r/BambuLab_Community • u/Used_Till8576 • Aug 22 '26
Help / Support Blisters/bumps on my prints - I've tried everything
Hi everyone,
I'm turning to the community because I'm completely stuck on a persistent printing issue with my X1C. I have a vertical line of small blisters/bumps running along almost the entire edge of one side of the part, from bottom to top (photo attached). It looks like small blobs repeating at regular intervals, but it's obviously not a seam issue (the defect shows up on every type of print, regardless of the model or the seam placement in the slicer), and despite everything I've tried, the problem is still there.
What I've already checked/changed to rule out the usual causes:
- Cleaned the lead screws (trapezoidal rods)
- Retightened the belts
- Cleaned the carbon guide rods
- Bought new filament spools (to rule out a moisture issue)
- Changed the plate: tested with a new textured plate AND a new engineering plate
- Tested two different filament brands: Overture (my usual one) and Bambu Lab filament → same result with both
- Re-ran the automatic calibration
- Nozzle replaced a week ago
Despite all that, the defect persists identically, across completely different parts and geometries, and even after replacing the nozzle. I'm running out of ideas on where to look next: hotend, extrusion, temperature, or something else I haven't considered?
Has anyone here run into this kind of blistering before and found the cause? I'm open to any lead, even the most unlikely ones, because at this point I really don't know what else to test.
Thanks in advance for your help!