Question about Celestron NexStar 8 GPS Telescope

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Long story-short version. Cord wrappedthe scope

Long story-short version. Cord wrappedthe scope now the AZM motor is jerky while tracking. Any suggestion on repair or replacement of motor?

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Very fine gears are not very fine any more
very delicate and hard to do for you
for swiss watchmaker ok to attempt
send back to factory is best suggestion.

Posted on Feb 21, 2009

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Thiscode is likely a hand controller failure and you need to call Celestron. Mine did this too. good luck, you will need it...

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Manual for TwinStar 1000mm focal length telescope and equatorial mount


Equatorial mounts need to be polar aligned to work correctly. Once the scope is polar aligned (see manual or look online for polar alignment instructions), turn on the RA motor. Loosen your RA and DEC locks and find a object you want to view, The motor should keep the object in view for a while (depends on how good the motor tracks and how good your polar alignment is.) Spending 10 minutes polar alignment on my C8 keeps the object in view for about an hour without adjustment.

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Orion sells these:
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I have a bausch & Lomb Criterion 6000 telescope that I need an instruction manual for. Can you help me?


No manual available and I could only answer general questions about the use of this scope but would take a lot of room. Suggest you join Cloudy Nights or Astronomyforum.net. Post this question to the SCT forums. You will get a lot of great information from how to set up, align, and get the most use out of this scope. The optics are not the greatest and has lots of non-standard threads for accessories but SCTs are very versatile scopes

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I am looking for someone in Michigan near Sunfield, I have a Meade ETX125PE that I would like someone to help me with. e-mail address is petew@cablespped.com and petew@twincityfoods.com.


Contact a local Astronomy club nearby and the members will help you with the scope.

http://www.astroleague.org/societies/list/MI

Also this is the general setup for the NON- PE version of this scope.

1. Do a calibrate motors

2. Train the drives

3. Take the scope outside and level the tripod.

4. Put the scope in the HOME position (read the manual)

5. Execute a 2 star alignment and center both stars.

Dec 29, 2010 | Meade ETX-125EC (500 x 127mm) Telescope

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My telescope-Meade LX200GPS when tracking the star,it can catch it in some minutes ,but later the star out of eyepiece,is it not tracking the goal? when I tracking the jupiter,the telescope can find the...


To track the scope must:

1. Have a Calibrate motors done

2. Be well Trained using the training routine

3. Must have the correct TIME, DATE, and SITE, and Daylight Savings Time

4. Must be properly aligned on two stars.

Have you done all of the setup procedures listed in the manual? Locate a local Astronomy club and the members will help you with your telescope.

Nov 13, 2010 | Meade LX200GPS Telescope

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I just purchased a B.L model 4000 telescope. I do not have the owners manual. It has the feature that allows you to program the unit so it stayes on a object by compansating the earths rotation. How do...


You will not find a manual. This scope has been out of production for several DECADES!

The small wedge must be polar aligned in order to track the sky. The legs must be adjusted for your latitude.

It has a motor inside that rotates the scope to compensate for the motion of the sky once the scope is polar aligned.

Read these:
http://starizona.com/acb/basics/using_polar.aspx

http://www.meade.com/manuals/lx200/apxb.html

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My meade LX200GPS can't track the stars? wheater the bad weather of observation points will affect the accuracy of automatic alignment? how can I improve the tracking


You must Calibrate motors using the same power source as you use at night outside, then do a TRAIN drives. Some of these scopes also have a Calibrate Sensors -- and some do not.

Then do a two star alignment and center both alignment stars. Daylight Savings Time = Yes right now in the USA, check that it is set to YES.

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I need 3 reasons for whythese problem occur and 3 suggestions for remdiation: 1-alignment 2- localization targets 3- focusing 4- tracking


1. Failure to follow the manual and do all the initial setup. Time, date, and site, and usually training the motors.

2. I don't understand #2.

3. Focus until the stars are pinpoints of light. If you see donuts with a dark center you are NOT in focus. Practice during the daytime on a distant object using the eyepiece with the largest number written on it. The moon should be your first target at night.

4. Many things, broken gears, failure to train the scope, grease on the clutches, hand controller is set for terrestrial viewing instead of astronomical viewing so tracking is NOT turned on.

Read my TIPS about GOTO scopes in my profile page.

Jul 02, 2010 | Telescopes

1 Answer

I have a meade lx90 8inch 3 years old with autostar 497--when i try to raise the scope up it keeps drifting down also having problems with intermitant slewing on set up-both motors working ok


This is called "rubber-banding". Your scope needs to be re-trained.

So, setup a target during the day at least 100 feet away from the scope (200 feet would be better, Calibrate motors using the same power source you use at night, and Train Drives. Later after dark, do a Calibrate sensors on Polaris.

You should train drives about once per year, and calibrate sensors about twice per year.

You may want to update the firmware before you Train Drives. The latest version is 43Eg available on the Meade.com web site. You with need the Autostar Updater Software also available on the Meade web site under Customer Service---- Downloads. Version 5.9

www.meade.com

Oct 27, 2009 | Meade LX90 Telescope

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