Re: [CAD_CAM_EDM_DRO] RE: re:Re: digitising arm

The Zeiss CMM use a crystal to sense first touch and the triggers a
mechanical switch to confirm touch. This is a very sensitive probe allowing
long extensions. Remember that a piezo electric lighter generates it's spark
by striking a crystal. Crystals will generate a voltage when deformed from
what my Zeiss rep. tells me.

----- Original Message -----
From: <ballendo@...>
To: <CAD_CAM_EDM_DRO@egroups.com>
Sent: Tuesday, November 14, 2000 11:11 PM
Subject: [CAD_CAM_EDM_DRO] RE: re:Re: digitising arm


> Dave e writes:
> >Piezio is usually ultrasound. (AFIK) but then I learn something
> >every day if I'm not careful. ;-)
>
> Yes. That would be the "other" direction. Put electrons into a
> crystal, it "squishes" itself (vibrates). :-)
>
> I really don't know "which" piezio the Roland people are using.
>
> I suppose it makes more sense to set the Piczas'tiny wire "probe"
> vibrating, and pay attention when the vibration changes frequency
> (because we touched something).
>
> Thank you.
>
> Ballendo
>
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