What is the absolute encoder "absolute" definition！

What is the absolute encoder "absolute" definition

The rotary encoder is an important industrial mechanical position angle, length, speed feedback and participate in sensor-controlled, rotary encoders incremental encoder points, absolute encoder, absolute multi-turn encoder.

Received from an external device sense (such as servo controllers, PLC), the incremental value is the change in a relative position information, the change from point A to increases and decreases in the calculation of the signal at point B, also known as " relative ", it requires constant subsequent counting device, since each of the data are not independent, but depending on previous reading, the preceding data for errors by the generated interference power can not be determined, error accumulation resulting ; and "absolute mode" refers to the device initialization, determine an origin, after all location information is to this "origin" of the absolute position, it does not require continuous follow-counting equipment, but directly read the current position value for power and interference error may occur due to the impact of the front are independent from each reading, so as not to cause cumulative error, the receiving device, called "absolute" mode.

For absolute encoder inside the "absolute value" is defined, refers to all the internal position value encoder, the encoder after the production of the factory, within its range all the positions had been "absolutely" determined in the encoder, after initialization origin, each a unique and independent position, its internal and external data refresh every time to read, do not depend on previous data reading, whether it is inside or encoder external encoder, should not be the presence of the "count" cumulative with the previous reading, because such data is not "independent" "only" "All positions within the range have been pre-established absolute", and is also not consistent with the meaning of "absolute" the word.

So the real definition of absolute encoder refers to all locations within the range corresponding to advance the absolute position of the origin, it does not depend on the internal and external count accumulate and independent, the only absolute encoder.

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