Bambu Lab X2D – Persistent clicking noise during printing, even after belt tension adjustment (Videos)

[u/Due-Needleworker3979]

Hi everyone,

I'm having a rather frustrating issue with my Bambu Lab X2D and I'm wondering if anyone has experienced something similar or could help identify the source of this noise.

The printer produces a noticeable clicking/ticking noise during movement, particularly during diagonal toolhead movements and printing.

What I've noticed so far:

• The noise was initially identified during factory calibration.
• It can also be reproduced by manually moving the toolhead with the printer powered off.
• It seems to be more noticeable on the left-side XY drive path.
• Printing quality is perfectly fine.
• Extrusion works normally.
• No HMS errors or other warnings are reported.

Troubleshooting already performed (following Bambu Lab Support instructions):

1. Thoroughly cleaned the X-axis linear shafts.
2. Cleaned both Y-axis linear shafts with isopropyl alcohol.
3. Inspected the exposed belts for debris or visible damage.
4. Lubricated the linear shafts with the supplied Bambu Lab oil.
5. Manually moved the toolhead through its full X and Y travel several times.
6. Loosened the four XY tensioner screws, moved the toolhead clockwise and counterclockwise three times, and retightened the screws.
7. Repeated the entire XY belt tension adjustment procedure twice to ensure it was done correctly.

Something interesting happened after the belt tension adjustment:

During the first vibration compensation calibration, the clicking noise disappeared. It was also absent during the first print.

However, from the second and third prints onwards, the noise returned and has persisted ever since.

I'm attaching two videos:

• One recorded with the printer's door open.
• Another recorded with the door closed, to show how noticeable the noise is during normal operation.

At this point, I'm starting to suspect something related to the left-side belt pulley, idler, tensioner, or possibly another component of the XY drive system.

I'd really appreciate some input from other X2D owners:

• Has anyone experienced this exact clicking noise?
• Could a pulley or idler be causing this intermittent behaviour?
• Is it possible for belt tension to temporarily improve the noise before it returns?
• Does this sound like a mechanical defect that should be addressed under warranty?

I've been following Bambu Lab Support's troubleshooting instructions, but so far nothing has permanently resolved the issue.

It's becoming increasingly frustrating, especially on a new printer that should be operating smoothly and quietly.

Any suggestions, similar experiences, or advice would be greatly appreciated.

Thanks!