Re: [CAD_CAM_EDM_DRO] Tapping into the group knowledge - DRO

Silly me - brain not in gear! So, we really need a big rubber covered wheel
driving the normal mouse ball?

Ian
--
Ian W. Wright
Sheffield UK
www.iw63.freeserve.co.uk

----- Original Message -----
From: "Ward M." <wardmerk@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: 29 June 2001 08:42
Subject: RE: [CAD_CAM_EDM_DRO] Tapping into the group knowledge - DRO


> No, because the mouse measures motion with respect to distance. An inch
is
> still an inch, whether measured on a large or small ball surface.
>
> Thanks,
>
> Ward M.
>
> wardmerk@... <mailto:wardmerk@...>
>
>
>
> -----Original Message-----
> From: Ian Wright [mailto:Ian@...]
> Sent: Thursday, June 28, 2001 11:51 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] Tapping into the group knowledge - DRO
>
>
> Hi Art,
>
> How about changing the mounting of the mouse pc board so you could use a
> wheel of larger diameter than the mouse ball? Double the diameter should
> give you double the resolution - no?
>
> Ian
> --
> Ian W. Wright
> Sheffield UK
> www.iw63.freeserve.co.uk
> ----- Original Message -----
> From: "Art Fenerty" <fenerty@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: 29 June 2001 06:06
> Subject: Re: [CAD_CAM_EDM_DRO] Tapping into the group knowledge - DRO
>
>
> > Well, I couldn't help myself, I had to check. The optical mouse IC specs
> are
> > on the below link. It is a 400cpi quadrature encoder which can be used
at
> 12
> > inches per second. Maybe too low a resolution? Mayeb there's a way to
make
> a
> > dual sliding assembly to double its true resolution. Sounds like a real
> > cheap way to make a pretty good hobby DRO.
> >
> > http://www2.taconuts.com/articles/2000/12/3/hdns2000.pdf
> >
> > Art
> >
> >
> >
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