Re: [CAD_CAM_EDM_DRO] Re: More DRO questions..

Well I wasn't worried about the demagnetize part but the actual
damage to the strip and its reader. There was not an obviouss way to
protect them from physical damage in the views they had posted.

Garry

To: CAD_CAM_EDM_DRO@yahoogroups.com
From: Steve Smith <sos@...>
Date sent: Sun, 11 Nov 2001 19:58:56 -0700
Send reply to: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] Re: More DRO questions..

> It takes a pretty strong field to demagnetize magnetic tape, if the strips are made of the same magnetic material. A horseshoe magnet won't do it as the field isn't strong enough. A tiny chip of the same magnet might demagnetize a small spot (much more concentrated field). So I suspect a

magnetic base isn't a problem. Chips shouldn't mess up the tape, except that they will interfere with the sensor's operation. Do they allow mounting the strip to a metal surface? Seems like that might interfere.

>
> Steve Smith
>
> rfs@... wrote:
>
> > RE: magnetic strips. The mag. strips I saw were thin, flexible and had a sticky back so they could be taped onto a surface. I asked about interference from nearby magnetic fields and the possibility of demagnetizing the strip. The rep. said that it is not a problem. I do not know the

output from the sensor but would suspect it to be a quadrature type system. The catalog states that "there are two possiblities for processing these values: direct display on the machine (via an electronic display unit) or data transfer to a master control via standard incremental interfaces
(phase-shifted square signals)" The sensor has to be within 2 mm of the mag. strip to work.

> > ...rfs
> > --- In CAD_CAM_EDM_DRO@y..., "Garry & Maxine Foster" <garry.foster@v...> wrote:
> > > My question is what do all the chips that stick to it do the it and
> > > the reader... Is it really for milling applications?
> > >
> > > Also notice they have a version of the wire encoders that have been
> > > mentioned in the past. It still seems to me that the wire system
> > > holds great promise for the home shop. I have been resisting buying
> > > the B&W Electronics versions for over a year now. They seem ideal to
> > > me but the cost is too much for me to just paly with. Wish they would
> > > send a both to Cabin Fever next year!.
> > >
> > > Garry
> > >
> > > To: CAD_CAM_EDM_DRO@y...
> > > From: wanliker@a...
> > > Date sent: Sun, 11 Nov 2001 15:33:24 EST
> > > Send reply to: CAD_CAM_EDM_DRO@y...
> > > Subject: Re: [CAD_CAM_EDM_DRO] More DRO questions..
> > >
> > > > My question about the mag type of strips, what happens when you change
> > > > magnetic fields around it. Use a magnetic based indicator holder near the
> > > > machine, what happens? Nothing, or wipe it out????????????
> > > > bill
> > > >
> > > >
> > > > [Non-text portions of this message have been removed]
> > > >
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