Beginner Problem

Hello, I received my Christmas present two days ago, a K2 PRO Combo.
The setup was very quick, and I immediately printed my first Benchy with the white PLA spool included in the package.
Without changing any settings, the result is great.

Then I wanted to print this container ( 3D Printer Files | 3MF File | K2 (Pro) Waste container / poop bucket (removable) | Creality Cloud ), and disaster struck, see photo1.

I then tried to print a small U-shaped object, and there are also defects. (2nd photo)

What settings should I adjust to fix these problems?

Thanks in advance

Hello @Plub :wave:
Welcome to the Creality Forum…! Creality-Logo

Congratulations on getting a new K2 Combo…

It’s hard to tell what the defects are and what settings you used…
Give us a little more detail so someone can help you adjust your settings…
What slicer..?
Temperatures…?

In the mean time go over the new machine and make sure everything is tightened up and there are no loose parts.

Get to know all the functions in the menus and how the slicer works.

Print some smaller test pieces to see how the first layer is going down.

I haven’t changed any settings, but I’ll restart my printer and give you all the information.

Thank you for taking the time to reply.

Hi Plub, I have the same machine and I’m loving it. Did you use the CFS system to do this print? Or the side spool? Did you let the machine read the RFID label? If so, you should print these parts with 100% infill and 3 to 4 walls. Looks like you have printed it with only 2 walls. Apart from the warping, this part looks OK.

Hi,

Yes, I printed using the CFS and let the printer read the RFID.
I’ll try it again tomorrow with your suggestions.

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Hi,

I’m getting back to you after performing various calibrations (Temperature, Flow rate pass 1 and 2, and Pressure advance). Here are the results I obtained.

Filament Creality Fast PLA

I restarted to print the container, and this time there were no problem, but there are a few defects.

Do you have any suggestions for improving this print?

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Hi Plub, I’m glad you were successful in printing the part. The issues you encounter might be humidity and possibly temperature too high inside the chamber. Even PLA prints better if it’s printed very dry, it is hygroscopic, but not so much as other filaments, drying it prevents some of the stringing, I allways dry it around 4 hours. If you are printing with the top lid closed, you should try taking it off during PLA printing. I’ve been using Creality RFID Hyper Filament, and RFID gives all the perfect printing parameters to the printer, and it has been printing flawlessly. Have you ever performed a flow calibration? I do force leveling calibration on every print I do, and from time to time I do a full calibration including flow calibration and Input Shaping. Your parts are still a little bent it must be temperature related, did you use a brim around the base also? Cheers.

PLA is hygroscopic meaning it does absorb moisture from the air which is why we need to dry it when it is exposed to a humid environment.

Sorry, I meant it is hygroscopic, bot not so much as some other filaments like TPU or Nylon. I do dry PLA anyway to make sure I do get perfect prints. Cheers

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Okay, I have been told that it mostly absorbs the moisture through the cut end and not the sides of the PLA filament. Before starting, I usually cut off 6”-8”, and make sure it isn’t brittle after that, and I have never had problems with PLA after that.

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In my experience with PLA which is Hygroscopic meaning it absorbs moisture throughout the roll. I found that if the end is brittle and snaps off it needs drying. I’m sure you could research that and find out more reliable information so I wouldn’t take a chance on something you heard…
There are many references online how to dry PLA properly but here is one:

REF: PLA Handling and Drying