Re: [CAD_CAM_EDM_DRO] Re[2]: digitising arm

BAllendo,

Thanks, I'll drop in and see what they have. I have a 2D SMC digitizer,
and an old Kurta tablet. I did map digitizing with the Kurta, but never
got around to the SMC. Now if they were 3D... Haven't been to
Alltronics for a while now. I even built a prototype "sonic" digitizer
once, using ultrasonic transducers, but the patents were an obstacle,
and the phone/pad didn't go any further.

Alan


ballendo@... wrote:

>
> Alan wrote:
> >About twenty+ years ago, we had "sonic digitizers" (2D) for use in
> >Radiation Therapy<snip>3d versions, and used a stylus which created
> >a spark that could be heard by the "linear microphones" along each
> >axis. Not an arm, but might be an interesting approach.
>
> Alan,
>
> Alltronics (near you, on Zanker) had some "Sonic" 3d digitisers for
> sale not too long ago. They consist of a "noisemaker" (ultrasonic??)
> wand and a "receiver" which was three microphones on a folding
> structure which, when set up, put the microphones at the points of an
> equilateral triangle. I don't remember what the S/W format was
> (dos/win/etc)? Might be worth a look-see?
>
> Alltronics sells nationwide via mail order catalog, also.
>
> There are several makers of these "sonic" 3d digitisers. Some can be
> seen on the web. I always wondered what kind of REAL resolution was
> typical, and stayed away. But it seems a neat idea.
>
> Hope this helps.
>
> Ballendo
>