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Old 19-03-2010, 08:21 PM
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Tandum (Robin)
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Guiding Problem

I've been checking out some of the goodies I've bought while the dollar has been high and the sky is sort of clear and I've noticed what looks like a periodic error showing up in PHD. I've never seen this before until last night and I thought it may have been balance so I spent extra time tonight to ensure my balance was right. I recently greesed the mount and spent many hours adusting the worm gears. Do you think I've got it wrong? Where should I be looking to resolve this, it's destroying long exposures.
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Old 19-03-2010, 08:30 PM
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my guess is there's a tight spot on the RA. May have to loosen up the meshing a bit more. Hope you find the problem.

Dave
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Old 19-03-2010, 08:41 PM
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Tandum (Robin)
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I was trying to put that out of my mind, it's a bugger to get right.
I'll get the alen keys out shortly I guess

Didn't see this with the 10" newt on top
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Old 19-03-2010, 08:49 PM
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Possibly a worm issue, looks like it's happening every 8minutes during each worm cycle run?
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Old 19-03-2010, 08:53 PM
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No good for 10minute subs and some are quite big ...
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Old 19-03-2010, 08:57 PM
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Yikes, Not sure if a pempro run will tell you where its occuring, might be worth checking out.
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Old 19-03-2010, 09:00 PM
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Tandum (Robin)
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Got the allen keys ready, just waiting for this last sub to finish and I'll have a go at it. Just shooting the horse looking for reflections but it's diving into the city lights now anyway ..
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Old 20-03-2010, 12:05 AM
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Tandum (Robin)
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It seems a 1/4 turn more mesh made it usable but there's still something periodic there, just a lot less of it

Thanks guys.
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