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Richard Erlacher
03/03/12 08:25
  03/03/12 08:26

Read: 595 times
Denver, Co

#186387 - Isn't that absolute as well?
Responding to: Jim Granville's previous message
Jim Granville said:
Incremental is used as a tag because it contrasts with Absolute.

An absolute encoder knows where it is thru a power failure, an incremental encoder does not.

You see your description of "rotary or linear encoders. ...2500 pulses/turn" is not sufficient information.

I can have two rotary encoders, with 2500ppr - but one is Absolute, and the other is incremental (aka Quadrature optionally with index pulse)

Many years ago I had an encoder (on a motor) that provided an index and quadrature for 512 discrete positions. The index was fixed, so it persisted through power cycles. Do you consider that one absolute or merely incremental?


List of 20 messages in thread
controlling an incremental encoder      Carlos Gonzalez      03/01/12 21:50      
   controlling the encoders?      Jim Granville      03/01/12 22:05      
   Study time!      Andy Neil      03/01/12 23:41      
      Encoder is Feed back element      Satish S Munot      03/02/12 08:51      
         Encoder is normally feedback loop...      Per Westermark      03/02/12 11:05      
   Incremental?      Per Westermark      03/02/12 02:50      
      Incremental contrasts with Absolute      Jim Granville      03/02/12 02:59      
         Relative      Per Westermark      03/02/12 03:05      
            A small positive or negative change      Jim Granville      03/02/12 20:26      
         Isn't that absolute as well?      Richard Erlacher      03/03/12 08:25      
            trick question?      Erik Malund      03/03/12 11:00      
               by contrast ...      Richard Erlacher      03/03/12 15:28      
                  yes, but      Erik Malund      03/03/12 15:56      
                     O.K. I get it ...      Richard Erlacher      03/04/12 08:03      
                  Even With Index      Michael Karas      03/03/12 22:04      
                     Single Track Absolute Encoders      Michael Karas      03/04/12 07:20      
   just a point      Erik Malund      03/02/12 06:46      
   re      Ramesh Rai      04/18/12 20:59      
      Wrong sort of encoder!      Andy Neil      04/18/12 23:18      
      Spammer      Per Westermark      04/19/12 07:30      

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