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I'm getting totally confused about what I should be looking at when guiding with PhD. Can anyone explain the attached graph? In blue, we have RA and in pink we have dx. I haven't included DEC/dy as I wasn't guiding in DEC for this period.
So the RA line is what we look at when determining our Osc index and RMS values. Going by my image scale, the RMS for the blue line is ~0.4, which is good for me because I'm guiding at 700mm. I have been informed that PhD is doing what it's supposed to be doing based on the RA line. However, my confusion is that if PhD is "guiding" correctly, why is there "drift" in dx (pink line), which I can confirm when looking at the star i.e. it's moving away from the crosshair?
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