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phd2 alignment

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#1 danbelem

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Posted 07 August 2022 - 11:57 PM

For a couple years setup needed 20 North steps, same with West and at 30 min. good tracking. Now needs 40+/- steps and poor star images?



#2 michael8554

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Posted 08 August 2022 - 06:29 AM

So little to go on.

 

Mount ?  OTA ?  ST-4 or ASCOM guiding ?  OAG or Guidescope ? Guidecam  ?

 

What did you alter that changed the Cal ? 

 

Post two PHD2 GuideLogs showing the difference.



#3 kathyastro

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Posted 08 August 2022 - 06:36 AM

And where in the sky are you calibrating?  At high declinations, getting enough RA movement to calibrate requires some adjustments.



#4 danbelem

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Posted 13 August 2022 - 01:25 PM

ieq45pro, st4 guiding,asi 120 camera about 30deg up horizon. Graph shows DEC going off guide course. Cleaned cable also tried another cable, no change. I fear my 4 year old mount is losing dec communication.



#5 fmendes

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Posted 13 August 2022 - 01:39 PM

How many pixels? It's easy to configure PHD2 to cover the usual 25 pixels on a single step. PHD2 will complain, the calibration will be bad but it will try to guide.

 

Lately I set it up to cover only 20 pixels. Works the same as 25 for me. During tracking, rarely my guiding goes above 1 px.




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