Re: [ATM] Not tde or tue, important oblate spheroid, ellipsoid

["Jerry" <wa4guu@verizon.net>]

When you do the narrow W stroke make the length of the stroke about 1/3
diameter, and the width of the W something between 1/4 and 1/3 diameter.

What is the temperature in your work area?  How thick is the pitch at the
edge of the lap?

Jerry


-----Original Message-----
From: lütfü çakmak [mailto:lutfu_cakmak@yahoo.com] 
Sent: Monday, January 14, 2008 9:00 AM
To: Jerry; 'atm_list'
Subject: RE: [ATM] Not tde or tue, important oblate spheroid, ellipsoid

Hi Jerry,

I worked on my mirror yesterday as you described.

1- 15 minutes short stroke Center Over Center
   (half TOT, half MOT)
2- 15 minutes 1/4 - 1/3 diameter narrow W stroke.MOT
3- 15 minutes short stroke Center Over Center
   (half TOT, half MOT)
4- 15 minutes 1/4 - 1/3 diameter narrow W stroke.MOT

Of course tested while these combination of stroke. I
did not see starting to go back toward oblate and
going far from the sphere. But, it didn't improved in
my opinion. Tde is still remain on the edge maybe less
this time. And I have seen still there is a small
hole. Notwithstanding last time I did "The W Edge
Deepening Stroke" for 5 minutes, only to see what's
changing but it didn't change something.

I did not want to do something other than those
because I know, this phase of making mirror is very
important and I have to be careful.

Here is the last ronchi; 
 
http://www.atmlist.net/contrib/lutfu_cakmak-at-yahoo-dot-com/lutfu%201_13_20
08/

Best regards,

Lutfu





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