[simpits-tech] rotary encoder

[RickInNoCal at aol.com]

Yes, partly, though even mechanical encoders generally don't skip unless 
they're REALLY spinning - not the sort of turn you could give them with your 
fingers, anyway. (The main incentve for optical rotaries is physical wear)

A rotary encoder makes across both pairs of contacts (Either A-B and B-C or 
A-B and C-D depending on design) in both directions - both signals are always 
sent, only the order changes. 

In a Knitter, though, only the A-B *OR* the B-C pins make, depending on the 
direction of turn. This needs a mechanism that allows the connection to the 
common contact to jump over the 'C' contact if turning one way, or over the 'A' 
contact if turning the other. This mechanism, unfortunately, also apparently 
allows the common to sometimes even jump over the contact it isn't supposed to 
jump over.

Richard 

In a message dated 2/5/04 4:59:43 PM Pacific Standard Time, 
mikebrogley at ieee.org writes:

> Isn't this what led to the use of optical encoders? Or do they skip too?

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