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rbdynamics
member


Reged: 08/18/08
Posts: 12
Recently purchased Nexstar 6SE & have a problem new
      #2599555 - 08/23/08 11:52 PM

Hey guys, I'm completely new at all of this and am so happy that I discovered this forum as it helped me choose the best telescope for my needs.

I set everything up (tripod, trays, eyepiece, etc.) and now I'm at the point where I need to find 3 objects (stars) in the sky. After several unsuccessful attempts, I am calling on cloudynights to help get me started on this never ending adventure! After I attempted the centering & alignment, my remote reads "Align Failed, press undo and try again".

Can someone please give me pointers on finding the 3 objects please.

Thanks for all your help guys!

Arbi


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Digital Don
scholastic sledgehammer
*****

Reged: 01/20/04
Posts: 883
Loc: Manteno
Re: Recently purchased Nexstar 6SE & have a problem new [Re: rbdynamics]
      #2599629 - 08/24/08 12:38 AM

Hi Arbi,

You might want to post this on the NexStar forum. Do you mean you cannot find 3 objects to align on, or you cannot center them properly?

Despite what's implied about using 'any three objects', the telescope is really expecting three bright objects to be used. At this time of the year Arcturus, Altair, Deneb, Polaris, and Vega are visible and good choices.

Alternatively, you can try the 'Auto two star alignment'. I've been using Polaris and Arcturus witn 100% success. This routine is reported to work more consistently than 'Sky Align'.

If you're having trouble centering the target stars, try defocusing them until they fill say 1/3 of the eyepiece field. It's easier to center them that way if you don't have a cross-hair eyepiece.

Also, don't rotate the diagonal between alignment stars - leave it in the same position until you finish. This minimizes any issues with the diagonal or visual back not being perfectly aligned with the optical path.

Everyone has some 'anxious moments' when they first get started so don't give up. Once you get the hang of it you'll wonder how you ever had a problem.

Good luck!

Don


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rbdynamics
member


Reged: 08/18/08
Posts: 12
Re: Recently purchased Nexstar 6SE & have a problem new [Re: Digital Don]
      #2599865 - 08/24/08 07:06 AM

Thanks Don, I thought this was the "Nexstar" forum.

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rboeAdministrator
Numbfinger
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Reged: 03/16/02
Posts: 39739
Loc: Phx, AZ
Re: Recently purchased Nexstar 6SE & have a problem new [Re: rbdynamics]
      #2600567 - 08/24/08 02:17 PM

We have two - and probably shouldn't but we can't merge the forums so there you are. Look for it list just above this one on the master index page.

This forum has a focus on the 8" and up NexStar and CPC scopes. The reasons for two are lost in history.

Alas we'd be glad to help - if we knew anything about that model. Sorry.

Welcome to Cloudy Nights by the way.

--------------------
Ron


NS11GPS
Pronto
16" dob
15X70 Obies



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Larry F
Pooh-Bah


Reged: 05/24/04
Posts: 1398
Loc: Westchester, NY
Re: Recently purchased Nexstar 6SE & have a problem new [Re: rboe]
      #2601093 - 08/24/08 06:21 PM

Here are some ideas:

Make sure the tripod is level.

Make sure the telescope knows its in the right time zone and has daylight savings properly set for your area. Many people fail to set the clock to the right zone! The default is PST, which isn't applicable to most of the world!

Make sure your finder is aligned with the scope by lining it up on a stationary terrestrial object like a house light. Don't trust the finder to be in alignment just because it was the previous night.

Make sure your GPS has linked. You have to be patient sometimes. Then select the three brightest stars you can find, hopefully distributed in 3 different areas of the sky.

After moving by hand with the clutches disengaged to get in the area of the first star, make sure the clutches are tight. Then use the arrow keys to move to the first star.

A possible, but less likely, reason the alignment could fail is that you are not getting the stars close enough to the center of the optical path, so the algorithm in the scope's computer can't quite fit them to its internal map. I'm not sure what the error tolerances are, but if your enough off center and it's taking you a bit of time to go through the routine, it might fail. For each star, first "center" it, which means get it in the field (near the crosshairs of the finder, which should put it somewhere in the eyepiece field), press "Enter" and then get it exactly centered in the scope's eyepeice before pressing "Align". Use your highest-power eyepiece and defocus the star so it is a large round ball and is concentric with the edge of the eyepiece field. That's the easiest way of making sure it's close to center. If it's moving because the scope is not yet tracking, hit the "Align" key when it has exactly reached the concentric position. Alternatively, you could use a high-power illuminated reticle eyepiece to find the exact center but that's going to add $80-$100 to your cost (Adorama is advertising one for $77.95). I use one and I find it really helps.

Also, make sure you are at full power, because if the voltage is low the computer is very unhappy and does some strange things.

My general advice is to learn the names of 10 or so stars on the entire Celestial globe and then you can use Auto 2-Star align, which is faster and just as accurate. I did a SkyAlign the first night out with the scope (a CPC, but same electronics and software I believe), but haven't done one since.

If you are looking at the moon or a planet, just do a SolarSystem Align and it will be good enough.

Keep trying. You will succeed! Then, of course, it will get cloudy and rain.

--------------------
C5 Orange Tube SCT
Orion 127 Mak
SV Nighthawk (1st generation)
CPC 800 XLT SCT
Coronado Maxscope 40
5 1/4" f/5.2 home-built Newtonian
Denk II Binos
Giro 2/Tech2000 Giro Driver/Tech2000 QuickDraw Pier
A zillion eyepieces and some more mounts
Mason & Hamlin BB 214 cm (piano)
My Gallery


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sanlopez
super member


Reged: 12/03/07
Posts: 149
Loc: 36 09'46.69 N, 86 46'38.26 W
Re: Recently purchased Nexstar 6SE & have a problem new [Re: Larry F]
      #2601649 - 08/24/08 11:37 PM

Larry:

I don't think the alignment routine for the 6Se is the same as for CPC scope. My Nexstar 5 has neither clutches nor a GPS module, which is a separate accessory and RBD does not mention having.

More than likely the problem is incorrect setup of time zone, Daylight savings, lat/long, or a combination of all 3

--------------------
Celestron GPS C925
Celestron Nexstar 5
2005 Gretsch SSLVO
Fender Custom Vibrolux
1963 Galaxie 500 XL convertible
1973 VW type 181 "The Thing"
And an absolutely wonderful wife


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Larry F
Pooh-Bah


Reged: 05/24/04
Posts: 1398
Loc: Westchester, NY
Re: Recently purchased Nexstar 6SE & have a problem new [Re: sanlopez]
      #2606125 - 08/26/08 11:09 PM

I stand corrected. I thought the SE did have a GPS but I just reviewed the specifications and see that you are correct.

I looked at the alignment routine in the 6SE manual on Celestron's web site and absent the automatic GPS downloading of time and location, the routine is the same as for the CPC.

I didn't realize there were no clutches. I suppose that there could be a mechanical problem in the drive train, but that seems a long shot and hard to test. What about software? Some of the earlier scopes benefitted from upgrades in the motor control and hand control software.

--------------------
C5 Orange Tube SCT
Orion 127 Mak
SV Nighthawk (1st generation)
CPC 800 XLT SCT
Coronado Maxscope 40
5 1/4" f/5.2 home-built Newtonian
Denk II Binos
Giro 2/Tech2000 Giro Driver/Tech2000 QuickDraw Pier
A zillion eyepieces and some more mounts
Mason & Hamlin BB 214 cm (piano)
My Gallery


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MachMike
member


Reged: 12/08/07
Posts: 79
Loc: Colorado
Re: Recently purchased Nexstar 6SE & have a proble [Re: Larry F]
      #2620339 - 09/02/08 11:58 PM

We set up a few 6SE Nextars at a star party last weekend and found that the only way we could avoid alignment issues was to use EXTERNAL power. Not the batteries. The moment we changed there were no 'alignment failed' issues. Before we hooked up to external power we could get an alignment but the scope would go bonkers and execute a full gainer (roll over) after slewing to more than three objects.

My father also has a 6SE and I was able to duplicate the error when running on internal batteries.

Great scope BTW.

--------------------
Nexstar CPC 800 XLT
OPT 2" 99% dielectric diagonal
Tele Vue 24mm Pan, 13mmN6, 9mmN6, 13mm ETHOS
Celestron 2x Ultima Barlow
1000 Oaks LP-2, and O-III Filters
Feather-Touch Focuser
20/10 eyesight


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