Re: [ATM] Not tde or tue, important oblate spheroid, ellipsoid

["lütfü" "çakmak" <lutfu_cakmak@yahoo.com>]

Hi Jerry,

I agree with you. Already I have worked for about 5
months on this mirror. One time I had to returned to
fine grinding. It is a training mirror for me.
Actually I will make a 10" for planets and a 15" for
deep sky. 15" blank is ready for grinding and I have
waited 10" pyrex blank from a my frend will to send
from USA.

After 30 + 15 min. the big W stroke + 15 min. the big
W stroke using rouge here is ronchi;

http://www.atmlist.net/contrib/lutfu_cakmak-at-yahoo-dot-com/lutfu_1_12_2008/

I think my mirror returned to shpere, but a litte bit
a hill still remain and there is a little bit TDE on
the edge, for my part.

Well, afterwards what is your suggestions. 

Unfortunately I have not yet a foucault test device.
Surely I will have to make one.

Best regards,

Lutfu


--- Jerry <wa4guu@verizon.net> wrote:

> You could finish that quickly. But it usually
> doesn't happen that fast.
> Maybe it will happen this time. If it doesn't, be
> patient and look at the
> bright side. You will learn more if you have to
> fight for it and it takes
> longer. If you finish this weekend you will just
> have to learn more on the
> next mirror.
> 
> Show me some pictures of your progress. I have seen
> your Ronchi images. Can
> you Foucault test? Do you have a mask to test zones?
> If so tell me the
> dimensions. 
> 
> Jerry
> 
> -----Original Message-----
> From: lütfü çakmak 



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