Question about Meade ETX-125EC (500 x 127mm) Telescope

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Azimuth motor gearing problem

Just picked up a second hand ETX-70. When powering up for the first time, Altitude motor movement is ok, but the azimuth motor, whilst hearing it work, does not rotate. I've checked the horizontal lock. Is this repairable? I have a Meade ETX-125 that will not slew to the left. It goes alright to the right and up and down. Have taken the bottom off and checked gears for wear etc. All look good. When I use the control box to slew to the left I hear a noise like the gears are not meshing. When I give the gear a little help it will move but as soon as I stop helping it stops moving.
Any help will be appreciated. Thanks

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Sounds like it could be that the worm gear is not meshing
Look here for guidelines in the internals

Posted on Feb 17, 2009

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1 Answer

Hi I have a meade ETX 105 pe I can get the scope to move Alt motion with the controller but it wont move in the Azimuth position with the controller. Might I be doing something wrong


This can be caused by 4 things-

A stuck button on the hand controller.

A bad hand controller cable

A burned out circuit board inside

A burned out Azimuth motor

(Long shot) bad firmware in the hand controller. DO a Reset and reload the firmware.

Try to borrow another hand controller and buy a new cable. If these two do not fix it then it's a mechanical problem or a circuit board problem inside the scope.

Meade can repair this but you will need to send them the scope:
http://www.meade.com/support/index.html

Mar 26, 2011 | Meade ETX-105AT (420 x 105mm) Telescope

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ETX 60 altitude doesn´t work, but motor works


You need to tighten the friction lock - it acts as a slip clutch.

Apr 08, 2010 | Meade ETX-60 AT Telescope

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The azimuth adjustment keys don't work


Send it back along with the hand controller describing the problem. Could be several things including a bad hand controller. If there is a local astronomy shop nearby take the scope there and ask to try one of the hand controllers in the shop and test it. If it now works you just need to buy another hand controller.

Otherwise send it in for repair

Jul 01, 2009 | Celestron NexStar 5 SE (300 x 44.45mm)...

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The Azimuth Dial isn't firmly attached cause altitude cannot be fixed to an angle


Most of the small telescopes setting circles really cannot be used to find anything--- just not accurate enough---

Try using a star chart -- and star hopping --- to what you want to see.

A free monthly star chart is available at :
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2 Answers

Azimuth motor gearing problem


I also purchased a used Meade ETX-70, only to find it had the same problem with the rotation axis motor running but no movement. After removing the bottom cover, I found the motor w/worm gear would not contact the main rotation gear. I solved the problem but purchasing a small 3/8x3/4x.032 spring that I had to custom fit to hold the motor w/worm gear against the rotation gear. Take caution not to have the spring apply to much pressure or it will cause to much drag.
To gain access, remove the bottom round cover(it will just pop off).
Then use a small .05 allen wrench to remove the set screw in the horizonal chrome lock. The chrome lock fits over a 1/2" bolt. By removing this bolt you will remove the washer/bearing assembly. After removing this, you will see a nylon nut, use a 11/16 socket to remove. Becareful, it is a fine thread and you don't want to cross thread it!
After you remove this, you will be able to remove the bottom housing, which will expose the motor and gear. You should be able to see what I am referring and where to place the spring.
If you can make it this far, then you should be able to install the spring. I used a little small dab of Gorilla glue to hold it in place, since the spring will have enough constant tension to keep it from moving.
I'm not sure if this was a design flaw, but I got no help from the Techs at Meade, only that they would upgrade to a ETX-80 for $149.99 plus shipping.
Hope this helps.......

Aug 12, 2008 | Meade ETX-70 (240 x 70mm) Telescope

1 Answer

One of the gears in the Azimuth motor got a flat spot because the worm gear was adjusted too tight. It is a 24 tooth nylon straight gear, very small- only about 1 cm across, but if this gear isn't working...


Below is the contact information for Meade parts. They are the only reliable source unless you know a local dealer that you can trust.

http://www.meade.com/support/contact.html
Jerry G.
Meade Instruments Corporation
6001 Oak Canyon
Irvine, CA 92618

(800) 626-3233 (U.S.A. Only)

Fax: (949) 451-1460


Apr 30, 2008 | Meade ETX-90 (48x90 mm)

1 Answer

Elevation motor stopped working....


You might look at the Jan's Meade lx90 site.
http://hometown.aol.com/kewtasheck/index.html
I have the same problem.

Feb 07, 2008 | Discovery Channel Meade 8" LX90-GPS...

1 Answer

Slew problem


You did tighten the DEC knob? If you did the altitude gears (a worm gear) is not engaing properly. You can either return it to Meade for repairs or attempt them yourself.

I would also check that you have fresh batteries and that the UP button on the hand controller is not broken.

Dec 28, 2007 | Meade ETX-70 (240 x 70mm) Telescope

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