[ATM] 6" F4.5 Figuring Question

["Jason Lehmann" <jtravel@bellsouth.net>]

Hi All,

I have been working on a 6" f4.5 mirror and I am having trouble parabolizing
it.  I'm using a full size lap and it doesn't seem to want to go past a
sphere no matter what stroke I use.  The substrate is quartz so I know it
will move slower than pyrex but the figure still seems to be stuck.  What is
the best way to make progress in my situation?

Thanks,

Jason


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