Quote:
Originally Posted by Imme
Edit.....just had another look at the graph. The first issues goes north, the second 2 go south. I’d expect if it was a dropped frame or something similar that the constant of the earths rotation would show all issues in the same direction. I think you have other issues (but I’ve been wrong before!)
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If I sit and watch it (instead of making tea) I see the guide star shift horizontally to the left of frame in PHD. It doesn't matter what the orientation of the telescope is, it always shifts horizontally to the left (at the same y pixel value). Usually PHD flashes red, beeps and reports lost star and stops guiding although sometimes it seems to try to guide on something spurious until the camera gets back in sync and the guide star goes back to its proper position. If I stop PHD looping as soon as it loses the star and then immediately start looping again, the guide star returns to its normal position and I can continue guiding, usually without any blur in the sub. I must admit, I don't usually get crazy correction attempts like the one I posted but I usually catch it early.
You are lucky if yours is working well. Are you using Windows7 or a Mac?
https://www.cloudynights.com/topic/5...-and-asi120mc/
Kevin