doubling resolution strategy # 2

arcstarter@... wrote:

> Doug Fortune <pentam@...> wrote Thu Mar 8, 2001 1:28am:
> >Here today, I present another way to double (or more) the
> > resolution of the position feedback:
> > --- Use two encoders instead of one! ---
> >
> > This works for both linear encoders and rotary encoders giving out
> > quadrature signals.
>
> Hey that's a pretty cool idea!
>
> I bet your final relation between actual
> position and sensed position will form some sort of ....

Yes, thats why I suggested:

>At these resolutions, it will become increasingly desirable for all of us
>to invent some kind of super-precise calibration method, in order to
>correct for screw (and encoder scale) inaccuraccies in software.

anyone want to step in with suggestions on such a scheme?

Doug Fortune
http://www.cncKITS.com