View Single Post
  #24  
Old 19-08-2009, 09:20 PM
darrellx's Avatar
darrellx (Darrell)
Registered User

darrellx is offline
 
Join Date: Dec 2007
Location: Kulgun, Queensland
Posts: 278
Hi All

It looks like I may have worked this out at last. After a false start with the clouds, things have cleared and I got the chance to use the illuminated reticle.

After only a few adjustments, I think I now have the Dec alignment spot on.

James, thanks for the instructions. It has worked well.
I centred the star; advanced the RA axis to set the diagonal lines(cross hairs?). Let it drift; did the adjustment (rotated the mount base on the tripod). And yes, it does work better with the tracking on.

For the last 20minutes the star hasn't drifted outside the double lines. Beautiful.

However...... there is always a but. The star has been drifting down the RA axis. The mount is outpacing the star movement. In the 12mm reticle it looks like it will take just under an hour or so to drift outside the field of view.

I can understand the Declination drift. I now understand how to compensate. But can anyone suggest a cause for drift like this in RA and how I might correct it?

Thanks
Darrell
Reply With Quote