictly speaking, the minimum interval measurement is the resolution of the encoder. For example, German Hyde han ROD426 3600 encoder, square wave output, is 3600 PPR, 0 pulse cycle. 1 degree, after 4 times through A phase B phase frequency, 0 can be obtained. 025 degree measurement interval; And the head han provide the precision of the parameter for the Angle of 18 seconds ( 0. 005 degrees) 。 Resolution values greater than numerical precision. Shanghai electronics specializing in the production of rotary encoder for 27 years, the company has research and development production of magnetoelectric rotary encoder points incremental encoder and absolute encoder, the client can be used according to the requirements of their own to decide what kind of? Rotary encoder resolution and accuracy as well as exterior size of rotary encoder, etc all can according to customer's requirement to customize, looking for a manufacturer is looking for electronic magnetoelectric rotary encoder.
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