From: "CSC" 
To: "Atm" 
Reply-To: "CSC" 


Maybe I missed a previous post, but how long have you been polishing? I'd
say a 12 " can use plenty of pressure and can be a workout.  10 hrs
isn't too much for a good polish.

Rough up the lap with a wire brush or make a new one.  Use net to raise the
action on the lap.

If you feel the scratches need to go, go back to 12 micron.  5 doesn't seem
to remove much glass at all, and I've always had to go to 12 micron.  Saves
time.

Colin

-----Original Message-----
From: owner-atm{at}shore.net [mailto:owner-atm{at}shore.net]On Behalf Of Scott
Berfield
Sent: Thursday, April 17, 2003 12:23 PM To: atm{at}shore.net
Subject: ATM Polishing



I am getting a little frustrated and need some advice. I Seem to be making
VERY slow if any progress on getting the 12" to fully polish out. I
think I need to go back to fine grinding to reduce some of the remaining
pits (which seem suspiciously deep) and to get rid of a couple of small
scratches I managed to pick up despite my best efforts. I am considering
going to 5 micron and maybe even trying for 3 before proceeding back to
polishing.

I also am considering going to pads to polish with to make up some of the
time lost. I have never used pads and wanted to get some advice on a source
and on the proper use.

As I understand it the pads are applied to the surface of the tool and
charged with polishing slurry then polishing proceeds the same way as if
you were using a pitch lap - correct? Does one need to use a different
stroke pattern or are there other concerns to be aware of?

Thanks for all the help on this - who knew a piece of glass could be so humbling?

------------------------------------------------------
Make no little plans; they have no magic to stir men's blood.
- Daniel Burnham

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