Re: ATM Alternative tools?

[Andrew Grisdale <roadwarrior@techieguy.com>]

On Fri, 10 December 1999, "Frank Ward" wrote:

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> Subject: Re: ATM Alternative tools?
> From: "Frank Ward" <thewards@mindspring.com>
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> 
> Andrew,
> 
> Your questions are both incisive and accurate. In each case you answered
> your own question with an accurate reply!
> 
> Widespread use of ceramic faceted tools is just beginning  (late 90's)
> therefore no
> widely circulated books have published the info yet.
> 
> The archives for this list hold all the information you need to make one.
> Remember, if you will, that within our activity this List is usually on the
> >cutting edge< of new or improved methods of working glass.
> 
> The preshaped metal tools cost $30.00-50.00 but can be used many times
> just the way you listed. A ceramic tool cost $5.00 and can be used many
> times
> also, if it is made to the curve achieved after hogging.
> 
> It is traditional to make another tool for polishing, one faced with pitch.
> Since
> most mirror makers only made their own personal mirror they used their tool
> covered with pitch for this section.  We who make several mirrors make
> different laps.  Sometimes several laps for the same mirror, remember they
> mold to the shape of the mirror.
> 
> You can't beat the combination of a pre-generated curve in a blank and a
> metal tool that matches that curve. Makes life and work much easier.  But
> you pays for what you gets.  Follow your budget....if you don't have one
> then we need to get to know each other better!!
> 
> Since the area of the tool and the area of the blank both deform while
> grinding
> I would not personally use an oversize tool.  Too much area to remove to
> form
> the curve on the blank.
> 
> Frank Ward
> Atlanta, GA
> 
>  > Is there any reason why I should not use a preformed larger diameter
> tool? Not too much bigger, say I make a 6" on an 8" tool?
> >
> > Thank you all for any help you can give,
> >
> > Andrew G.
> >
> >
> > _______________________________________________________
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Thanks Frank,

I was considering getting one of the 6" ally tools from ...
http://user.mc.net/arf/atools.htm
$15 plus $7 to have it turned spherical seems like a good deal. I might try looking for 
an old aluminum pan with a thick bottom though, and fill it with plaster for stability 
and try that.
In regard to steel faced tools I was looking at ...
http://www.aao.gov.au/local/www/sl/dumps.html
The guy "Steve Lee" who wrote the page seems to think that the rusting of the tool is a 
disadvantage, but I thought it might be to a certain extent free grit for some stag
es.

My budget is kind of slim to non-existant, I can probably find $30 every couple of months 
to order something, other than that, it's pocket change for what I can find locally. My 
blank is probably going to end up being 10mm plate glass because that is what I can get 
hold of, don't think I should go bigger than 6" on that.

I will try searching the archives for more info in ceramic tools, when the search feature 
is fixed.
I realised after posting that a larger than mirror tool is pretty much worst case for a 
hard tool/regular glass pair.

Thanks again, steady hands and steady skies!

Andrew G.


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