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Old 27-10-2010, 10:06 PM
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[1ponders] (Paul)
Retired, damn no pension

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Join Date: Nov 2004
Location: Obi Obi, Qld
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Is this a tight dec worm?

I'm after confirmation (or otherwise) that this sawtooth shape to my dec graph is caused by a tight spot on the worm/gear mesh. I only seem to get it at around -69 dec in dec (NGC2070 & NGC1910) that I'm aware of. The balance in dec is good and even if it was out the orientation of the mount atm means there is little weight on the dec axis as the RA is almost vertical. The first graph is from tonight at the described coordinate the second is from a week ago shooting M20
.

Oh and its not polar alignment. According to the Gemini I'm only 8' out in elev and 4' out in az. Drift alignment was also confirmed a few nights ago using K3 and was spot on. drift of less than 0.7 arcsec/min
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