I finally got my 30X30 Longmill MK2 set up after almost a year! I live in Arizona, so it gets very hot in my garage. I finally got a Mini Split installed so I was able to finish setting up. I have a squealing noise when move the x axis when it gets about halfway along the way. That’s either left or right and not in the same spot. I have adjusted the rollers so I can turn them with my fingers. I was going to post a video but it says new subscribers aren’t allowed.
The only time I had something similar was when the screw fell out of the X-Axis anti-backlash nut (the original black delrin ones, not the new spring loaded white ones). It was pinched between the gantry and the X rail so every time it moved on X it would scratch the X rail and make a noise.
If that’s it then reinsert the screw and check all of them them from time to time to make sure they haven’t come loose again.
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When was the last time you lubricated the screw? I recently did maintenance on my MK2 and a noise went away. Not sure if it was the same sound you had, but lubricated both X and Y screws (after cleaning) make a huge difference.
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