Re: [ATM] Ball Scope First Light

[Jason Hissong <jhissong@gmail.com>]

Dale,

Yes, I have to go back and re-read it. I have read them before but as 
soon as I flip things over (from IROC to OROC) I get confused.  My 
interpretation of this ronchi image is that the edge is slightly tilted 
up (too much correction?) and the center has a hill.  I need to work the 
center zone (later) but I have to get the edge out right and meet in the 
middle.

Or...

Work the center until it meets up with the edge...

Jason

Dale Eason wrote:

>The following site will help you understand your
>ronchii images.
>
>
>http://www.atm-workshop.com/ronchi-test.html
>
>
>Dale Eason
>
>--- Jason Hissong <jhissong@gmail.com> wrote:
>
>  
>
>>Bob,
>>
>>Here is the latest Ronchi image of the mirror.  I
>>did go around the 
>>barrel with COC chordal strokes with tool on top.  I
>>may have it wrong 
>>in regards to the TUE?  There is definately
>>something going on with the 
>>edge (or the outer zones.)  The center of course
>>needs some work.. but I 
>>want to make sure I get the edge taken care of
>>first.
>>
>>Outside radius of curvature.
>>
>>    
>>
>http://www.undermidnight.com/images/atm/parabola_oroc.jpg
>  
>
>>Thanks
>>
>>Jason
>>
>>Bob May wrote:
>>
>>    
>>
>>>A turne up edge can easily be fixed with the mirror
>>>      
>>>
>>on the bottom
>>    
>>
>>>and a few chordal strokes to bring it down.  Don't
>>>      
>>>
>>do many
>>    
>>
>>>strokes as you can easily go too far.  You're
>>>      
>>>
>>probablly in the 5
>>    
>>
>>>to 10 strokes per session range, depending upon how
>>>      
>>>
>>fast your lap
>>    
>>
>>>is working.
>>>Bob May
>>>bobmay at nethere.com
>>>http: slash /nav.to slash bobmay
>>>http: slash /bobmay dot astronomy.net
>>>Replace the obvious words with the proper
>>>      
>>>
>>character.
>>    
>>
>>>_______________________________________________
>>>ATM mailing list http://www.atmlist.net/
>>>
>>> 
>>>
>>>      
>>>
>>-- 
>>
>>"A long journey starts with the first step and an
>>understanding spouse."
>>http://www.undermidnight.com - astronomy and
>>astrophotography
>>http://www.n8xe.com - ham radio
>>http://www.jasonhissong.com - electronic music
>>composition
>>
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>>
>>    
>>
>
>
>
>	
>		
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>  
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-- 

"A long journey starts with the first step and an understanding spouse."
http://www.undermidnight.com - astronomy and astrophotography
http://www.n8xe.com - ham radio
http://www.jasonhissong.com - electronic music composition

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