Wednesday, October 19, 2022

Astig fix #1 then #2

 I yanked the newly automated cooling unit out as I suspected uneven cooling was killing the mirror shape.  It did not seem to fix... onto #2...


Seeing was pretty poor for star tests last couple times I was out.  I had the scope out last night really just to test some fixes for my astigmatism.  Not sure you saw my last email or CN post in reflectors.  
 


My photo from 20221006 or 08; showing bad astig
 
 


My photo from 20221016 -pointing nearly to zenith and mildly out of collimation


 
I went through some changes like these…
 
There is a threaded slot in the rocker on the left of the below image that holds the cell to the rockers.  On the right cell has a bolt hole with 'rubber gasket' that protects stress of the bolt on the treaded rockers on the left.  .  I noticed the screw heads that shouldered in gaskets in place were making contact to the metal and caused some stress marks!



 
 
 
Added a screw bumper to bolts, in between the cell and rockers:
 

 
Placement

 
 
Installed



Hopefully this helps, more testing pending!!


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