worm gear adjustment
Posted 04 July 2011 - 03:24 PM
Posted 05 July 2011 - 08:32 AM
I noticed in one of the yahoo groups a post by a guy who modified the worm gear housing for his lxd 75 and added some ball-bearings. He was going to put some photos and step-by-steps on the site after checking it all out, but never did as far as I can tell. His initial outcomes were positive from what he said. Are you familiar with some kind of modification like that?
Thanks for any input.
Posted 13 July 2011 - 10:04 AM
It sounds to me like the three worm tension screws are not correctly set-up [these screws interact and the adjustment is touchy]. Also the tension adjustment on the ends of the worm drive screw might be too tight. Those are the only adjustments that control backlash in the LXD75. The three worm tension screws are the most critical and the most difficult to get right.
When properly set-up you should be able to turn the worm drive gear with your fingers over the full slew range without binding.
Posted 13 July 2011 - 04:53 PM
That is what the gear training excersize is for, to tell the brains of the scope how much backlash there is.
Hope this helps.
Posted 13 July 2011 - 04:58 PM
Posted 24 October 2016 - 04:48 PM
I’ve also heard mention of certain gears (I’m assuming it must be the worm ring-gear) being out of round from the factory. The result of this is sloppy backlash in one zone and tightness 180° around from that. In such cases the best you can do is kind of average things out by trial and error – a little sloppier-than-desired in the ‘loose’ zone, so it’s not too tight at the other end of the spectrum. Sound like a royal pita. I hope I don’t have to ever deal with it. But when you’ve got lemons…
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