Re: [CAD_CAM_EDM_DRO] Re: digitizer probe and software

----- Original Message -----
From: Alan Marconett KM6VV <KM6VV@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, November 06, 2001 11:46 AM
Subject: [CAD_CAM_EDM_DRO] Re: digitizer probe and software


> Hi Fred,
>
> The "hollow" object example would be interesting to try. As long as
> StlTrans allows some point variation. When MaxNC generates points,
> besides the "extra" points, the coordinates are not simple multiples of
> the specified "scan" size. My first guess was that they were "machine
> coordinates", I.E., the closest the hardware can get to the commanded
> position. For example, these are produced with 0.020 spacing:
>
> X0.0000Z-0.1446
> X0.0195Z-0.1439
> X0.0390Z-0.1439
> X0.0585Z-0.1436
> X0.0780Z-0.1439
> X0.0975Z-0.1437
> X0.1170Z-0.1436
> X0.1365Z-0.1436
> X0.1560Z-0.1436
>
> BUT, .020 is an even multiple of .000125 (Sherline CNC), so that doesn't
> explain it. Hopefully, these aren't too far "off the grid".
>
> Sounds like a good deal on the XP. Looks like I've got another year to
> wait before I get a new (free?) machine.
>
> Alan KM6VV
>
>
> Fred Smith wrote:
> >
> > --- In CAD_CAM_EDM_DRO@y..., Alan Marconett KM6VV <KM6VV@a...> wrote:
> > > Hi Fred,
> > >
> > > I looked at the Picza, nice machine! Thanks for the comments and
> > > explanations.
> > >
> > > On the XYZ's the Vector CAD/CAM 9.3 can generate; Does that assume
> > that
> > > the DXF data is EVENLY spaced (on "the grid")? a MaxNC digitizer
> > scan
> > > will have fairly even spacing if the depth remains the same, but
> > will
> > > add more "sample points" if it finds an edge. Great for "copy",
> > might
> > > be hard to convert to XYZ?
> >
> > Vector does not care about the spacing, just that they are planar. X-
> > Z plane for instance if you scan along the X axis and step over in Y
> >
> > StlTrans needs equal number of points in rows and columns, with the
> > actual values allowed to vary. I do not know if there are any limits
> > on the variation that is allowed from point to point, but would
> > assume that you could theoretically feed it the coordinates of a
> > hollow object and it would be able to create the inside enclosed
> > volume, as well as a shell.
> >
> > Best Regards,
> >
> > Fred Smith
> > IMService
> >
> > PS the XP was because so many people wanted to know if the new Vector
> > worked. I went with the 1.4 GHZ because it was only about $100 more
> > expensive than the slowest AMD available, a 900 mhz. Still only
> > about $700 total.
>
>
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