It actually confused and frustrated me quite a lot, that I had those incredible good results with a QHY5 at 2x2 binning, but could not get an ASI 224mc at 1x1 to guide at all. It just went all over the place and aborted. Now it's clear that the proportional gain was much too high, as I was using the settings from the 2x2 binning.
I only got suspicious recently when I started to play around with PHD2 guiding. There QHY5 and ASI224mc worked fine as expected. With this experience I got back to INDI's internal guider and used the default recommended proportional gain values and it worked with both cameras at roughly the same RMS performance only 2x higher than I was experiencing with 2x2 binning.
As a side note: PHD2 performs a bit better than the internal guider for me, so I am using this for now.

CS Guido

Read More...