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New mount, guiding problems

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#1 3I0HSSV

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Posted 26 May 2023 - 10:50 AM

I set up a new mount earlier this week and am having significant guiding issues and am not sure where to begin trouble shooting them. To start I am using a polemaster to do my polar alignment and the mount is level. I am getting an Orthogonality Error of 88.6, see attached. I ran the GA a few times and accepted its suggestions. PHD2 is telling me I have a cable snag or my alignment is off, neither of which is true. Can anyone give me some guidance as to where I should start on my next clear night with the troubleshooting?

 

 

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#2 dhkaiser

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Posted 26 May 2023 - 01:55 PM

What mount?

 

How much does your telescope with everything mounted weight?

 

Is it balanced properly?



#3 3I0HSSV

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Posted 26 May 2023 - 02:01 PM

What mount?

How much does your telescope with everything mounted weight?

Is it balanced properly?


It is a Nyx Mount. Everything together weights about 15 pounds. I balanced it on the dec axis per the manual.

#4 dhkaiser

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Posted 26 May 2023 - 02:28 PM

It is a Nyx Mount. Everything together weights about 15 pounds. I balanced it on the dec axis per the manual.

Balanced on RA axis?

 

Oh I see that is a Harmonic Gear Mount and ra balance is difficult.

 

Not sure what your problem is.


Edited by dhkaiser, 26 May 2023 - 02:37 PM.


#5 larryjh

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Posted 26 May 2023 - 04:51 PM

Looks like you did calibration at or near DEC=90.  That won't work and I think is the cause of the problems.  PHD2 should have given you a warning.  You need to do calibration near to DEC=0 and the meridian.


  • rgsalinger and 3I0HSSV like this

#6 michael8554

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Posted 27 May 2023 - 04:56 AM

As Larry said.

 

Have you read the PHD2 Instructions ?

 

Here's a starter from the PHD2 guys:

 

https://openphdguidi...best-practices/

 

Focus is poor  HFD = 6.21 px

 

Use the reading in the Star Profile tool to minimise this.




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