Weasner's LXD55/75 Achromatic Refractor Models Feedback Page

ACHROMATIC REFRACTOR MODELS FEEDBACK

Last updated: 19 March 2007

This page is for user comments and information of a general nature or items applicable to the LXD55 and LXD75 Achromatic Refractor models. If you have any comments, suggestions, questions or answers to questions posed here, e-mail them to me and I'll post them. Please use an appropriate Subject Line on your message. Thanks.

Subject:	re: LX75 - AR6
Sent:	Monday, March 12, 2007 09:18:54
From:	richard seymour (rseymour@wolfenet.com)
A number of tear-down articles and "tuning" postings for the LXD
mounts are accessible through a number of the Yahoo groups.

Ones which would directly pertain are:
http://tech.groups.yahoo.com/group/LXD75telescopes/
and
http://tech.groups.yahoo.com/group/RoboScope/

The LXD55 group uses a different mount-head, but the tuning
techniques are similar:
http://tech.groups.yahoo.com/group/LXD55telescopes/

Look through the Files and Photos areas of those groups,
plus use the search and (egad!) directly post to ask questions.

Have you checked the end-play on your worm?
(that's the worm's ability to move along its own length in its bearings)
That should be as small (if not non-existent) as possible

good luck
--dick

Subject:	LX75 - AR6
Sent:	Wednesday, March 7, 2007 07:05:19
From:	Michael Hess (mthess60@earthlink.net)
I just got through looking at your site. Very nice with lots of helpful
stuff.  I just received a Meade AR6 on the LXD75 mount. After assembly,
one of the things I noticed was an excessive amount of back-lash in the
RA. I am familar with eq mounts but I have tried about everything I know
to tighten up the tolerances between the worm and drive gear without
causing too much friction for the auto star motors to run. I have taken
off the motor box and adjusted the play between the worm and main gear a
number of different ways.  Is there some info or tips somewhere
regarding this issue on this mount that you might know about ?  Right
now there is enough backlash in the RA that I don't think the scope will
be usable. Thanks, Mike

Mike here: First, have you done a CALIBRATE MOTOR and TRAIN DRIVES on the AutoStar? If so, you can further adjust the backlash ("percentages"); see the article "Calibration, Training, Percentages" on the Helpful Information: AutoStar Info page. If that doesn't help, you might look through the "LXD55 Tips and Tricks" and "Gear Box Maintenance" documents in the "LXD55 / LXD75 Information" section on the my LXD Site. I don't recall which of these might have information applicable in this case.

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