Question about Meade ETX-90 (48x90 mm)

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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 then the azimuth motor makes a good doorstop!! Who knows where to get replacement parts for these badly designed telescopes?

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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


Posted on Apr 30, 2008

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1 Answer

Repair


There are no adjustments for this machine. Chances are that the plastic gear that is driven by the worm gear has a spot that is worn down and when worm gear hits this spot, it does not drive . Replacing gear is the only remedy. Good luck.

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I have a KitchenAid stand mixer model KT2651X. It recently ground down the worm gear follower, which I purchased a new one along with a new worm gear because this is not the first time it ground down that...


It is not a good idea to modify anything in the unit to make part(s)
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1 Answer

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

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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).
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