PHD2 Dec Axis Issue?


dvuolhhr6nx4a532a3phnju3zs6lzvlgxdl2wzaf@...
 

Hi,

My mount is an AP1100GTO and I am wondering if I may be developing a Dec issue with it. For the last year or so I have been using a C11 Edge for imaging (.28 image scale) along with PHD2 for guiding and have had no real issues. I would dither every frame (30 sec Lum) with a "Very High Dither" in SGP and again I had no issues. Normally my RA/Dec would be around .4" with the C11 while dithering every frame.

I just switched over to my SVQ100 (1.35 image scale) and while the guiding seems good when I am not dithering (RMS .3) it goes bad in Dec when I do dither (see pic PHD2.jpg).

The subs taken seem ok (eccentricity is pretty high though (.6) but I do not understand why I am getting such a high RMS in Dec for the same dithering settings (I did change the FL to 580mm for the SVQ100 in PHD2). I am wondering if there is an issue with the mount?




Diego Gomez
 

Hi Tony,

Regarding the issue you were facing, I wondered if it was addressed. If yes, could you please let us know what you did?

Thanks,
Diego


dvuolhhr6nx4a532a3phnju3zs6lzvlgxdl2wzaf@...
 

Hi,

I think my only issue was that because I was dithering a lot with short exposures (and extreme dither) PHD2 and the mount were kinda working against each other resulting in the higher RMS values. Without dithering the mounts tracks/guides beautifully. So more user operator error :)