JohnG
29-09-2006, 12:29 PM
Hi all
Thought I would pass this on.
Over the last few weeks I have been getting some tracking errors on my autoguider setup (ED80 on a TGAD with ST-4). Stars have suddenly starting to appear out of round with the occassional streaks. :shrug:
This all started happening about 3 weeks ago. At that time I replaced the standard finder with a right angle finder which was slightly heavier.
Yesterday while doing some essential maintenance on my mount and gear I noticed out of the corner of my eye the guidescope moving ever so slowly. :doh:
It has turned out that the guidescope was rotating within the tube rings even though they were tight, it appears that the extra weight of the finder caused this slow turn thus throwing the ST-4 out and causing it to give ever increasing corrections.
I have fixed the problem by placing some thin rubber strips inside the tube rings and filing off where they join.
Another live and learn guiding experience.
Cheers
JohnG :thumbsup:
Thought I would pass this on.
Over the last few weeks I have been getting some tracking errors on my autoguider setup (ED80 on a TGAD with ST-4). Stars have suddenly starting to appear out of round with the occassional streaks. :shrug:
This all started happening about 3 weeks ago. At that time I replaced the standard finder with a right angle finder which was slightly heavier.
Yesterday while doing some essential maintenance on my mount and gear I noticed out of the corner of my eye the guidescope moving ever so slowly. :doh:
It has turned out that the guidescope was rotating within the tube rings even though they were tight, it appears that the extra weight of the finder caused this slow turn thus throwing the ST-4 out and causing it to give ever increasing corrections.
I have fixed the problem by placing some thin rubber strips inside the tube rings and filing off where they join.
Another live and learn guiding experience.
Cheers
JohnG :thumbsup: