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 (firstname.lastname@example.org) 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 (email@example.com) 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, MikeMike 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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