Re: [ATM] Support for slumped mirror

["astro guy" <opticsguy@hotmail.com>]

Why not make up a nine-point cell for your mirror and use this as your 
support for fine grind, polishing, figuring???

Theoretically you could support the mirror with three points but a 
nine-point support is very easy and probably give you better results for 
generating your curves.

Kreig








>From: Jerry Dove <jldove1@cableone.net>
>To: atm@atmlist.net
>Subject: [ATM] Support for slumped mirror
>Date: Sun, 15 Jan 2006 14:27:22 -0700
>
>
>
>	Hi,
>	I've got an 8"x3/4" plate glass blank that Richard Schwartz (sp?) slumped 
>for me a few years ago. I haven't been
>able to work on it because of health and a couple of moves since then but 
>I'm finally able to get started on it again.
>
>	When I first started to do grinding on it, I made a hard plaster form to 
>hold it in place that was formed to fit
>the back and then had blocks wood around the edge to keep it and the form 
>from moving. But after all these years of
>watching the list I'm not sure this is the best way to do this.
>
>	Any advice on this would be most helpful,
>
>		Thanks,
>
>			Jerry Dove
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