I have a very weird situation. I had my LR3 up and running for quite some time. I had some rubbing on my X axis braces so i decided to print wome new ones and reset all of my bearings on my LR-core. Now, when i am putting it back together the LR-Core is not sotting right on the rails. There is aassive gap and the bearings dont touch the rails. I know this is prbably.something dumb, but what could i be missing? Unless my LR-core grew taller overnight…
I checked the size of the core, the braces, the rail (to make aure they are not bent), the bearings, etc. Nothing makes sense.
I read some other topics and the print of the core is not the issue.
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If you replaced the bearings in the core, did you readjust the 2 at the bottom which set the tension on the rails?
I’m guessing, no…
On the bottom, there are 4 bearings, 2 of which sit in a slot. Tightening those bolts (slowly and carefully) is meant to tighten the core onto the X rails.
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Yes, tightened and loosened.
Pictures? Sounds like something isn’t in the right place.
You were absolutely correct! I didnt worried it was too tight, but it was not tight enough.
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I am still having issues with the core not riding over the braces? I have adjusted the nuts on the bottom, both tightened and loosened. I cant seem to find a sweet spot.
Needs moar sawdust!
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You should definitely check your printer for squareness. The gap is unbelieavably wide and it will not possible for it to make contact with the rails. 
Oh, idea: maybe the beam is upside down? The rail that is at the bottom might be the top one!
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Not an LR3 user, but would using the wrong brace size for the rail size cause this issue? e.g., Using the 25mm braces w/ 23.4mm conduit.
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I bet you have a winner there!! Bet they are incorrect since there is only one core size!!
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Here’s the clue for me - the brace and the tube should be a snug fit. This air gap says the tubes are undersized (or the braces the wrong size) or alternatively there’s some inconsistency in both.
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You all are very good. I will check this.
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