#1  
Old 08-09-2020, 02:19 PM
neurosis3000 (Reggie)
Registered User

neurosis3000 is offline
 
Join Date: May 2020
Location: Perth
Posts: 104
PHD2 graph question

Hi all
Apologies for another noob question:

My guiding graph in the ASIAIR app which is similar to PHD2, the blue(RA) line is roughly along zero which seems about right.

The red(DEC) line tracks along the -2” line. Stars seem mostly round but obviously can be improved.

As per my earlier post, I strongly suspect polar alignment.

So if the RA line is good but DEC line is tracking along the -2 then which axis should I adjust?

Sorry forgot to take a screenshot! 😅

Cheers,
Reggie
Reply With Quote
  #2  
Old 12-09-2020, 09:20 AM
PKay's Avatar
PKay (Peter)
Registered User

PKay is offline
 
Join Date: May 2017
Location: DEPOT BEACH
Posts: 1,643
Hi Reggie

Sorry about delay in responding, have been working away.
Adjust mount Azimuth for Declination error.
Adjust mount Altitude for RA.

When checking the DEC error, best to point the scope near the meridian and the equator.
When checking RA error, point the scope near the equator and low toward the West (or East) horizon.

For more information try reading PHD2 drift alignment procedure. I know you are not using PHD2, however the information is still relevant.
Reply With Quote
  #3  
Old 14-09-2020, 06:06 AM
neurosis3000 (Reggie)
Registered User

neurosis3000 is offline
 
Join Date: May 2020
Location: Perth
Posts: 104
Thanks, Peter!

That info is a great help!😃

Cheers,
Reggie
Reply With Quote
  #4  
Old 14-09-2020, 08:05 AM
RyanJones
Registered User

RyanJones is offline
 
Join Date: Jun 2018
Location: Melbourne,Australia
Posts: 1,439
Hi Reggie,

May I suggest that check you haven’t got “ no dec “ or “ north only “ checked on the left hand side just above the graph. Even if your PA is slightly out, it shouldn’t just run along the -2 line it should be constantly trying to correct for the error. If you have good PA then a small movement in backlash could make it go out to -2 but with no guide correction in Dec will cause it to stay there. Also the ASIAIR has a PA routine, you should try it, it’s fantastic and really speeds up the whole process.

Cheers

Ryan
Reply With Quote
  #5  
Old 14-09-2020, 09:31 AM
neurosis3000 (Reggie)
Registered User

neurosis3000 is offline
 
Join Date: May 2020
Location: Perth
Posts: 104
Hi Ryan,

I’ve tried the routine plus other methods but unfortunately I have no view of the SCP and my view of the SE, S and SW obscured up to about 35° high so the routine doesn’t seem to work. 🤪

The only thing I haven’t tried yet is drift alignment!

But thanks for all the info. Will definitely try anything I can and once it’s finally polar aligned I’ll leave it in place and only take the OTA in at the end of the session. 🤣
Reply With Quote
  #6  
Old 14-09-2020, 09:35 AM
RyanJones
Registered User

RyanJones is offline
 
Join Date: Jun 2018
Location: Melbourne,Australia
Posts: 1,439
Quote:
Originally Posted by neurosis3000 View Post
Hi Ryan,

I’ve tried the routine plus other methods but unfortunately I have no view of the SCP and my view of the SE, S and SW obscured up to about 35° high so the routine doesn’t seem to work. 🤪

The only thing I haven’t tried yet is drift alignment!

But thanks for all the info. Will definitely try anything I can and once it’s finally polar aligned I’ll leave it in place and only take the OTA in at the end of the session. 🤣
Agghh. That’s frustrating . The challenges we face eh
Good luck with it
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 11:26 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Advertisement
Testar
Advertisement
Bintel
Advertisement