To: atm{at}shore.net
From: tkrajci{at}san.osd.mil
Reply-To: tkrajci{at}san.osd.mil


>From: "Jerry B. Hillman" 

>Would someone please point me to a web site or whatever so that I can
learn
>to make a star lap.
>Working TOT with this 10" tool creates problems for every problem I solve.
>Primarily, if I polish off center, the inside edge of the lap digs a hole
in
>the center of the mirror.  If I polish COC, the center goes flat. The W
>stroke creates a rolled edge regardless of overhang.
>I am doing something wrong and all but the very newest links in the
archives
>are dead links. All I was able to find out is that a star lap makes it
>easier to parabolize a large mirror.

See: http://overton.tamu.edu/aset/krajci/ specifically:
http://overton.tamu.edu/aset/krajci/star-lap/star-lap.htm

The above page also talks briefly about subdiameter laps...which you may
find helpful.

Hope this helps,
Tom Krajci
Tashkent, Uzbekistan

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