Schneebauelli

If you could not fix the problem. Have a look at your belt and compare the tightness of the RA - Belt with the tightness of the DEC-Belt. They should be around the same and the belt should be stretcheable with a light touch by 1-2 mm. As from your guidelogs it is clearly visible that you have some high frequency patterns with a period of 13.6s in the first two logs and in the newer log it has a 21 second period which can not be guided out easily or be removed with PPEC. In all three logs those high frequency disturbances have magnitudes of at least 0.5 " and contribute to a lot of your total RA error. I would expect that the RA belt is a bit loose or does not fit perfectly. Try to adust it, do not overthighten it, and have again a look at the frequency analysis of the PHD-Log viewer and see if something changed for the better. I had a similar problem when i got my new EQ 6-R Pro and got rid of the highfrequency disturbances by slightly tightening the RA belt to the same level as the DEC -Belt. When adusting loosen the 3 screws a bit that hold the RA motor in place then tighten the little Allen Screw between the two gears a little bit to increase the tightness of the belt. Before putting everything back together plug it in and check if everything works/sounds smoothly as before. Cheers Schneebäuelli