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Crunch/click sound while printing, possibly in print head?

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Hi, I'm new to um3 and have been lurking in the forums since getting my machine. You guys have been a great help thus far, but I can't seem to figure this out now.


I've tried a few things suggested in what I thought were similar posts here. It sounds like a crunch or click when the print head is moving, and from what I can tell, it sounds like it is coming from the print head and not the side rails. I've got a link to the videos below to demonstrate.


So far, I've tried checking the cores for any filament, and cleaning/oiling the rods. It seems oiling the rods helped initially, so I thought that was it, but it's back. I've re-oiled and it doesn't seem to help. Any ideas on what I can try next? I'm thinking of trying to get the bearings directly that were  mentioned in some other posts to see if there is something in there clogging anything when it's moving, but I'd like to see if anyone has had this issue before or other less intrusive ideas.



https://photos.app.goo.gl/QrNuWpET9PbrGI7j2    (around 8 seconds)

https://photos.app.goo.gl/BUGnuvwIDuTBKqMH2   ( most prominent around 15-20 secs)

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