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PHD2 issue I can't figure out

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#1 fetoma

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Posted 25 August 2019 - 11:57 AM

My guide star keeps randomly "popping out" of the crosshares spiking in DEC only. Anyone see anything like this? I captured it in the screenshot below. I have the guidelog, but it's a 8mb file. I was imaging the Veil with my 183MM capturing OIII with (15) 5 minute subs.

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#2 PirateMike

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Posted 25 August 2019 - 12:06 PM

It doesn't look like you need the dec aggression to be 100.

 

 

Miguel   8-)

 

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#3 Jim Waters

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Posted 25 August 2019 - 01:14 PM

It would help if you post more information.......  Mount, guide scope / camera, OAG or piggyback and your PHD Log files.

 

 

EDIT - Just saw that you are Dithering.  Do you understand how Dithering work?


Edited by Jim Waters, 25 August 2019 - 01:32 PM.


#4 fetoma

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Posted 25 August 2019 - 02:15 PM

It would help if you post more information.......  Mount, guide scope / camera, OAG or piggyback and your PHD Log files.

 

 

EDIT - Just saw that you are Dithering.  Do you understand how Dithering work

 


Yes, it's not a dither. CGEM-DX mount, FS-60 guidescope with a QHY5L-II mono guider via ASCOM to the mount. Link to log below.

 

https://drive.google...-tlXzIluN-iXv0U



#5 kathyastro

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Posted 25 August 2019 - 03:36 PM

Something is moving.  Either there is backlash in Dec that hits more or less randomly in response to random things like cable pulls, or there is flex in the guide scope mount that responds to things like gravity or cable pulls.



#6 fetoma

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Posted 25 August 2019 - 03:41 PM

Something is moving.  Either there is backlash in Dec that hits more or less randomly in response to random things like cable pulls, or there is flex in the guide scope mount that responds to things like gravity or cable pulls.

Thanks Kathy, I'll take a closer look at my setup, but I'm almost certain everything is solid.




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