I have some questions about the ServoCat on my Obsession 15 classic that I hope viewers of this forum can help me with. I have had the telescope for a little over a year now and am still in the learning curve.
I have been looking at Mars the past few nights. Using higher magnifications with my 11mm ES EP (156x) and 6.7mm ES EP (256x), with tracking, I’m noticing some gradual downward drift of the telescope in the early evening, that is, when Mars appears above the horizon up to about 30 degrees. As the night continues and Mars rises, the drift is less and less and eventually stops or is hardly noticeable. Could this be due to improper balancing? How should I orient the weights on the mirror box? I’m still not clear how these should be positioned. I’m thinking that when the telescope is near low or near horizontal, that gravity is overtaking the ability of the altitude motor and cable to hold it in place. Could the cable be in need of replacing or should I find away to further increase the tension?
I never really noticed this before, as I typically do not observe planets with high power for extended periods of time. Any drift would be less noticeable at low power. I have also tried the local sync and autolock feature but still have the same problem. Not sure I’m using this correctly. I also wonder if some setting needs to be adjusted in the programming?
Or could it be due to choosing the wrong alignment stars? Since I’m only looking at Mars I did this to facilitate tracking. Is there a way to start tracking without doing the alignment?
I have had the telescope, a little over a year now, but have not had the issue of downward drift until just recently, as I described. Otherwise everything seems to work fine.
So far my main problem with Mars is poor seeing from my CT shoreline location as I have a hard time seeing any defined surface features. I am able to see the polar ice cap. I have been trying some of the Celestron filters like ND and orange #21, these help a little but so far it’s been somewhat frustrating. Even as we approach the opposition, I'm still finding Mars to be a tough target for visual astronomy. Thanks for reading!
Edited by leetje, 24 September 2020 - 09:28 AM.