MichaeL

Mark, after I read the "weird behavior" thread I'm almost certainly sure your approach to the erratic slewing problem is correct ! It's the Homefind. Sorry, I wasn't clear when I said "close to the horizon". I meant more like 30-35°. Somehow low Alt values seem to trigger the problem. I will definitly spend more effort on the absolut perfect balance ! But the scope with everything on it is below 23Kg. My "D" value ist really low to avoid oscillations, P and I are moderate and on comparable levels.

Thanks for your thouhts Mark. I did a homefind indeed, but eventually something went wrong (or I`m out of training). I'm postive this could help avoidig the erratic slewing ! On the other hand I'm more and more convinced the motor problem "position tracking error" and the fact the mount doesent react to the joystic in RA result from another reason. I shoud've mentioned my Telescope is quite heavy and bulky (22Kg 12" Newton, needs the extra long bar and 7 counterweights) and the problem mostly occurs close to the horizon ! It kinds of remindes my of the problems described in the

Dear commununity, first, I'd like to say it's lovely this community exists and we ASA users can keep in touch 🙂 I'm using one of the first DDM60s with old encoders and Elmos electronics. Recently I had to set up my software completely new after my old PC crashed. Recently I experience the following: - In the RA-axis the mount didn't react to any inputs (neither autoslew buttons nor joystick). DE-axis was fine. - Several times the RA-axis stopped tracking and "Servo Error" was shown in red in autoslew. The log window showed "position tracking error". After clearing the