Re: ATM 10 inch f5.6 Polishing

["Sam Orawski" <orawski@lara.on.ca>]

----- Original Message -----
From: "Ryan Hess" <atmryan@excite.com>
To: <atm@shore.net>
Sent: December 29, 1999 10:14 AM
Subject: ATM 10 inch f5.6 Polishing


>
> Hi everyone,
>
> After a long move, I had several hundred email messages (37 pages) and I
was
> kicked off the list because me email limit was reached, and it was
bouncing
> the messages back.  Anyways, I have been working on my 10 inch mirror, and
> was ready to start polishing.  I tried to make a lap by casting strips,
but
> *nothing* worked.  It always stuck to something and broke.  I tried this
> twice with no luck, so I went to pouring a solid lap.  I cut the channels
> using a 40W soldering iron.  I was working on hot pressing yesterday (for
> several hours) with a huge no-contact area in the middle to show for it.
I
> had to cut the channels several times, but still no contact in 30% zone to
> center.  I have tried everything, including heavy weights and high temps.
> So, I just decided to start polishing.  Well, just as expected, it is
> superficially polished everywhere but the center(working TOT).  Should I
try
> to keep polishing, or go to pressing?  Are there any tricks to pressing
> **hard** laps?  I have been using Gugolz #73 softened with turpentine.
> Thanks,
>
> Ryan Hess
> Fellow ATM'er & Astrophotographer
> ----------------------------------------------------
> Sky Object Software's Website: <http://www.tcfb.com/skyobj>
> "You know you are addicted to amateur astronomy when your telescope weighs
> more than you do!"
>
>
>
>
>
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