Re: [CAD_CAM_EDM_DRO] re: more box ways

Tom,

Download a program called PKZIP from here
http://www.pkware.com/
you get a 30 day evaluation. That should do it, but you
need to rename them back to the original names.
WinZip will not do multiple disks unless you put them on
a floppy, so I downloaded this. They are the originator
of the ZIP file.

scalione

----- Original Message -----
From: "Elliot Burke" <elliot@...>
To: "CAD_CAM_EDM_DRO" <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, April 22, 2002 12:07 PM
Subject: [CAD_CAM_EDM_DRO] re: more box ways


> Thanks to ballendo and George for the detailed enough answer to my vague
> questions.
>
> There are two machine tools in particular that seems most magical to me.
One
> does what they call deterministic microgrinding. The idea here is that
with
> a stiff enough machine and a relatively coarse grit diamond grinding tool,
a
> surface can be produced on glass or ceramic that is essentially polished
> with a very high form accuracy of a few nm.
> The other is the diamond turning lathe, which turns an aluminum or nickel
> surface also to a few nm finish and 10's of nm accuracy.
> There was quite a bit of open literature on this subject while these
things
> were in development a few years ago, now that the machines work they don't
> seem to be writing much about how they work.
>
> I have long wondering if there was any overlap between their mechanics and
> more conventional CNC machines.
>
> For example, a calculation was presented showing the limit in accuracy
> caused by the limited thermal conductivity of and high thermal expansion
of
> turcite/teflon. It was small but signficant on the nm scale for certain
> cutting profiles.
>
> Of course ways are only 1/3 the problem with these machines, spindles are
> another third, positioning and feedback the third.
>
> Elliot Burke
>
>
> Addresses:
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> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
>
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>
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>
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>
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