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Equipment Discussions >> Mounts

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Donnie D
professor emeritus

Reged: 03/21/08

Loc: Madison, Mississippi
Drift align steady for South, but east will drift
      #4565510 - 05/06/11 02:33 PM

I have started putting effort into drift align. Found great article on Starizona (others out there too I know).

1) Performed Physical Polar alignment with Polar Scope. (Kochab included)
2) Performed 2 star with cal stars
3) started Drift alignment routine.
4) As it turns out, my South Meridian seems to be exceptional steady.
5) The East Drift star starts to drift readily.

As my understanding goes, the Altitude gets adjusted for this one (East).

Main question. I guess it "can" happen that the East Drift can have problems while the South can not have problems. I guess that stands to reason it can happen.

While making a very small adjustment to the Altitude, while looking through the EP cross-hairs, I did notice that the "position" of the star changed in an opposite way relative to what I would have expected. Just my lack of experience talking here. I also heard that there is some inter-play as if I make a slight adjustment to altitude, then I am going to have to swing the scope back to South and do that again.

Just rambling folks. !!!


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Post Laureate

Reged: 12/06/05

Loc: PA
Re: Drift align steady for South, but east will drift new [Re: Donnie D]
      #4566079 - 05/06/11 07:40 PM

Are you using a Newtonian? That will move the stars in the eyepiece opposite of what you'd expect from a refractor or SCT.

What do you mean "problem" with east drift. You're supposed to see drift if you aren't perfectly aligned. How quickly is the drift becoming obvious?

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