Question about Meade LX200GPS Telescope

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Meade LX200 10" - RA Gears slip when mounted on wedge (Milburn)

I have been using my LX200 10" for several years in Alt/Az position and have had many pleasurable viewing secessions and mediocre imaging secessions. I decided to build a concrete pier mount and Milburn wedge setup to advance my photo experience. I mounted my scope on the wedge and began my alignment process. As soon as the scope started slewing (btw the ra and dec directions are reversed so I had to stop the slewing) and then started slipping. The worm gear must have partially disengaged under the weight of the scope. the only accessories mounted to the scope were my 10x50 viewfinder and a newly added 80mm apo for auto-guiding. No cameras or counterweights were even mounted. I took off the base cover to inspect the gears for any damage do to this slipping. The gears appear to be in decent shape however I did not disassemble and clean the grease off to thoroughly inspect. I do not see any shavings or chips etc. so I believe there is little to no damage. I am suspecting that the spring tension on the worm gear/ drive motor is the culprit. Is there a Meade (or alt source) upgrade for this condition.

Thanks,
Barry


Those who always look up, find the wisdom to look beyond...
BC

Posted by on

  • sweiller Feb 28, 2009

    Hi all,

    I saw also a gear slip tonight (about 15°).
    There is nothing added on the telescope (LX200 Classic 10")

    What to do please ?
    Best,
    Sylvain


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The problem is the addition of the 80mm telescope to the assembly. The telescope is now out of balance, and places extra weight off-center as the position chages. Too great an off-balance will cause the main gears to 'jump' the worm teeth. The solution is to restore balance by adding counter weights as needed. Loosten the axis locks (carefully) and see which direction it wants to move. To balance my LX, I used a small bag with lead buckshot to determine how much weight was needed and where to achieve balance. Then I added fixed weights to the mount. Once this is done, the scope should track correctly.scopestuff.com has balance kits at reasonable prices.

Posted on May 22, 2008

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

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

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Then you will either have to send it back to Meade for repairs, or open the bottom of the base, and look inside and see if the AZ worm gear is actually meshing with the motor. It could have come loose.

Meade customer service:
http://www.meade.com/support/index.html

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1 Answer

I would like some information on balancing a


Is this mounted Alt-AZ or is it on a wedge.

If Alt Az probably all you need is a rail and weights. If mounted on a wedge you may need a 3D weight arrangement.

See these web sites-

http://sctscopes.net/SCT_Tips/Balancing_an_SCT/balancing_an_sct.html

http://jan.eaglecreekobservatory.org/balance.html

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