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Old 01-11-2021, 01:40 PM
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multiweb (Marc)
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Join Date: Oct 2007
Location: Sydney
Posts: 22,077
Quote:
Originally Posted by Saturn488 View Post
Last night was imaing the Tarantula Nebula (tends to stay more or less in the same spot in the sky) and my guiding was good and bad throughout the night.

My guiding was bang on for a bit, then it went off in the DEC or RA then recovered. Every now and then it said it couldn't make sufficient adjustments so I am thinking maybe the object wasn't high enough?

I do have the log which I can provide but it is quite big.

Any ideas why guiding can be up and down?
When you're imaging the tarantula there's always a period of time where your counterweight bar is vertical so when your RA worm lost its preload your mount will oscillate within the backlash until it's on an angle again and the worm rests on the other side of the spur gear.
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