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


There is always some scattering of light from a laser beam directed at the
surface.  I suggest you revert to the OLD way and inspect the surface with
a 10x or so magnifier with differing angles and types of light.  Any pits? 
A few? You're done.

Colin

-----Original Message-----
From: owner-atm{at}shore.net [mailto:owner-atm{at}shore.net]On Behalf Of Byron
Ader
Sent: Wednesday, April 30, 2003 11:28 PM To: atm-digest{at}shore.net
Subject: ATM Polish, polish...polish



When do you determine that you have polished for long enough?  I have
polished for quite some time and see results every time I polish for a half
hour (I have to re-cut my grooves every half hour).  I am starting with 1/4
inch grooves by width and depth.  I have read that you should not see any
hint of a focused beam on the surface. I want to verify that is correct,
because it is becoming difficult to see it but it is still there.  I have
had to re-poor my lap about 3 to 4 times and have had to cut grooves so
much that I have developed techniques for making it easier.  I now am
cutting my channels out with a peace of tin bent to form a knife that forms
a scoop.  I bevel the tip and file the edges so that they become sharp and
then I attach it to the tip of a soldering iron.  I can cut my grooves in
about 15-20 minutes this way (6"inch tool).

I can keep trudging on, but I want this mirror done!  I wont accept less
than the best that I can possibly make.

Thanks for your help.

--- BBBS/NT v4.00 MP