Temperature-dependent Focus Compensation

Tuesday, December 4, 2018 1:35 PM

Problem(s) Encountered:

Started the night getting good focus and using the

temperature-dependent focus shift feature. I noticed midway through the night that the focus wasn''t great. So I disabled the feature and used the focus4k prospero procedure to find best focus again. While running focus4k, I noticed that the telescope wasn''t going to the values specified by prospero.  It was off by about the total amount that it had shifted (-35) using the focus shift feature before I disabled it. This was also true when I plugged in a focus value into the TCS.  I used the hand paddle to get to my new best focus and enabled the focus shift feature again. When I did this, it moved the focus by +35 and started doing it''s thing. I ended up disabling

the feature again, manually moving it back to the new best focus, and enabling it again. It behaved after that.


Temperature-dependent focus compensation has been thoroughly reworked.  System has been updated and appears to be functioning properly.