Re: [ATM] After a layoff of 3 yrs or so.............

[Mike Lockwood <melockwo@uiuc.edu>]

John,

John and Bernadine Murray wrote:
> 	After a year of three of lurking and not much else, the bug has
> bitten again. I dug the old machine out and dusted the majority of dust off
> it. We decided to throw a mates 8" piece of glass that had 2 hours of hand
> polish onto the machine. After 7 hours or so the result was the same as it
> had always been. The edge from 80% on out was out of control. I then thought
> about varying the sweep, overhang and stroke length every 10 minutes or so.
> The results are the best we've seen using the machine. Manuel wants to
> figure it by hand using a full size lap. Any suggestions as to how to
> approach this and what strokes? All suggestions considered. We have both
> decided it would be nice to finish this mirror before we take another long
> beer break.......!!

You say you want to figure your 8" mirror by hand using a full size 
lap?  If it's F/4.5 or slower, I've got just the document for you:

http://bi-staff.beckman.uiuc.edu/~melockwo/mirror_making/full_lap/full_lap.html

	Mike Lockwood

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