Question about Meade LX200GPS Telescope

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I have 8" LX200 about

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You have GOOD power? You can try and replace the hand controller cable--

I would also Calibrate motors, and retrain the drives. But re-training must be done in alt az mode.

Posted on Mar 14, 2011

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Bought it used and don't know how to use it. no instrustions


good statement but you forgot a question along with details like what it is ,make , model year
ask the question again and include those facts

Jan 17, 2016 | Meade Polaris 114EQ-D (36 x 114mm)...

Tip

You Just Bought an EQUATORIAL Telescope Mount!


Even though we warned you not to do this, you bought one anyway! Beginners should never buy an EQ telescope mount as their first telescope. It's too late now; so I guess we will need to teach you how to use it!

Equatorial mounts move in a way that seems not to very intuitive. Unlike the easy Alt AZ mount which moves up and down and left and right, the EQ mounted telescope seems to move in TWO dissimilar directions at the same time.

Additionally you must first polar align the mount on the North star Polaris before you can use it. SEE! we told you not to buy it!

Here are the steps to roughly polar align the telescope so you can use it. If it is motorized the single Right Ascension motor will keep the sky object inside the eyepiece for long periods of time. If you do not have a Right Ascension motor, the slow motion RA knob can be slowly turned to keep the sky object centered in the eyepiece.

Begin by leveling the mount and tripod. Move the entire mount and tripod so it is pointing roughly to North, as close as possible using the steps below or a compass. Don't forget to adjust for your magnetic deviation. My location's compass reading is about 5 degrees away from true North. This is called magnetic deviation. You can find your location's deviation on the internet. Then proceed with the steps below.

First, adjust the Declination to the latitude for your observing site. Declination is the angle that the scope is pointing UP, and it's the same as your latitude. For example Dallas, Texas is about 32 degrees North latitude, adjust the scope so the small indicator reads 32 degrees. By the way, the North star in Dallas, TX is about 32 degrees above the horizon. Your latitude matches the elevation of Polaris (the North star) above the horizon.

Second, either look through the polar alignment scope buried in the axis of the telescope mount, or look along side the axis, and get the star Polaris lined up in the cross-hair of the polar alignment scope, or as best you can by looking along the side of the mount axis, or lining it up using your compass.. This will put the scope to within about 3/4 of 1 degree of the TRUE North celestial sphere. This is good enough for VISUAL observation, but NOT good enough to do astro-photography..

Adjust the DECLINATION up or down, and move the entire mount left or right until you can see Polaris as indicated above, or it is lined up as close as possible.

Now you are roughly polar aligned. Now you can move the tube around by loosening the Right Ascension lock, and or the Declination lock until your sky object appears in the small finder scope mounted on top of the main telescope tube.(DO NOT MOVE THE MOUNT, and the counter weight should never be higher than the telescope tube) Lock down the scope in both axis and use the fine adjustment RA and DEC knobs to center the target. Again, DO NOT move the mount or tripod. The mount should still be pointing at Polaris.

This web site illustrates this procedure:
http://www.astronomy.net/articles/4/polaralign.html

also this web site

http://www.telescopes.com/telescopes/polaralignmentarticle.cfm

You should be able to keep an object within the field of view of the eyepiece by slowing turning the Right Ascension slow motion control knob-------- IF you are actually accurately polar aligned. Small adjustments may also be needed with the DEC slow motion knob since you are not exactly polar aligned using this rough alignment technique.

However it can be used successfully for visual observation. Your scope will now track the motion of the stars as they move across the sky.

Hope that helps you!

Clear Skies!
TelescopeMan

www.telescopeman.tumblr.com

on Dec 29, 2009 | Optics

1 Answer

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.

Dec 16, 2011 | Celestron Optics

1 Answer

Procedure to set up a meade 12" LX200R on


It's pretty much all spelled out in the manual. Here:

http://www.meade.com/manuals/TelescopeManuals/LXseries/LX200-ACF_manual.pdf

You should train the drives, and purchase a separate 12 volt power pack with the correct cigarette lighter style power cable. Calibrate motors BEFORE you train the drives with the same power source you will use outside at night.

If this is a GPS model-- and new--- I would execute a RESET on the hand controller-- calibrate motors and train the drives and take the scope outside and get a Satellite link and do a two star automatic alignment.

Make SURE you are centering the correct alignment stars. By the way TRAINING must be done in alt az mode before you put the scope on a wedge-- it cannot be done in polar mode.

Sep 18, 2011 | Meade 12 Inch LX200R f/10 Advanced...

1 Answer

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

Oct 14, 2010 | Bushnell Optics

1 Answer

Hi, Bought a used telescope with a GT mount. The polar adjustment will not go below 46 degrees without binding. The binding screw only turns 1/4 turn in each direction and appears to be binding the...


This scope does NOT need to be polar aligned --

Here is the manual:
http://www.celestron.com/c3/images/files/downloads/1228334587_nexstargt.pdf

This is an ALT AZ goto scope. Read the manual above. You use the hand controller to move the scope in Altitude and Azimuth(left-right).

You must align it on 2 stars in order for it to has successful gotos.

Read the manual above.

Aug 21, 2010 | Celestron NexStar 114GT (269 x 114mm)...

1 Answer

How do i set up a tasco telescope


Here is the manual:
http://www.tasco.com/products/manuals/46060675_TML-722.pdf

This is a very small refractor on an equatorial mount. The mount must be POLAR aligned before you can use it. We NEVER recommend this to a beginner.

However you bought one anyway! SO--- go to my profile page and read my TIPS on polar aligning an EQ mount. Several of the other TIPS will help you.

Also read this:
http://www.texasastro.org/telescope.php

and this about polar aligning an EQ mount-
http://www.astro-tom.com/tips_and_advice/precision_polar_alignment.htm

Aug 21, 2010 | Tasco Astronomical 302675 Telescope

2 Answers

Meade LX200GPS 16" out of calibration?


Before you panic I would update the firmware/software on the telescope. With an LX200 interface cable you can upgrade the software in your telescope from your PC by going to Meade's web site at www.meade.com

Download Meade's ASU (Autostar Update Utility) and the latest software for your Autostar II absolutely free. You can also use the ASU to add Comets, Asteroids, Satellites, and User Objects to your Autostar II with a few simple clicks of the mouse.

I believe you can get the manual here.

Jun 04, 2010 | Meade LX200GPS Telescope

1 Answer

Polar alignment is writen for northern hemisphere, no southern.Is there a southern manual?


look on your power box for a switch that will have a N on one side and an S on the other ...you just select which hemisphere you want.

Oct 03, 2009 | Meade LX200 GPS-SMT 12" (750 x 314mm)...

3 Answers

Meade LX200 10" SC Telescope


You have a standard lx200 problem. If you transported your scope a lot with the drives "locked" it damages the RA and DEC drives. If you keep using it, the motors burn out and start drawing too much current. This sometimes blows the motor driver chips on the motherboard which are getting very rare.

The burned out tantalum caps can be replaced with better aluminum electrolytics very cheaply. If the ones in your Autostar burned out, they often burn up the ribbon cable. Also, they often take out U11, a 74LS14 chip on the motherboard. Also a cheap repair. You should take the Autostar apart. If they are burned up, it will be obvious. If your ribbon cable survived, you should replace the caps with aluminum electrolytics. I believe they are 6.8 uf.

So, if you can work an ohmmeter, measure the resistance of the two drive motors with the plugs unplugged. If it is about 14 ohms they are ok. If they are about 3 or 4 ohms, they are toast. Check the worm drives for end play. If there is just a little, you can adjust them. The battery jack on the control panel often breaks the solder joints on the board, causing one of the problems you describe. You can check that and replace/resolder as necessary. The on/off switch often fails and gets intermittent. These are also cheap and can be replaced. I don't repair these for a living but I repair a few of them for friends in the club. These are pretty common problems.

Feb 27, 2008 | Optics

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