Re: ATM Re: [atm_free] Stubborn 1/2 " edge zone

["Jeff Anderson-Lee" <jandersonlee@sbcglobal.net>]

> If the inner zone is shorter, then you aren't working the outer zone even
> with the TOT and that means that you are going to have to work the outer
> parts of the mirror with the lap with a more chordal stroke otherwise the
> center will work out to near the edge and you will have a TDE that will
take
> a while to work out.

The outer zone is the long one, thus a have a central hole in the mirror
(and hill on the lap). (Sorry, I forgot to specify.)   I machine polished
the mirror for a while half  TOT and half MOT with the two zones as a
result.

> Sometimes I will take a small lap (maybe 1" or so) and work the high area
> all by itself to get it down to where the full lap can smooth things out.
> Hope this helps.  If anybody else knows anything better to do, advice is
> always welcome to give their opinion on this one.

I suspect that using the full lap in a chordal stroke combined with a lot of
pressing might do the trick  That will work the hill on the tool against the
hill on the mirror.  Then back to 1/3 COC to finish off.

Jeff