Need help with A1 print quality

[Zaphod_Joe]

I’ve had my Bambu A1 just over a month and am having issues with print quality. It started with a clogged nozzle then got a message about the resonance frequency of the X axis being low so I followed the directions of loosening and retightening the screw on the back of the print head and it fixed that. Now the prints have weird dots on them. I will include a bunch of pictures.

There are little dots all over the surface. Sometimes when it completes the layer and moves fast to go to a new area it hits the surface and leaves a groove, its not a lot and never on the final layer. I have some side by side photo’s of the same item printed a week ago and a new one this week with the issue.

I have the Bambu A1 with the newest firmware. I have all Bambu Basic PLA filament. I just opened a PLA Basic Black a few days ago. I removed the new 0.4mm nozzle and put the old one back and did a cold pull to clear that one to see if that was the issue but it still does it in both nozzles.

I have never dried my filament but its under 50% humidity and didn’t have the issue all month until this new roll but I just opened it and I printed other colors and had issues as well.

Swatch with gaps in top layer (I know its not green I didn’t change the text)

Babo drawer unity, new print on left with dots and print from a week ago on right.

Babo Front Lid new print on left old print from last week on right

Dots or Debris on new print

Gouge where head moved from bottm right to top left to continue left side of layer

[Zaphod_Joe]

I have a Comgrow 2 spool filament dryer I bought from Amazon when I got this last month so I tried that last night. The Bambu site says 55c for 8 hours, this only goes to 50c though so I did 50c for 12 hours over night. It still has black particles. It may be a little better, the only big change I notices was when it did the initial purge before cleaning the nozzle it didn’t have any string hanging down after, which it always did before.

[Zammer3D]

That looks like a flow rate issue to me. Is the auto-calibration running before each print? (It’s one of the checkboxes when starting a print)

[Zaphod_Joe]

No I have done it a few times but not regularly, I usually only do it once per spool. I’ll turn that on and have it do that regularly for a while and see if that makes a difference. I have the bed level one checked for every print.

Bambu support replied and had me wash the PEI plate and print a cube and make a video of it from multiple angles. It doesn’t have the same issue but it was pre sliced. I’m wondering if some how my PC Slicer glitched or somehow saved some settings from a file I downloaded. I always say not to save anything when I exit.

The cube mostly looks good it has a few glitches. I’ll post some of those images.

Thanks.

[Zaphod_Joe]

I started doing Flow Calibration before prints and that seems to of helped a lot. I still have a few particles but not as much and now I’m onto a new black spool so I’ll see how this one goes. Thanks.