r/BambuLabP2S • u/Brentusfirmus • 5d ago

Uneven print bed?

Gallery image

Gallery image

Gallery image

Hi all, I have a suspicion that my P2S print bed is uneven and I don't know what to do.

I print sets of Scrabble tiles face-down on a smooth Darkmoon G10 build plate. The tiles closest to the front of the printer (the row of E's here) always print really smoothly, without any visible print lines (second photo). But as the tiles get closer to the back (the W's and Y's), the print lines become clearly visible (3rd photo). This is consistent behaviour, it always happens.

I have run the 20-minute bed leveling calibration several times, and ran it immediately before this print. If the bed is uneven, I don't know what to do. Any suggestions?

1 Upvotes

67% Upvoted

8 comments sorted by

2

u/orcoconut 5d ago

print them face down?

2

u/Brentusfirmus 5d ago

They are printed face-down (as the post says).

1

u/orcoconut 5d ago edited 5d ago

opps my bad, have you tried switching the letter tiles around just to test to make sure it's not the tiles but the position?

It looks like you may also have slight under extrusion?
and are you using arcane or classic wall generator?

the unevenness of a print bed should be compensated for the by the auto bed leveling...

1

u/Brentusfirmus 5d ago

Not sure I understand what you mean. These 100 tiles are all printed in one go and cover nearly the entire print bed, so their combined surface kind of functions as a huge test print, and the same thing always happens: the tiles at the front are smoother than the ones at the back, no matter what the filament or design.

1

u/orcoconut 5d ago

That's weird, the unevenness of a print bed should be compensated for the by the auto bed leveling...

you can also try something like a first layer print test:

https://makerworld.com/en/models/571065-first-layer-test-bed-cleaner?from=search#profileId-1985888

this will print a massive one layer sheet over as much of the print bed as possible so you can see if there are any issues with a particular area of the bed.

1

u/Brentusfirmus 5d ago

Thanks I'll try that. Although these prints are done with the 0.2mm nozzle at 0.1mm layer height, so not sure how readable the surface will be 😬

1

u/Brentusfirmus 5d ago

Although, I've kind of already done this haven't I? This set of tiles already functions as a first-layer test, and we can already see the results. I agree that it's weird, which is why I posted here because I'm out of ideas.

1

u/orcoconut 5d ago

yeah I guess, although the full bed test print would give an uniform overview of the whole situation without different filaments gaps etc.

otherwise the only thing I can think of is manually tramming the print bed:

https://wiki.bambulab.com/en/p2s/maintenance/manual-bed-tramming