I'm using AA+ to guide a C11, using the Starizona .63 reducer/corrector, a 400mm guidescope and ASI678MC as guide camera, an ASI294MC main camera and an NBZ filter, focusing with EAF, all on a Skywatcher CQ-350 mount. A quick summary of the problem is that, although my guiding is good, my images steadily move, mainly in one direction, at least until meridian flip when it will reverse. See the link for a video clip (I don't know why the forum software is putting the Dropbox link on two lines but they are both together for the link):
https://www.dropbox.com/scl/fi/fff5q0e7livhl82gsts0p/IMG_2107.MP4?rlkey=t77ydmqcfey3o5kejxuzgte6z&st=3ymtwb82&dl=0
As you can see from the attached graph, my guiding is good (0.51 arcseconds total error). I dug deep and compared the guide log entries to the image timestamps and found that there are gaps where the guiding AND imaging will both stop, for no apparent reason and then restart. Normally these would approximate the length of one image, sometimes two and once for three. I have no idea how, or even if, this would tie into the movement I'm seeing but my gut tells me that it's too much of a coincidence.
It's cut off on the graph image but there is a line at the top that says: "Dither = RA only, Dither scale = 1.000, Image noise reduction = none, Guide-frame time lapse = 0, Server enabled". I'm not sure what all this means but my dithering was definitely turned off in the guiding tab, advanced settings in AA+
Before you ask:
yes, I'm guiding in Sidereal
no, my guidescope is not loose or shifting
yes, I have already swapped out all the cables
no, I do not have power issues (I power the mount from a 10amp brick and the AA+ from a Jackery with #12 wire)
I have two AA+ devices and the issue occurs in both
I had the same problem when using an ASI183MC
Pixinsight was actually able to deal with this and I was able to stack 294 subs for a reasonably good image although, obviously, a lot had to be cropped from the edges.
I sure could use a little help. What could be causing this?
Al
