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Originally Posted by vamfun
Don't follow you here. All encoders have a resolution ambiguity. The 4x quadrature decoder is 1/4 of 1x but there still exists the ambiguity within the resolution deadband.
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We obviously have a different understanding of the word "ambiguity". I'm using it to mean that a specific measured value can indicate different things. You seem to be using it as a synonym of "precision" instead.
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Let's nix that "hysteresis" word, since it only applies to same edge reversals not all reversals and may be confusing.
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I thought you were only looking at transitions on one channel to determine when to change counts. With that assumption, it looks to me like "same edge reversals" are the only kind you would see.