Jump to content
  • Join the online East Midlands astronomy club today!

    With active forums, two dark sites and a knowledgeable membership, East Midlands Stargazers has something for everyone.

Experimental drift alignment.


andyboy1970
 Share

Recommended Posts

Experimental drift alignment.


Since my mount is on a pier it is already roughly polar aligned but it still needed a little tweak so I fired up Cartes and PHD.


Slewed  the scope to Denebola which was near the meridian at the time and not to high up.


Calibrated  PHD on Denebola.


Next in PHD I disabled the guide outputs, in the brain function, and enabled the graph.


Click PHD to guide on Denebola and watched the graph for DEC output only for 1 minute.


The trace for DEC slowly drifted down away from the centre line so I slightly adjusted the Azimuth adjusters and restarted the guiding after several runs like this I had the DEC trace running all the way across the graph right near the centre line.


Next I slewed  to a star next to M3 which was fairly low (for me) on the East horizon and recalibrated PHD.


Next in PHD I disabled the guide outputs, in the brain function, and enabled the graph.


Click PHD to guide on the selected star and watched the graph for RA output only for 1 minute.


The trace for RA also slowly drifted down away from the centre line so I slightly adjusted the ALT adjusters and restarted the guiding after several runs like this I had the ALT trace running all the way across the graph right near the centre line.


I ran through this process twice and now have a very well aligned mount.


Note: only small adjustments were made each time.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.