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Pete, looking at your graph seems that it's a combination of both misalignment and balance. The sudden shift in RA is balance and will effect DEC as well. The progressive drop in DEC can be balance in DEC but most likely poor polar alignment. Disable the guide output in PHD and graph the tracking so you can drift align then start guiding again and it'll be spot on.
Last edited by multiweb; 20-03-2010 at 01:53 PM.
Reason: spelling
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