Bad 1st layer

[Proton_god]

I am having a real problem with 1st layer, I have localised but not area consistent lifting of filament. I have also noticed the uneven extrusion from the 1st layer. I have
1: Dried the filament, both Bambu lab matte brown and white as well as eSun matte Green for 24 hours. This has seen a large improvement.
2: fully calibrated the printer
3: fully calibrated the filaments
4: used leveling with all prints
5: tried .2 .16 .12 layer lights
6: changed from a 0.4 to a Hardened Steel 0.4
7: slowed the print.
But my 1st layer looks bumpy and v

ery uneven.
What am I missing?

[Olias]

I didn’t see you say that you cleaned the plate. Dish soap and very hot water from your kitchen sink at high pressure from your faucet is all you need. You can’t “see” fingerprints and contaminates on a textured plate, but they are there. Here is an example of what that looks like on a smooth plate.

Layer adhesion issues.

What was under the plate. This is obvious on a smooth plate.

Not at all obvious on a textured plate.

To test your plate, run a first later test. Don’t bother with downloadable models, by the time you downloaded the model, you could have started printing it. Here’s the steps.

1. Right-click in the slicer and select cube primitive.
   

   

2. Scale the cube primitive to the size of your build plate or you can just tale a smaller swatch of 100x100mm and place it in the area you want to measure. The key is to take the z Height and make it 0.28 mm which will give you a one layer print.
   

   

Here’s what that looks like after sliced.

[simon14]

From what I see, it is overextruded

The flow rate calibration sometime can give you wrong impression.
Because most of the time, you only see the result of outer surface. The “imperfection” of the inner layers were hidden from view.

From what I understand you are aiming for this when calibration

But I think it’s better to aim for this instead

[droidxbrad]

I dont know why this happens on the P1S now when it worked so good for so long a period of time before. Im thinking they messed up the firmware, these printers are far less effective than when i bought my first P1S about a year ago. I can most likley tell you how to fix it. Im sure everyone said do a variable flow test and calibrate which you likely already did. Also im sure - clean your bed - was throw out there. But for real - go to your STREGTH tab where you choose your print profile. Then go to TOP/BOTTOM SHELLS. Then go to TOP/BOTTOM/SOLID INFILL/ WALL OVERLAP - and increase that value say to 30. Please post back if it works as solved. Thanks

[Proton_god]

Sorry for the late response, yes i clean the plate with hot water and washing up liquid, i then drip dry and use a cloth to remove any water marks. I don’t use glue stick because the problem is new and I don’t have the time to remove the glue from the print. It seems to be an issue with only matte filament. my PLA basic printed a flowless 1st layer.

[Proton_god]

I will do this now and i agree with you that it is not printing as well as it was a month ago.

[Proton_god]

I will rerun the flow test, it might have changed since drying the filament for 24 hours

[Proton_god]

So I finally solved the issue, it wasnt any of the things i thought it was. Turns out my build plate surface is not working anymore, I tried hairspray and I printed a flowless 1st layer. I have ordered some 3D Lac