Re: [ATM] polishing and figuring a 32"

[lsayre <lsayre@neo.rr.com>]

Bob May wrote:
> 
>> You've got better muscles than me!  I'd never consider tryting to
>> move a 30" or so tool about on a mirror without assistance. When
>> doing subdiameter work, many people seem to not realize that there
>> is indeed a need to somewhat evenly spread the rubbing of the two
>> pieces together is needed to be done.  The thing here is that the
>> glass is removed (not moved around) at a pretty constant rate and
>> that the polishing needs to be done in that fashion or the surface
>> gets to be rather odd. Bob May
> 

I herniated my navel attempting to hand polish a 30" f/~4.1 Pyrex mirror
with a 20" pitch lap.  Particularly when the polish began to develop,
and contact between the tool and the lap was excellent, I was using
about all the energy I could muster to move the tool back and forth
across the mirror, using a basic 'W' stroke.  Then pop!  After surgery and
a period of healing, I completed the polishing with a machine.

Lawrence Sayre
---
My philosophy, in essence, is the concept of man as
a moral being, with his own happiness as the moral
purpose of his life, with productive achievement as
his noblest activity, and reason as his only absolute.

Ayn Rand (in the appendix to 'Atlas Shrugged')
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