P1S - Bad print quality all of a sudden

Bambu Lab P Series Troubleshooting
1

Hello dear community,
I’ve had a P1S with an AMS for a few weeks now. So far, I’ve been extremely satisfied. But suddenly, I’m getting very poor print quality in terms of surface finish (see pictures). I can’t explain where this is coming from. It’s not limited to one filament, but happens with all filaments. What I’ve tried so far:

  • Cleaning the nozzle (did not replace it)
  • Cold pull
  • Checked the feed line
  • Firmware downgrade and upgrade
  • Done all available calibrations (on the printer and software)
  • Print in silent mode
  • Printing via app and PC
  • ONLY Bambu filaments and setting are used
  • Tried adjusting the flow ratio
  • Followed bambus guide: “Under extrusion”

At this point, I really don’t know what else to do. When I dispense filament through the printer, it comes out in a straight stream and actually looks fine. Do you have any ideas?

White Filament
White Filament1600×758 184 KB

Black Filament
Black Filament1637×1707 301 KB

Green Filament
Green Filament1568×1611 329 KB

Bad quality
Bad quality1920×2570 400 KB

2

What nozzle size are you using and have you checked to make sure that the printer (via the display) has the same nozzle size selected?

3

I use the standard 0.4mm nozzle. I checked the software and on the printer itself (0.4 stainless steel).

4

Have you tried a factory reset of the printer? Sometimes that cures the oddest of problems.

1 Like
5

Justs did one right now. Same problem. But this time i started a benchy and around 12mm it just printed in the air. Either the Z-axis is completely off or there were no filament extruded.

benchy
benchy1920×1096 204 KB

6

Have you taken the extruder part and cleaned the gears, etc? If you have printed much of the abrasive materials you may need to replace the extruder with a hardened steel set.

7

Thats the point i don’t understand. I haven’t printed a lot since i got the printer (78 hours according to the settings). And i printed only standard PLA and once PLA Matte from Bambu. I can’t imagine that the extruder gears have to be cleaned or replaced after this kind of usage. But i will look into it.

8

There could be some foreign material in the extruder, I have had that happen to me. Have you tried clearing the nozzle with the needle supplied in the accessory kit? If you have a spare nozzle, swapping them out would eliminate that as a possibility.

9

So i decided to change the nozzle. I was a bit hesitant because of the low print times and the fact that i cleaned the nozzle a couple of times. But this has done the trick this far. Everything is back to normal now. Thanks for all the support. Next time, this will be the first thing i do :grinning:

1 Like
10

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