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- Changchun Rongde Optics
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- North Lake Development District,
- Changchun 130102,China
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RESOLUTION AND ACCURACY OF ROTARY ENCODER！
Changchun Rongde Optics Co.,Ltd. Release time：2016/10/12 Browse：756Resolution is the number of measuring segments or units in one revolution of an
encoder shaft or one inch or mm of a linear scale. Shaft encoders are available with resolutions up to 10,000 pulses per revolution (PPR) directly, and 40,000 PPR by edge-detection of the A and B channels, while linear encoders are available with resolutions measured in microns. The bottom line is, the selected encoder must have resolution equal to or better than that required by the application. But resolution is not the whole story.Accuracy and resolution are different, and it is possible to have one without the other. This figure shows a distance X divided into 24 increments or “bits.” If X rep resents 360° of shaft rotation, then one revolution has been resolved into 24 parts.
While there are 24 bits of resolution, the 24 parts are not uniform. This transducer could not be used to measure position, velocity or acceler ation with any accuracy.
On the other hand, in this figure the distance X is divided into 24 equal parts.
Each increment represents exactly 1/24 of a revolution.
This transducer operates with accuracy as well as resolution. Accuracy, however,
can be independent of resolution. A transducer may have a resolution of only two
parts per revolution, yet its accuracy could be ±6 arc seconds.
hybrid encoder, non-magnetic encoder, multi-turn encoder, multi-turn combination encoder, draw wire encoder, digital readout, linear scale
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