Re: [ATM] fishing for a lil polishing advice!

[Mike Lockwood <melockwo@uiuc.edu>]

Hi,

Anthony Anconetani wrote:
> You make the point that I almost expect TDE. Hehehe... Yeah, I
> guess I do. It's just that TDE seem to get a lot of discussion. It
> seems to happen to many beginners.

Really what happens a lot of the time is they create an oblate sphere
condition that causes a TDE to develop.

> And, it appears to be fairly time consuming to remove. Hence my
> desire to catch it early correct my technique. In honesty, I need
> to re-read some material before starting the find grinding process.
> But since the topic is warm, is there something in particular to
> pay attention during fine grinding so as not to grind in a TDE?

Just keep it spherical through fine grinding.

This discussion inspired me to update the fine grinding section of my
full-size lap web page.
http://bi-staff.beckman.uiuc.edu/~melockwo/mirror_making/full_lap/full_lap.html

Look under section 0.1, Fine Grinding, for some tips.  There is no
excuse for not coming out of 5u with a beautiful sphere and a perfect
grind.

After that, read my oblate sphere page:
http://bi-staff.beckman.uiuc.edu/~melockwo/mirror_making/oblate/oblate.html

If you avoid the pitfalls mentioned on those pages, you'll probably be
ahead of the game.

	Mike Lockwood

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