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Equipment Discussions >> Mounts

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beatlejuice
Pooh-Bah
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Reged: 04/05/11

Loc: Hamilton, ON,Canada
Re: how set the seting circles new [Re: De Lorme]
      #5596817 - 12/30/12 07:40 PM

I think you are over complicating things, as Rod said,
just get polaris in the center of a high power eyepiece and set the AZ to zero. For slightly more improved accuracy find the AZ of polaris(planetarium software) for the time that you are setting up(this will be approximately between + or - 1/2 degree on either side of zero. Set your AZ for this slight difference from zero and your set. Dont forget to level the scope as best you can.

Eric


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De Lorme
professor emeritus
*****

Reged: 12/30/08

Re: how set the seting circles new [Re: rmollise]
      #5596828 - 12/30/12 07:46 PM

If I could by pass Polaris,go to 0 and then any object I wish it would be easier. I would have to ajust the magnetic
deviation once a year though. Taking a minute every time I go out to do a star alignment would be to me another step that's not necessary. This is an idea only as you said if it's done accurately and no metal interferance.
I'm looking into a really good large compass. Any advice is
really appreciated. I know I stand on the head of giants here. I look forward to reading what everybody has to
say. Thanks for the help. De Lorme


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beatlejuice
Pooh-Bah
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Reged: 04/05/11

Loc: Hamilton, ON,Canada
Re: how set the seting circles new [Re: De Lorme]
      #5596999 - 12/30/12 10:02 PM

I am wondering if you have read this thread degree circles If not, take a good look at it. It's long, but contains just about anything you want to know about them.

Eric


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rmollise
Postmaster
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Reged: 07/06/07

Re: how set the seting circles new [Re: De Lorme]
      #5597641 - 12/31/12 10:07 AM

Quote:

If I could by pass Polaris,go to 0 and then any object I wish it would be easier. I would have to ajust the magnetic
deviation once a year though. Taking a minute every time I go out to do a star alignment would be to me another step that's not necessary. This is an idea only as you said if it's done accurately and no metal interferance.
I'm looking into a really good large compass. Any advice is
really appreciated. I know I stand on the head of giants here. I look forward to reading what everybody has to
say. Thanks for the help. De Lorme




Help us to understand why you have a problem centering Polaris, which will be much more accurate than what you are proposing. To recap:

Center Polaris in the field.
Set circile to 0.
You are done.



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De Lorme
professor emeritus
*****

Reged: 12/30/08

Re: how set the seting circles new [Re: rmollise]
      #5598108 - 12/31/12 02:41 PM

I made a mistake on the design. I attached the lazy susan to
the base with a board the same size of the laze attached to it. I then made a larger board on with the setting cirlce
would sit. I thought if I put a spacer between them it would allow the setting circle board to turn. All it do
though was to make the base wooble. I could not find a
solution until I came across the ajustment with magnetic
declination. I thought my prayer had been answered.
I read that the magnetic declination moves approximately 40
miles per year. Perhaps if I do an ajustment once a month
it will work. If not there is SkyScout. OR mabey someone here has an answere to my problem of which I would gladly
give a BONUS! I eagerly await your reply. De Lorme BTW Thanks for the help.


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rmollise
Postmaster
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Reged: 07/06/07

Re: how set the seting circles new [Re: De Lorme]
      #5598241 - 12/31/12 03:49 PM

I think you need to read the circle threads on the Equipment forum and rework your circle. What you propose is just not going to work well. Center on Polaris and you will not have to adjust the circle again unless you move the mount.

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De Lorme
professor emeritus
*****

Reged: 12/30/08

Re: how set the seting circles new [Re: rmollise]
      #5598401 - 12/31/12 05:14 PM

Hi Rod, Are you sure I will not have to ajust to Polaris
in say a month? Since I'll have this in my rool off roof
permanently,problem solved. If I have to move it Skyscout
here I come. Thanks for help, De Lorme


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rmollise
Postmaster
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Reged: 07/06/07

Re: how set the seting circles new [Re: De Lorme]
      #5599241 - 01/01/13 09:16 AM

If you are worried about that--which won't really make that much difference, it's easy to overcome it, as another poster said. Wait till Polaris is at UPPER OR LOWER CULMINATION (directly above or below the pole) some night, and center it and adjust your circle then. A planetarium program will tell you when that will happen.

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De Lorme
professor emeritus
*****

Reged: 12/30/08

Re: how set the seting circles new [Re: rmollise]
      #5601834 - 01/02/13 07:49 PM

Thanks Rod, I have Sky 6. The weather will be bad forever here. Giving me the time to finish this up. De Lorme

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