Re: [ATM] Problem? when grinding with machine : Correct URL

["Geoff Nelson" <gjnelson@absamail.co.za>]

Hi Ken 

That was the old machine. Worked well got good spherical  surface 
with that. When I rebuilt the machine at the top of the page is when 
I got the problems.

I have thought of one thing that could be the issue and that is I am 
not supporting the mirror sufficiently with it on top of the tool.

I am going to turn it over and add a thicker support for the tool and 
see how it goes.

Thanks for the help

Geoff

Date sent:      	Wed, 17 Mar 2004 15:06:35 -0800 (PST)
From:           	Ken Hunter <atm_ken_hunter@yahoo.com>
Subject:        	Re: [ATM] Problem? when grinding with machine : Correct URL
To:             	Geoff Nelson <gjnelson@absamail.co.za>
Copies to:      	atm@atmlist.net

> Geoff...
> 
> If you look at the GIF of your machine in action,
> you'll see that each stroke passes through the center
> of the mirror in each direction while it only hits the
> edge (of any particular mirror area) every 4 or so
> strokes. 
> 
> Therefore, the center will get a LOT more grinding
> action than the edges. You can also get bigger pits
> near the edge if you just add abrasives while the
> machine is running. The abrasives have to break down
> to get into the center so they of course leave smaller
> pits there.
> 
> Ken Hunter
> 
> 
> --- Geoff Nelson <gjnelson@absamail.co.za> wrote:
> > 
> > > I cannot log on to your site to see the machine
> > but here goes.
> > 
> > Sorry the URL is
> > 
> > http://myweb.absa.co.za/gjnelson/
> > 
> > Thanks
> > 
> > Geoff
> > _______________________________________________
> > ATM mailing list http://www.atmlist.net/
> 
> 
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