Quote:
Originally Posted by Matty P
I am pretty thorough with balancing and polar alignment so I am positive that is not what is causing it. Whenever I setup I always balance the scope in both RA and DEC axis before proceding. I then spend an hour or so drift aligning getting my polar alignment as close as I can before doing any imaging.
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I have found that perfect balance can cause problems, especially if the worm is not firm against the drive wheel. By firm I don't mean tight -other problems.
I usually have the scope ever so slightly off balance ie 50g to ensure contact of the gears.
Check for slop by gently pushing the scope in either direction and detect movement before the friction of the clutch is felt.
It may be oscillation due to a loose-ish drive worm/gear contact.