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HI! I own a Meade ETX-90
By maraterese on Jun 29, 2009
HI!
I own a Meade ETX-90 telescope. The right ascension drive does not engage. Do you have any troubleshooting suggestions on how I might go about fixing it?
Best,
Mara
Comments:
Jul 01, 2009
- Hi there! thankss so much for following up! yes - you are exactly right about the sounds it makes - I think this is precisely the problem -- I am however looking for ways to avoid sending the telescope back to Meade, if at all possible. Is there any easier fix for this? I took it to Company Seven in Maryland -- a highly reputable shop. They won't touch it. Any suggestions are welcome. MaraClarification Request
Posted by erichidle on Jul 01, 2009
The RA drive is the axis that rotates the base of the mount, is that right? It is not the axis that rotates the OTA in the fork? There are often issues with the low-end Meade mounts, both Alt-Az and RA-Dec. They use cheap nylon plastic gears and jackscrews that can get brittle and crack. It is also common for the jack screw to become disconnected from the motor spindle, preventing it from turning the axis gear. I have a DS series mount that has the same kind of problem where the computer tried to rotate the OTA beyond the limit stop in the Altitude axis, and it actually backed the jack screw into the motor, crushing the jack screw. Does your mount make any popping or cracking sounds when you try to slew the RA axis?
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