LXD75..RA dissassembly, grease
Posted 17 October 2008 - 03:21 PM
It is totally interfering with setting up my RA worm properly...loose enough in the draggy orientation is backlash city in the not dragging orientation.
In addition, I can hear the motor change speed when it passes through this zone. In a rate based system lacking feedback on the actual axis and using open loop position calculation, this is the kiss of death for positioning accuracy.
Where is the danged RA nut hidden...under the polar scope circles or something? I suppose I'll find it, I just prefer not to screw something up dorking around with it.
Grease...their grease is nasty, sticky, and gritty (used mount). I have a NAPA up the street in this metropolis of 1000 souls. White lithium OK?
Posted 17 October 2008 - 07:52 PM
Now I can unscrew the RA nut partway and the axis comes loose, but I can't get it off over the polar finder housing and I can't find a lockscrew for that piece and it won't unscrew.
Posted 18 October 2008 - 08:20 AM
Posted 18 October 2008 - 09:34 AM
Posted 18 October 2008 - 10:31 AM
Why the H E double toothpicks they slop this thing with locktite when the RA collar is doing all the work, I have no idea. I will not be locktite-ing it back on.
Oh well, as a bonus at least I also damaged the chrome hour circle.
So I cleaned out all the sticky grease, and replaced with white lithium since I hadn't seen any replies until this morning. Now that I know how to get it apart and the finder stuff is pre gouged for my convenience, I'll see how that works and be able to go to another grease fairly easily.
I am convinced my RA drum gear is slightly out of round, by the way. I had to back way off on the worm in order to not have it binding, and it's noticeably stiffer in two places 180 degrees apart.
Posted 19 October 2008 - 09:36 AM
Oh, and Meade is famous for using LockTite!
Posted 19 October 2008 - 10:39 AM
Posted 27 June 2009 - 09:30 PM
Posted 28 June 2009 - 12:56 AM