Re: ATM A Very Bad Day

["Janik Zikovsky" <jzikovsky@hotmail.com>]

The chip is so bad that the back face is also affected, not as much as the 
front, but I wouldn't gain much by grinding the back.

One concern is whether the chip would affect the figuring... Say the mirror 
has a turned edge, would I end up with a turned edge around the chip? Would 
the slightly different mass in that area cause problems while the glass is 
reaching thermal equilibrium?




>       I feel your pain, so bad it made me cringe to read your post.
>  I haven't had your experience, but you might consider grinding the
>face flat again and starting over .  With that large of a chip, I
>think I might consider that option.    Good luck on what ever you
>decide to do and Happy Holidays.
>
>                       Jerry


>From: jdo348@earthlink.net (Jerry Dove)
>To: "Janik Zikovsky" <jzikovsky@hotmail.com>
>Subject: Re: ATM A Very Bad Day
>Date: Thu, 30 Dec 1999 20:03:33 GMT
>
>On Thu, 30 Dec 1999 14:37:44 EST, you wrote:
>
>
> >Do I :
> >
> >a) Give up ATMing and become a tibetan monk?
> >b) Finish the mirror anyway, and use it knowing that i'm losing 8% of the
> >light?
> >c) Finish the mirror, but plan the telescope mount big enough to fit a 
>10"
> >mirror, that I could make later on?
> >d) Put the broken mirror somewhere visible as a cautionary example, and 
>make
> >another mirror?
>
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