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Rob
I checked the power at the mount and found 11.7v which was slightly low, so increased it to 13v but found no change in the drift. Drift aligned the mount then did some PEC data runs and noticed on the K3CCDtools screen the drift was about -18.5arcsec/min. The PEC analysis says the R/A trend is Y=0.3087X +- 11.5 but I'm not sure if this the same thing I'm chasing. Rob, what is your PEC R/A trend? I included a screenshot of the PEC analysis for member comments so everyone feel free to jump in. Discovered that the lunar rate had less drift (+10.2) than the sidereal rate (-18.5) and got so frustrated at trying to figure out what's wrong that I took a bunch of shots of the orion nebula by flipping from sidereal rate to lunar rate to keep the image centered over 30 minutes. Still this is no long term answer. Rob, if you aligned everthing perfectly, then switched to “lunar rate” what would the expected star drift in arcsec/minute be? Would it be +28.7 (-18.5 + 10.2)? I guess what I'm trying to work out is what the rates in arcsecminute are for sidereal and lunar rates. I tried using the eqmod “custom rate” and tried everything from 0.0000001 to 30 and the stars drfited/streaked far to fast. The dec rate was left at 0. I am at a complete loss as to how to use the custom rate function and what numbers would be a useful starting point, so if anyone is listening help would be greatly appreciated.
Regards
Stephen
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