Re: accurate angle measurement

Steve wrote:
In article <1158159691.036874.174810@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
msardon@xxxxxxxxxxx (mario) wrote:

*Subject:* Re: accurate angle measurement
*From:* "mario" <msardon@xxxxxxxxxxx>
*Date:* 13 Sep 2006 08:01:31 -0700

Hi Dave,

My needings are: incremental, accuracy half second or second at
most,
speed 1.5 revs/sec at most, yes 360 degree, $ 500 to 700 approx
Thanks


Add a 'k' to those values and you just might do it.

Do you really mean seconds ? To put what you've said in context, that's
less than the width of a motorway measured from the centre of the earth.


Another way: you're asking for 1 part in 1296000 _accuracy_. Even that
kind of _resolution_ is not easy.

John Perry
.

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