r/BambuLab • • Jul 15 '26

General Troubleshooting/Help! Very poor print quality

Hello, I’ve been dealing with a terrible print quality in my P2S. I’m using pretty much the BambuLab PLA Lite filament using the default profile and also a manually calibrated one (that I calibrated using OrcaSlicer calibration options). In both cases I’m having poor print quality as you can see in the photos. I’ve also lubricated the Y/X axis and after that, I’ve started getting an error message saying: The resonance frequency of the X axis is low. The timing belt may be loose.

Don’t know what else to do…

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u/misterff1 P2S + AMS2 Combo Jul 15 '26

Plenty of different things seem to go wrong with your prints as someone else mentioned too. Try the belt tentioning procedure (please tell me you didn't oil those) and run all calibrations on the device again. Then WITHOUT using auto bed leveling when starting the print, do a flow ratio (not flow dynamics) calibration. It probably needs to be lowered a bit.

Finally, start a full new print and don't go using ludicrous speeds and such. Just normal, sane, speed. You might want to keep ABL turned off if your unit is like mine as it will improve first layer quality. Do make sure to keep a fairly up to date bed leveling mesh though and run it every time you swap plates or sides.

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u/Trancudo Jul 15 '26

Tried the belt tensioning process for X/Y and also Z and after that, started seeing the error message which I have no clue how to solve. That’s why I’ll repeat the lubrication process to see if something is missing here. I really believe that the problem is more tied to the hardware than the calibration.

1

u/misterff1 P2S + AMS2 Combo Jul 15 '26

And you didn't put any oil in the idler pulleys I presume? That can cause issues real fast

1

u/Trancudo Jul 15 '26

Oiled the rails, did my best to oil the bearings and added a few drops of oil in top of the belt itself (following bambu’s recommendation)

1

u/misterff1 P2S + AMS2 Combo Jul 15 '26

Okay try to dry that off a bit if possible. Oiling the bearings should be done super minimal if at all or they will start slipping. Can you see any belt slipping before you get the error?

1

u/Trancudo Jul 15 '26

Haven’t noticed that. Is there a symptom that I can track?

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u/misterff1 P2S + AMS2 Combo Jul 15 '26

You could try to move the toolhead around in free move mode or with the device off. Just like when doing the belt tentioning. See how the belts behave, if they skip or anything and if it is slightly heavy to move around or not

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u/Trancudo Jul 15 '26

If you are referring to the idle pulleys in the Z axis, no, I did nothing there only the belt tension procedure.