From: "Russell Jocoy" 
To: atmpob{at}yahoo.com, atm{at}shore.net
Reply-To: "Russell Jocoy" 


>From: Dale Eason 
>Reply-To: Dale Eason 
>To: atm{at}shore.net
>Subject: ATM Can I use 120 grit to finnish hogging?
>Date: Mon, 14 Jul 2003 16:39:59 -0700 (PDT)
>
>
>Working on my 16" F5.
>
>I have a tile tool that has been broken in and matches
>the curve of the mirror as far as the sharpie test
>shows.  The mirror is everywhere a sphere according to
>my sphereometer.
>
>But the depth of the curve is only .185 inch and needs
>to be .195 (diameter is really 15 7/8. after the bevel
>is accounted for.)  I have run out of 80 grit.  Should
>I get more or should I proceed with 120 grit.  I have
>1.5 lbs of that.
>
>Dale Eason
>
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>


("atm{at}shore.net")

     Dale,

                      If you have grinded out to the edge, or close to it,
you a finished hogging. From your measures you will have no problems
getting 120grit to complete your depth. As a matter of fact keep your
strokes
semi-light  not to go deeper than you want. I think you should have gone to
120 earlier. You should be
OK just keep track of your depth while chasing pits. Sometimes while
getting rid of pits you can deepen
the sagitta when using the larger grits. If you are not to the edge of the
mirror it will all grind out. 80 grit is made to cut a hole..hopefully a
round one.  Some people start with 120, though it takes longer.


                                         just my thoughts... Russ Jocoy
("atm{at}shore.net")

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