Re: mouse encoder

At 01:12 22/08/2001 +0000, you wrote:

> > I haven't tried it but how about just 'gearing' the mouse encoder up. Like
>I
> > said in my last post, if you put a big pulley on a shaft with a rubber
>band
> > drive (like the flay rubber bands used in video recorders) to the mouse
> > encoder shaft, you would get a lot of 'transitions' from one revolution of
> > the shaft. If you aim for too many and then divide the result
> > electronically, I would guess you will get rid of a lot of the errors due
>to
> > inaccuracies in the encoder disk - or perhaps I'm way off base? I doubt it
> > would be any use to our'professional' chums but it might be useful on a
> > hobby mill.
>
>This is another good thought as well.
>All in all though, if it's possible, I'd like to make the disc to match the
>motor.

Gearing up would work fine as long as you use anti-backlash gearing;
otherwise, you lose position on a change of direction. Not a problem if all
you want is RPM measurement though.

Regards,
Tony