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Guiding issues after the Meridian Flip-N.I.N.I-PHD2

Beginner Imaging Software EQ Astrophotography
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#1 Yeager17

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Posted 03 March 2021 - 01:24 PM

So I have just started imiging this week since the clouds broke. I am using N.I.N.A, PHD2 and Stellarium. The origanal problem was that everything is running well but when the automatic Flip starts NINA does all the steps correctly but once it starts to guide again the Dec seems to go out of wack and doesnt end up recovering. So I decised to enable the "reverse DEC output after the meridian flip". Which fixed the DEC but now the RA goes haywire and doesn't recover. I have not used the guiding assist yet since I was currently imiging.

Equipment

EQ6R Pro

ZWO ASI120 mm Guide Camera

N.I.N.A- PHD2

 

Would really like to figure this out before Friday so i can sleep most of the night before work.

 

Logs

 

https://openphdguidi...2_logs_KAxK.zip

 

Still trying to figure out how to upload the N.I.N.A log



#2 Jinux

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Posted 03 March 2021 - 01:45 PM

From the description, I guess you're using ST-4 cable for guiding. You may want to change it as ASCOM pulse guiding.

Once you setup PHD2 with it, NINA/PHD2 will take care of RA/DEC flip after meridian flip, so you don't have to do anything.

NINA will flip, centering, find new guide star and continue imaging.

Highly recommend to switch to pulse guiding. 

 

-Jinux


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#3 Yeager17

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Posted 03 March 2021 - 01:57 PM

ASCOM Pulse guiding is being used and NINA/PHD2 are taking care of all of that automatically. So I don't know what is happening after it starts to guide again and starts the next exposer.



#4 rgsalinger

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Posted 04 March 2021 - 12:20 PM

Just a guess but after you changed the setting (correctly) to reverse guiding on flips, did you recalibrate the mount? If you didn't perhaps you need to do so before guiding will work properly. Just a guess. 



#5 dghent

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Posted 04 March 2021 - 01:38 PM

This is likely not a NINA issue, and the EQ6R + EQMOD combination is a pretty popular combination amongst NINA users. I'm going to guess that you have a balance and backlash issue that is causing the dec axis to flop around.

 

First things first, have you followed and applied the advice from the PHD2 Best Practices guide? Have you looked over the Troubleshooting section in the PHD2 documentation?



#6 rgsalinger

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Posted 04 March 2021 - 07:47 PM

"but now the RA goes haywire and doesn't recover." is what he wrote. Just curious why you would suspect balance and backlash on the DEC axis causing the RA axis to misbehave.

 

Completely agree that the guide is always worth a read.

 

Rgrds-Ross



#7 dghent

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Posted 04 March 2021 - 08:42 PM

"but now the RA goes haywire and doesn't recover." is what he wrote. Just curious why you would suspect balance and backlash on the DEC axis causing the RA axis to misbehave


A hunch. New people with new gear not following best practices (he would have ran Guiding Assistant if that document was taken to heart). This usually means an incomplete description of the issue mixed with some misinterpretations of the results. This predicament comes from wanting to image before getting everything in order first. Pretty common.

At any rate I hope they will now check all of the balances, follow best practices, and run Guide Assistant and apply its recommendations, then report back.

#8 Yeager17

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Posted 05 April 2021 - 06:51 AM

I finally did get it fixed with some fiddling around in the settings, this was very helpful info. Thanks everyone for the input and guidance.




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