Mouthpiece Work / how falt is flat?
FROM: msausville (msausville)
SUBJECT: how falt is flat?
People, Everybody says flat. Does anyone know machinists define flat and how they measure it? I have a granite stone (from Lee Valley, thanks for the pointer, group). It came with a certificate that says it's flat to a ten-thousandth of an inch. How they heck do they establish that? Certainly not by pointing it at a light and sighting down it or other handy techniques, I assume. Somebody edicate me, please! Thanks, M.
FROM: msausville (msausville)
SUBJECT: Should be "HOW FLAT IS FLAT?" not "how falt is flat?"
reflexes got the better of me. Hee, hee. M. --- In MouthpieceWork@yahoogroups.com, "msausville" <saus@...> wrote: > > People, > > Everybody says flat. Does anyone know machinists define flat and how > they measure it? > > I have a granite stone (from Lee Valley, thanks for the pointer, > group). It came with a certificate that says it's flat to a > ten-thousandth of an inch. > > How they heck do they establish that? Certainly not by pointing it at > a light and sighting down it or other handy techniques, I assume. > > Somebody edicate me, please! > > Thanks, > > M. >
FROM: kymarto (kymarto123@...)
SUBJECT: Re: how falt is flat?
I think they use laser interferometry.
Toby
msausville <saus@...> wrote: People,
Everybody says flat. Does anyone know machinists define flat and how
they measure it?
I have a granite stone (from Lee Valley, thanks for the pointer,
group). It came with a certificate that says it's flat to a
ten-thousandth of an inch.
How they heck do they establish that? Certainly not by pointing it at
a light and sighting down it or other handy techniques, I assume.
Somebody edicate me, please!
Thanks,
M.
FROM: bradbehn (Brad Behn)
SUBJECT: Re: Should be "HOW FLAT IS FLAT?" not "how falt is flat?"
Actually it is amazing how informative light can be. http://www.msi-viking.com/optical_comparator/
msausville <saus@...> wrote: reflexes got the better of me. Hee, hee.
M.
--- In MouthpieceWork@yahoogroups.com, "msausville" <saus@...> wrote:
>
> People,
>
> Everybody says flat. Does anyone know machinists define flat and how
> they measure it?
>
> I have a granite stone (from Lee Valley, thanks for the pointer,
> group). It came with a certificate that says it's flat to a
> ten-thousandth of an inch.
>
> How they heck do they establish that? Certainly not by pointing it at
> a light and sighting down it or other handy techniques, I assume.
>
> Somebody edicate me, please!
>
> Thanks,
>
> M.
>
---------------------------------
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FROM: bradbehn (Brad Behn)
SUBJECT: Re: Should be "HOW FLAT IS FLAT?" not "how falt is flat?"
http://en.wikipedia.org/wiki/Optical_comparator
http://www.jlmetrology.com/
Brad Behn <bradbehn@...> wrote:
Actually it is amazing how informative light can be. http://www.msi-viking.com/optical_comparator/
msausville <saus@...> wrote: reflexes got the better of me. Hee, hee.
M.
--- In MouthpieceWork@yahoogroups.com, "msausville" <saus@...> wrote:
>
> People,
>
> Everybody says flat. Does anyone know machinists define flat and how
> they measure it?
>
> I have a granite stone (from Lee Valley, thanks for the pointer,
> group). It came with a certificate that says it's flat to a
> ten-thousandth of an inch.
>
> How they heck do they establish that? Certainly not by pointing it at
> a light and sighting down it or other handy techniques, I assume.
>
> Somebody edicate me, please!
>
> Thanks,
>
> M.
>
---------------------------------
Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.
---------------------------------
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FROM: keith29236 (Edward McLean)
SUBJECT: Re: Should be "HOW FLAT IS FLAT?" not "how falt is flat?"
--- In MouthpieceWork@yahoogroups.com, Brad Behn <bradbehn@...> wrote: > > http://en.wikipedia.org/wiki/Optical_comparator > > http://www.jlmetrology.com/ > > Brad Behn <bradbehn@...> wrote: > Actually it is amazing how informative light can be. http://www.msi-viking.com/optical_comparator/ > > msausville <saus@...> wrote: reflexes got the better of me. Hee, hee. > > M. > > --- In MouthpieceWork@yahoogroups.com, "msausville" <saus@> wrote: > > > > People, > > > > Everybody says flat. Does anyone know machinists define flat and how > > they measure it? > > > > I have a granite stone (from Lee Valley, thanks for the pointer, > > group). It came with a certificate that says it's flat to a > > ten-thousandth of an inch. > > > > How they heck do they establish that? Certainly not by pointing it at > > a light and sighting down it or other handy techniques, I assume. > > > > Somebody edicate me, please! > > > > Thanks, > > > > M. > > > If you haven't seen the light, you cannot falt the flatness ! > > > > > --------------------------------- > Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. > > > > > --------------------------------- > Looking for last minute shopping deals? Find them fast with Yahoo! Search. >