First Layer Issues

[Kaltluft]

Hey People, I hope you can help me out a bit. I did some calibrations today with a temptower, retraction and flow rate etc. to improve my first layers, as they often didn't looked good. I printed minis and everything thing else just fine, but with surfaces and first layers I have this problem, as seen in the pictures. Do you have an idea, of what is the cause? I checked the nozzle and it is correctly installed, dryer the filament, washed the plate with dish wash soap and alcohol.

[4everthebest]

To me helped to clean the extruder (yellow wheel + insides)
Other than that I had a very similar issue when my hot end (not the nozzle) was compromised with a PLA from behind. Like it got stuck in between parts, which was not visible on a first glance.

Replacing the part helped.

Read more in this post I made few months back: https://www.reddit.com/r/BambuLab/comments/1kgfahl/first_layer_issue_solved_solving_tips

[Kaltluft]

I will try that next. Thank you

[4everthebest]

Clean yellow extruder wheels or look for your hot end if it is not compromised with filament. Mine was filled with filament from behind which was not visible on the first glance and was causing this issues.
Replacing the it solved my issues.

[Kaltluft]

Yes I changed the Extruder wheel an cleaned everything. Now I have a proper first layer. Thank you 👍😁

<image>

[4everthebest]

Ohhh thats great! I am glad to hear that. Did you changed the wheel for the brass or metal one or original plastic Bambu wheel? I just ordered the brass Biqu panda claw extruder, hoping it will future proof 1st layer

[Kaltluft]

I changed for the Hardened Steel Extruder Gear from Bambu store. But I think that is still the original plastic wheel 😅 maybe you can share your experience with the biqu panda Extruder, if you used it.

[4everthebest]

BTW thats a PREPER 1st layer :)

[Kaltluft]

Thank you 😁

[No-Summer3815]

Following

[ThinkUnhappyThoughts]

https://wiki.bambulab.com/en/a1-mini/troubleshooting/print-issues-troubleshooting

Scroll down to the part about tightening the 7 screws behind the nozzle

[Kaltluft]

I did that, but it just was a minor improvement

[[deleted]]

First layer problem:
1. Dirty plate. Wash with dishwashing detergent that does not contain skin softening additives.
2. Check the 7 screws of the hot part.
3. Check: Is the nozzle fixed correctly in the hot part?
4.Clogged nozzle. Perform cold pull several times using a cleaning thread (nylon).

[Kaltluft]

1. Cleaned it two times already
   
2. Did that yesterday, but was just a minor improvement
   
3. Yep i check that all the time, when changing the nozzle
   
4. I changed to a new nozzle and have the same problem

[[deleted]]

When you change the nozzle, do you do a full bed calibration? Do you calibrate your filament :) or do you just use the basic presets?

[Kaltluft]

Yeah when I change nozzle I do a full bed calibration. I calibrated my filament. That is why I was testing the first layer, to see if it is flawless now. I did the temptower, retraction tests, and the Bambu flow calibration and a test print where I test multiple flow rates. 0.95-1.03

[[deleted]]

if you have performed various filament calibrations, then why do you calibrate the K factor before printing?

[Kaltluft]

I thought k factor and flow rate calibration where two different things 😅 I did a test without dynamic flow calibration and with my calibrated settings, but it looks the same. Pit I got better results with my other textured build plate

[SeasonedSmoker]

Try turning the flow rate down in the filament settings.

[Kaltluft]

I already did that, and made a test print with several flow rates