[ATM] Re: polishing and figuring a 32"

["Mike Conran" <mike@guidesys.com>]

Bob May writes:

> 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
> bobmay@nethere.com
> http://nav.to/bobmay
> http://bobmay.astronomy.net 
> 
> _______________________________________________
> ATM mailing list http://www.atmlist.net/

Oh right!  The subdiameter tools ( especially small ones relative to the 
mirror diameter) can have substantial digging power so it is important to 
spread out the action by by the use of somewhat sweeping circular type 
strokes that spread the activity a bit and allow for good surface blending.  
Another moderating effect can be had by the use of a SOFT LAP on those small 
tools. 

Mike Conron 
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