Question about Meade LX200GPS Telescope

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Mirror lock the mirror lock won't unlock. The large gear behind the mirror lock knob will not turn

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Possibly the shaft has jammed. Follow this link for a source of good information: http://www.mapug-astronomy.net/AstroDesigns/MAPUG/ArhvList.htm

From their files:
The locking knob has a gear on the inside end of its shaft. It engages teeth on the outside edge of a large metal disk connected to the mechanism that locks the position of the mirror on the central baffle tube. Rotating the locking knob one direction rotates the large disk to tighten the collet on the central baffle. Reversing direction loosens it.
The teeth do not extend all the way around the large disk. So sometimes the locking knob gear jams to a stop before the lock is fully engaged. Soon after the GPS scopes first started shipping Buck Harley discovered that in such cases you can remove the locking knob with its shaft and gear, then reach in and rotate the large disk with your finger. Replacing the locking knob will now allow sufficient rotation to fully engage the lock. If you happen to move the large disk in the wrong direction, then just repeat the process and move the disk in the other direction.
You don't need to tighten the lock down hard. Just a little snug is enough. You should not attempt to use the coarse focus knob while the mirror is locked. Damage to the focusing mechanism could result.
This design is intended to precisely hold the mirror position. So, yes, it is meant to allow effective use of a separate guide scope by eliminating mirror flop when in the locked position.

Posted on May 27, 2008

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How to operate


This is a reflector style scope with a large mirror in the bottom, and a small secondary mirror underneath the focuser. The focuser is on the UP end of the tube as the picture shows in your question.

Simply insert the eye[pieces into the hole on the focuser and turn the knob left or right until the image comes to focus. Practice during the day time on a distant object starting with the eyepiece with the largest number written on it.

Read this--
http://texasastro.org/telescope.php about the types of telescopes.

Objects in the night sky are tiny and many of them are very dim-- the scope must be pointed directly at them or you will not see anything.

Find a local Astronomy club and the members will help you. All of Bushnell's manuals are located on this web site:
http://www.opticsplanet.net/bushnell-warranty.html

www.telescopeman.org
www.telescopeman.us
www.telescopeman.info

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1 Answer

I just had my lx 200 acf 12 inch [new telescope] returned to me from Meade because there was dirt on the mirror. After setting it up I discovered the locking mechanism would not unlock nor could i turn...


You can try removing the focuser and knob -- and see why the LOCK (which is simply a bolt is stuck.

Look here:
http://www.petealbrecht.com/Installing%20Digifocus.pdf

May 21, 2011 | Meade LX200GPS Telescope

1 Answer

Here?s my problem : My scope model is LX200R 14?. I?ve pulled the focuser shaft out of the focuser arm pin. I?ve turned the locking lock knob several turns before putting back the focuser shaft. I...


Steward, this is Joe Lalumia-- I have seen your post on various forums. The 14 inch is different from the other smaller LX200 scopes.

Probably Dr. Clay, and or Andrew on the Yahoo Group LX200 forum will know the answer because they service these scopes.

Post a message there (register for free) and one of them will answer you about that very nice scope.

Clear Skies!

Joe

Dec 14, 2010 | Meade LX200R 14 in. Telescope

1 Answer

Telescope will not focus


Your focuser is broken -- you can buy a replacement here:

http://www.agenaastro.com/Crayford-Focusers-s/140.htm

and here:

http://www.optcorp.com/productList.aspx?uid=&pg=0&kw=focuser&st=2

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1 Answer

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The C8 optical tube has a very large focal range. It should be capable of focusing on objects from 15' to infinity. To focus on object at infinity you have to move the primary mirror foward. You do this by rotating the focus knob CCW. Rotate the knob CCW until it comes toa stop them slowly bring the mirror back by rotating the knob CW while viewing the object. It will snap to focus so don't move too fast yor you'll miss it.

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1 Answer

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The ETX family (and other Meade LX telescopes), use a moving mirror system for focus. The focus knob moves the main mirror in and out. For smooth operation, there is some slack on the central tube that allows the mirror to rock slightly as it moves. That is a normal condition, and the movement is magnified, the greater the magnification of the eyepiece.

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1 Answer

Can't get to focus.


I think that the focus shaft has become un-attached by turning too far. Try placing the telescope facing directly upwards and start turning the focus knob clockwise. A little vibration on the tube will help the mirror to settle downwards. This may get the threaded rod back into the knob.

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1 Answer

Meade LX200R 12" Mirror Lock


The 'lock' is a ring gear that closes a ferrul against the draw tube to restrict its motion. It is not intended to be a hard lock. Try the Meade Advanced Users Group for further tips.
http://www.mapug-astronomy.net/

Jan 20, 2008 | Meade 8" LX90 LNT Schmidt Cassegrain...

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