From: "David M. Bourgeois" 
To: ATM shore 
Reply-To: "David M. Bourgeois" 


You might be right there, but it seems to me to be overkill with standard
glass (1:6). However, with a concave spherical back its definitely going to
have to be supported somehow. I was thinking of making a plaster tool,
grind the back with that, and then use the tool to support. This would mean
two tools, one for the front and one for the back. (Actually, I would do
most of the grunt work with a hand rig for a diamond saw blade, and THEN
make a tool for the back.  No power tools available to me. See previous
posts by Suzy Jackson on that topic.)

I would appreciate feedback from someone who has taken this route (concave
back + dewedging). Failing that, I'll try my best....

On Sat, Jan 18, 2003 at 05:16:33PM +0100, Vladimir Galogaza wrote:
> According to the recent postings* to the list it seems that the best way to
> support the
> mirror for grinding , polishing and testing is to support it in its
> flotation cell.
> Everything else is more or less good approximation giving usually good
> results but sometimes causing  unexplained ( unexpected) problems.
> ( The thinner the mirror the more pronounced are support problems.)
>
>
> I would appreciate very much list opinion and comments  on this.
>
> *  Martti Koskimo, James Burrows and many other.
>
> Regards
> Vladimir.
--
David Bourgeois  -->dbourgeo{at}thezone.net http://home.thezone.net/~dbourgeo/
#  "Research is what I am doing when I don't know what I am doing."
#  - Wernher von Braun

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