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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