A1 Mini Failure - scrape off prints

Bambu Lab A1 Series Troubleshooting
1

So the issue has started since yesterday after having a similar issue that was resolved with a calibration of the machine.

It has worked for three weeks now without any issues. After not having printed for a few days, this is the result…

The issue is as you can see in the photos: Filament sticking (mostly) but getting scooped up by the nozzle and ripping everything off.

As well as not sticking 100% to the plate.

Weird this also is that the first two lines (see one of the pictures) aren’t wide to thin anymore. They are just thin and don’t even stick well.

These results in the phots are from the 2 Orca Slicer Calibrations.

Things I have done and tried (some multiple times):

  • Wash the plate with dishwasher soap, dried with paper towels and without putting any fingers on it
  • Calibrating the machine through the machine itself as wel as through the Orca Slicer
  • Unclogging the nozzle and whole thing above it by dismantling it and the AMS Lite connection on top
  • Drying the filament to 25% moisture
  • I only (and have only been using) Matte PLA from Bambu and is detected by the A1 unit.
  • I tried a factory reset
  • I also tried recalibrating everything

I also tried different prints, different settings, different a lot.
Nothing works.

Settings:

  • 220° nozzle
  • 65° build plate
  • Textured PEI Plate
  • Standard settings, I don’t like fiddling with things if they just work
  • 0.20mm Standard profile > fails
  • 0.16mm Optimale Profile > fails as well

All tips are appreciated, since I’m out of ideas completely.

Could it have to do something with the 'blob 'detection setting?

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IMG_6329
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2

Is the printer actually doing bed leveling when you start a print?

3

Thanks for replying Flint.

I do a calibration before every print.
So bed leveling and vibration compensation included.

Anything else I can try?

4

This is a benchy up until layer 30, maybe this helps?

IMG_6335
IMG_63351500×2000 434 KB

5

Did You ever touch screws under the plate? I know some peoples who tighten them. If You have done it then Your bed leveling is wrong even automatically and only thing that can help is bed tramming: A1 mini Bed Tramming | Bambu Lab Wiki

6

Did you also tried to use a different nozzle to see if you get the same results?

7

Tried this with the following result for the benchy print (stopped after 30 layers)
As you can see the first two lines are still not right either.

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IMG_6341
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8

I tried a different 0.4 hardened steel and then also the 0.4 stainless one.
So three nozzles total. All give the same result.

9

If you recently updated the firmware you could try downgrading it again. That seems to have solved problems for some people. I think only bambu handy app is capable of doing that atm.

10

Tried that, same problems persisting.

11

Tried a print without the AMS Lite, since it seems to be stuck and underextruding filament. See here: Dropbox

This is the result: Dropbox - IMG_6348.MOV - Simplify your life
Still not perfect, but a lot better at that.

Still not a clue on how to fix this…

12

First picture looks like the pressure advance calibration, is it turned on under filament settings and what is the value?

13

It’s not on and the standard value it seems to be on is 0.02
Do I try that on the standard value?

14

And any reason you can think of that without AMS it’s just fine, but with AMS all screwed up?