View Single Post
  #1  
Old 04-10-2015, 12:00 PM
lazjen's Avatar
lazjen (Chris)
PI cult member

lazjen is offline
 
Join Date: Dec 2012
Location: Flaxton, Qld
Posts: 2,064
PHD2 Polar Alignment issues

I use PHD2 for guiding but had not got around to seriously trying the polar alignment feature that it provides - drift align - until last night. I found a tutorial to try (https://sites.google.com/site/openph...rift-alignment) and over time I manage to get improvements - I think.

I could not get the red line to flatten very far at all, although the magenta circle became quite small. No matter what I did, the result was such that the RA was still jumping all over the place when guiding (+/- 2" easily).

I'm trying to work out why that was happening. I suspect the seeing has something to do with it, but trying with 1,3,5 sec guiding didn't seem to make much difference.

Would backlash cause this? What about the aggressiveness setting - I did have it at 100?

Finally, DEC seemed to be quite good compared to RA - hardly any movement.

My setup for this is as per my sig. I was at 2000mm - no reducer.

Thanks for any suggestions/help.

EDIT: I guess I should ask what information I could attempt to gather tonight that might assist in working this out? Is there anything I could try to eliminate some variables?

Last edited by lazjen; 04-10-2015 at 12:14 PM. Reason: More questions
Reply With Quote