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Update: this hasn't happened at all in the past couple months. Theory: this is temperature related. Question: I think I read someone mention (maybe in this thread?) that cold temps does make this more

Here is a run down on the problem. 1. It occurred after changing out the Ra axis thrust bearings. 2. Polar alignment is via Sharpcap and was bang on at CDW. Just installed the NINA 3-point polar

Michael, Since Peter is in the UK (I think), Sagittarius must be pretty low in attitude (20 degrees?), even as it crosses the meridian. That's a lot of air to see through, so could this be more

That was my thinking, too. The symptoms really fit differential flexure. My back-of-the-envelope calculates that even a pretty loose polar shaft shouldn’t have more than several arc-minutes of slop,

from his piggyback guide scope and it's autoguide camera. But he is perplexed by getting oblong stars in his main camera when he is pointing South like to Sagittarius. When he points to zenith he gets

Hi gang, Yes ..thank you for the detailed parts list. That is very helpful. Peter and I have been discussing his experience and some good ideas came out of those discussions. Among them... (Peter is

David, Can you explain more?? My worm has runout, but I am not sure centering the bearings will help.? How do the washers keep the shaft centered, through preloading?? Why would manual preloading

Such BS. I'll post some images tomorrow of blocks I just bought in. Peter

Eric, I found it to be equal all the way around. Peter

Well, I talked to Tanya at Losmandy and she said that's how all the blocks look. Kind of hard to believe. I said something about the block not being anodized and she said that's how they come in. It

Thanks so much for the parts references, David. Nice to have all this stated in one place. Regards, John

Robert, the Belleville washer is used to keep the worm bearing race centered and eliminate a massive 76 second periodic error I had that could not be guided out.

Well since you brought it up… the Titan wasn’t quite the biggest mount. That would be its predecessor, the HGM200, which weighs 9 lb more and has a rated 150 lb capacity, vs 100 lb for the Titan.

Bob: Correct. On this era of G11 there is no bearing in the worm wheel. Keith

David, Will adding the Bellville spring washer allow you to insert the bearing blocks into the plate?? Do you have 0.013 clearance?? Is 7 lbs of force enough to overcome any imbalance you might

Keith, Boy that is some nasty out-of-square shaft you have there.? I also notice you don't have a bearing in the worm wheel?? Does the worm wheel just run on the brass bearing tube? Michael, I

Wow, that shaft is way out of perpendicular. I wonder how that happened. -Les

Excellent start, Michael! Can you please add these to the definitions database I just created? Just add one row per term/abbreviation in first column, and paragraph description in the second:

Isn't it fun that every day is another IQ test?! My "dictionary" would include these ...I'm sure there are more I left out... Losmandy terms and abbreviations: SLW is the Spring Loaded Worm G11 is the

Hi Eric, You raised an interesting question ...could you operate the axis with the shaft removed? I tried this recently on my GM8. .I was surprised to find the worm would jam in the ring gear with the