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Thread: Flexure/stiction - or something else

  1. #21
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    Default Re: Flexure/stiction - or something else



    Quote Originally Posted by jimminCT View Post
    You don't have a coiled cord from the R.A. axis to the Dec.? I do and I have to make sure it's set on the R.A. housing properly or it drags like crazy...
    Of course I do - I connected it 4 (or is that 5 - when did storm Sandy hit?) years ago and haven't thought about it since. I can guarantee that I haven't considered it at all in tracing cable runs - but I will now!

    Bob
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  2. #22
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    Default Re: Flexure/stiction - or something else

    Quote Originally Posted by bobharmony View Post
    I'm not sure the concept of "lifting the load" makes much sense to me on the DEC axis. The scope could be moving in either direction in DEC, assuming the polar alignment is good. Ideally it wouldn't move at all in DEC. It is a bit different than East heavy for RA. In that case it is easy to see how being east-heavy keeps the RA gear engaged.
    Bob
    Think of it this way...You always want your gears pushing instead of pulling. The gears then "mesh" better and with that you get better tracking with less backlash. The RA needs to be slightly East heavy in our neck of the woods (to the right standing in front of it) and the DEC the same as if you were standing in front of it also slightly heavy to the right (front of the OTA) which is to the right.
    My eyes
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  3. #23
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    Default Re: Flexure/stiction - or something else

    Quote Originally Posted by Leveye View Post
    Think of it this way...You always want your gears pushing instead of pulling. The gears then "mesh" better and with that you get better tracking with less backlash. The RA needs to be slightly East heavy in our neck of the woods (to the right standing in front of it) and the DEC the same as if you were standing in front of it also slightly heavy to the right (front of the OTA) which is to the right.
    This is making my head hurt. When you say "in front of the scope" do you mean I am standing South of the scope facing North? That would put east on the right, If I want DEC to be "right-heavy" in this orientation, to me that would indicate front of the tube heavy if I am shooting East of the Meridian, and mirror side heavy if I am shooting West of the Meridian.

    I am sorry for the continued questions, but I need a detailed frame of reference to figure this out.

    Bob
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  4. #24
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    Default Re: Flexure/stiction - or something else

    Quote Originally Posted by bobharmony View Post
    This is making my head hurt. When you say "in front of the scope" do you mean I am standing South of the scope facing North? That would put east on the right, If I want DEC to be "right-heavy" in this orientation, to me that would indicate front of the tube heavy if I am shooting East of the Meridian, and mirror side heavy if I am shooting West of the Meridian.

    I am sorry for the continued questions, but I need a detailed frame of reference to figure this out.

    Bob
    Not a problem at all Bob. We are in the Northern Hemisphere so standing on the south side with the mount in front of you'd be looking North when adjusting the RA East heavy(to the right) and then if you have the DEC in front of you looking West you'd set the DEC and hence the front of the OTA slightly North heavy (to the right). I hope this helps.
    My eyes
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    Default Re: Flexure/stiction - or something else

    I also forgot that starting with RA looking North towards Polaris with the balance bar and rig horizontal your weights will be on the left and the scope will be on the right. Again I hope this helps.
    My eyes
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