Question about Meade 8" LX90 LNT Schmidt Cassegrain Telescope with SmartFinder w/ FREE UPS

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Locking screw elevation dec locking screw on the fork arm has came loose cannot refix

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You will need to check out the clutch mechanism in the fork arm. Refer to this web site for disassembly pictures.

http://jan.eaglecreekobservatory.org/

Look under Declination adjustment link off the main page.

www.scopestuff.com
sells an upgrade clutch kit that improves the clutch. However if something is broken inside then this must be fixed first. Meade will want the scope returned. They usually do not sell parts; but sometimes they do sell them, so call Customer Service here:
http://www.meade.com/support/index.html

Posted on Dec 04, 2009

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The blade on my new skil 3310 won't raise. It came preassembled & has never been used, but the elevation wheel feels locked. I can adjust the angle, but turning the knob doesn't raise/lower blade.


Just as a question and I am not being smart you know that the wheel to raise the blade work counter clockwise.
The other thing you need to check is in your manual here is the part how to adjust the blade for raisin/lowering.
After five hours of operation, the blade elevation/tilting mechanism should be checked for looseness, binding, or other abnormalities. Disconnect the saw from the power source, turn the saw upside down and pull up and down on the motor unit. Observe any movement in the motor mounting mechanism. Looseness or play in the blade raising screw 1 should be adjusted as follows (Fig. 55): 1. Loosen nut 2. 2. Adjust the nut 3 until it is finger-tight against the bracket 4, then back off the nut 3 1/6 turn. 3. Tighten nut 2. The maximum allowable play of the screw rod 1 is 5/32" (4 m). Place a small amount of dry lubricant (such as graphite or silicon) on the screw rod 1 at the thrust washer 5. Do not oil the threads of screw rod 1. The screw rod 1 must be kept clean and free of sawdust, gum, pitch, and other contaminant's for smooth operation. NOTE: If excessive looseness is observed in any other part of the blade elevation mechanism or tilting mechanism, take the complete unit to an authorized service center.

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1 Answer

Renault trafic stuck in second gear


There is one of 2 problems that will give this indication. The first is the gear lever end in the shift rail has moved out of the slot and is behind the slot and not moving it . This can be checked by removing the lever mount from the top of the box and physically moving the shift rail back into the neutral position then replacing the gear lever back into the selector gate and moving the rail again.. The second possible fault is that the selector fork has come loose on the rail and is not moving the gear (just sliding on the rail) If that is the case the box will have to come out unless you can see the selector fork and the lock screws from the top of the box when the lever mount is removed.. If you can move the selector rod forward and tightening up the lock screw then pulling it back to neutral. Repeat until the fork is back in neutral position and lock it up. Most lock screws have a hole and there is wire tied around the shaft to prevent the screw coming loose. If the box has been reconditioned at some time then it is possible that the person doing the job neglected the wire bit.

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1 Answer

I have an older meade LX2000 EMC 10


The main problems encountered with the mechanics of the telescope centre around the mechanical swarf, grease compound, the liberal use of grease and the quality of machining of the main DEC and RA gears.
1. Remove the motors from the telescope. Be careful when removing either motor as there is a compression spring between the motor mounting frame and the worm shaft assembly.
The RA motor is located under the telescope body, removing the 4 screws and 2 Allen bolts will allow the bottom cover to be removed, thereby allowing access the the 2 Allen bolts holding the motor in place. Unplug the motor from the main PCB before removal.
The DEC motor is in the the fork arm containing the clutch and fine DEC adjustment control. (Never to be used with power applied to the scope). Remove the 3 small Allen screws holding the plastic cover plate in place and the DEC clutch knob to allow access to the motor. Remove the RJ45 connector located inside the telescope fork arm. Then remove the motor by unscrewing the 2 Allen bolts holding the motor in place.
2. Remove all grease from the motor worms, especially around the RA motor's magnetic pulse detector and the permanent magnet built into the worm shaft.
3. Remove all grease from the main DEC and RA gears, making sure to clean into the gear teeth.
4. Lightly re-grease with a Molybdenum Disulphide based grease (Castrol MS3 is great for this application if you can get it)
5. Assemble in reverse order. But before doing so, carry out the electrical adjustment above then, (a) relocate the the RA and DEC control PCB's in the vertical plane thereby gaining access to their respective backlash Allen screws. Adjust for 20thou max clearance when in final position. Note:- the DEC adjustment screw has to be replaced for a longer unit complete with a thin bolthead as this adjustment has to be carried out with a spanner....there is no room for an Allen key adjustment here.
6. A drop of Loctite must be applied after adjustment.
7. The final part of the process is to run in the gearing. Apply 12 volts to the motor wires, either at their respective plugs or to the motor direct. Allow to run for 2 to 3 hours in each direction by reversing the battery polarity to bed the teeth engagement. Remember to release the clutches.

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1 Answer

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1 Answer

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1 Answer

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1 Answer

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You have a LARGE Meade telescope. This should be an easy fix if you can disassemble the fork arm and get inside.

First I would contact Meade customer service to see if they have a manual that shows disassemble instructions. If not I would join the Yahoo LX200 forum and look for help there with an owner of the 16 inch model.

http://www.meade.com/support/index.html

Just search in Yahoo Groups for the LX200 forum.

On smaller scopes the DEC motor is held on by two spring loaded bolts, probably one has become loose?

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1 Answer

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