From: "Frank Q" 
To: "James P Crombie" ,
"Atm List" 
Reply-To: "Frank Q" 


Hi All

An excellent effort.

I have a question -- My recollections of grinding an 8" f/5 is that I
could excavate much more than 0.006" in a few hours - does anybody
else find this or is my memory rapidly failing?

(I used 80 grit and a full sized plate glass tool)

Cheers
Frank Q

----- Original Message -----
From: "James P Crombie" 
To: "Atm List" 
Sent: Wednesday, July 23, 2003 3:38 PM Subject: ATM Mirror Grinder pictures


>
> Hello all
> I did another couple of hours with the mirror grinding machine and got
> the sagita to .006"(this is with a 3.5" spherometer not overall ) or a
> ROC of  166" .   I thought I would start with something easy like
an 8"/f8
>
> http://www.jamescrombie.com/temp/closeupmirror1.jpg
> http://www.jamescrombie.com/temp/wideview1.jpg
> http://www.jamescrombie.com/temp/mirrorgrinder1.avi    (note 1.7mg)
> http://www.jamescrombie.com/temp/mirrorgrinder2.gif     (same as above
> but will open in browser window)
>
> --
> --------------------------------------------------------------------------
>
> James P Crombie
>
> Summerside      Machinist
> Prince Edward Island      Amateur Astronomer
> Canada      3D Designer
>
> E-mail      jpcrombie{at}pei.eastlink.ca
> Astronomy webpage      http://www.jamescrombie.com
> Rhinoceros 3D webpage      http://www.jamescrombie.com/rhino/
> Mirror Grinder page          http://www.jamescrombie.com/pics/
> --------------------------------------------------------------------------
>
>

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