Re: [ATM] Polish / figure question

[=?Windows-1250?Q?Attila_Schn=E9?= <yolo@chello.hu>]

Wednesday, January 4, 2006, 6:54:43 PM, you wrote:

jh> Hello to everyone,

jh> I have a quick question and before I proceed I would like some input as to a
jh> direction.  I have ground out 2 mirrors for a bino scope.  Mirror a and
jh> mirror b, both 12" f/5.097.  I have used one tool to make both mirrors and I
jh> am now at the polishing stage (excitment building here).  Would it be good
jh> to polish one mirror out and then the other mirror out before figuring,
jh> or.......... polish for one hour on mirror A and then one hour on mirror B
jh> continuing the altering processess until both are polished out completely.
jh> I understand that figuring of course would be one mirror at a time.  I am
jh> using a full size lap gou 64,  room temp is about 70 degrees where I will be
jh> polsihing.

jh> thanks to everyone for making this an enjoyable list to belong to.

jh> Clear skys,
jh> charles


jh> _______________________________________________
jh> ATM mailing list http://www.atmlist.net/

Hello Charles,

There is only one reason to give a quick polish to both mirror in the
same time. And that is to check the correct focal lenght, because in a
bino scope both objective has to have the exactly same focii. So I
think it is a good idea to flash polish both mirror just to check the
focii and if they are the same, then polish one and than the another
one.Specially if you
don't have a machine wich is able to work on two or three mirror in
the same time(like mine, three mirror, 16" each).
And than figuring. If the focci are not identical than maybe you have
to regrind using the last stage of emery.


-- 
Regards
Attila Schné
                          mailto:yolo@chello.hu

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