Weird noise/vibrations, possibly nozzle scratching the print?

Bambu Lab X1 Series Troubleshooting
1

Hello everyone! I got the X1C Combo about 2 weeks ago and I’ve been largely impressed and happy with it.

On my last print I noticed some layer shifts, and after reading online about the issue, I redid the belt tension and cleaned the tool head rods with 99% alcohol, then ran calibration - as seen in Bambulab official YouTube videos.

Ever since I did that, the printer started making weird noises/vibrations. It sounds to me like at certain parts of the print, the nozzle is scratching the print. I did not have this issue before. I was worried that I might’ve over tightened the belt tension screws, so I redid it and ran calibration again but the issue still remains. I’m using Auto Flow Calibration and Auto Bed Leveling for all prints, so I don’t think the issue is with the filament or bed.

I’ve included a YouTube URL for a video of the issue:
Issue video
Please let me know if you know anything about this issue and how to fix it. Thanks!

2

It sounds like the grid infill is making the noise. The nozzle is hitting the infill. Try gyroid infill and see if it is better.

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3

I posted the same thing on Reddit and some people said exactly what you said. I tried the same model but changed the infill to gyroid and the issue is gone. Thanks

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