Meade LXD55 User Manual download pdf (Page 2)

Additional Items you will need:

o 3/16” Allen wrench to loosen screw holding RA

motor assembly to mount.

o 5/32” Allen wrench to loosen screw holding DEC

motor assembly to mount.

o 1.5mm Allen wrench to loosen the 4 screws

holding motor housing to motors.

o Small Phillips head screw driver

to fit the 4 screws holding the

black motor housings together.

o 1 - 2 hours time and patience.

o Cleaning alcohol, cotton swabs,

etc.

o Small towel or pad on which to work.

Procedure - Set Up:

o Read entire directions BEFORE starting)

o Move the mount to a comfortable position next to

your work space - make yourself comfortable - the

conversion takes about 1 - 2 hours depending upon

your comfort level with tools and experience. Verify

that you have all the partsneeded as listed above.

Lay them out on the table so you are not hunting

for them during the conversion. Some of the parts

are very tiny.

Tip: A borrowed muffin pan from your wife's pantry makes a

good parts sorting bin while you are working.

o Disconnect all power from the mount.

o Unplug all connections at the LXD control panel on

the RA Drive.

o Remove the OTA and dovetail from the mount.

o Remove the Counterweights and Counterweight

Shaft from the mount.

o Loosen the DEC and RA Locks - Put the mount in

Polar Home Position.

Note: Now would be a good time to test / adjust your worm

toalignment to minimize slop and play and to clean them of

the stock grease. Re-lube with a high quality lubricant. This

is a tedious adjustment but one of the most rewarding when

it comes to tracking, slewing, go-to's, etc.

Adjusting The Worm:

After removing the mo-

tors, remove the worm

housings from the mount

by unscrewing the center

of the three screws

shown in the picture.

There are also two screws

accessable from the top

of the saddle.

Note: The three screws pictured final adjustments for align-

ment of the worm.The center bolt screws into the mount to

pull the worm against the worm gear. The two outer bolts

adjust the angle of the worm. Ideally, the center axis of the

worm shaft should be tangent to the circumference of the

worm. Do NOT touch these bolts while removing the worm

housing as they are adjusted from the factory. Only after

reinstalling the worm housing to the mount should you make

fine tune adjustments with the two outer bolts to adjust the

“tilt” of the worm relative to the worm gear. The two outer

bolts work in a push-pull arrangement with the center bolt.

Tightening the two upper bolts will pull the worm housing

slightly upward which will also tighten the worm against the

gear. I found that a thin shim washer of nylon or brass over

these two upper bolts between the saddle and worm housing

aided in fine tuning this adjustment.

This is a picture of a stock worm in it’s housing. The

large brass nut on the end opposite the gear is for ad-

justing the amount of

“play” of the worm. Re-

moving this nut ex-

poses a threaded

sleeve which holds the

worm in place. Adjust-

ing the inner sleeve will

be the critical adjust-

ment. The worm does NOT have to “spin” freely - just

turn in a smooth non-binding motion.

If properly adjusted, you should be able to grab the top

of the mount (saddle) and feel no movement if you try

to twist the mount around the RA or DEC axis.

Clean out the stock sticky grease and re-lube with

Lubriplate or SuperLube. You should be able to hand

turn the gear (or pul-

ley) on the end of the

worm shaft with a

smooth non-binding

feel. When the gear

moves, the mount

should move - no slop

- no loose movement.

Push Push

Pull

PullPull

Shim Shim

Brass

Nut

Optional Tools

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Meade LXD55 User Manual Page 2

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