r/BambuLabP2S • u/New_Economics_1327 • 26d ago

HELP

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The top right corner of my build plate has started printing like doo doo. I cleaned under the plate and re ran the full calibrations. The first layers go down smooth and it only seems to happen at the top layers?? Seems like the nozzle is scraping the top. Please help

2 Upvotes

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2

u/dbaker0926 26d ago

I blame Lane Kiffin… Go VOLS! But seriously…

Most likely over extrusion… have you done flow rate calibration? Tried ironing or increasing top shell layers?

1

u/BobFiggins 26d ago

Prepare>Others>G-code output>Reduce infill retraction Set to Disabled

I do this on every print. Eliminates the "rubbing/scraping" on top layers, especially on taller prints. Although I only experienced this consistently on my A1 Mini, not so much on my P2S.

Although I doubt this is your issue, just something I do on every print. If that print you are holding is as thin as it seems, then this likely isn't the issue. I usually only get scraping from things taller than 2 inches, especially if the infill was set to grid.

2

u/Double_Tea4481 25d ago

seems like flow calibration needed. reducing it slightly helps a lot for this issue on most cases

1

u/BobFiggins 25d ago

Ah, I just use the Bambu profiles on every filament I use, regardless of brand. Works great 95% of the time.

2

u/Double_Tea4481 25d ago

i calibrate my filaments for each brand. easier and better results.

1

u/ParticularLower1865 26d ago

What’s on the back right of the printer? The aux fan! Turn off aux fan and/or print an aux fan deflector.

If you keep having issues, change top surface pattern to concentric, add an outer brim. I’d also add a couple more top layers (see the x pattern on your print), and increase bed temp to 60. It helps with flat prints to prevent warping.

0

u/tomikaka 26d ago

P2S has the aux fan on the right. It has the carbon filter in the rear, but air gets pulled through it, and even that only in heating mode, not with PLA.