Hi, this is the first time my P1S is giving this kind of problem. The model is symmetrical: one side is good, the other not. Suggestion?
Simple printing without supports, 0.4mm nozzle, 0.16mm layer height.
Mattia from Valeria Momo & Mattia, Thanks
EDIT: i use Bambu PLA MATTE WHITE
the situation is getting worse
You didn’t mention what kind of filament you’re using but I can already see two problems. The first is that the filament profile is not properly tuned. Search here for filament tuning and you will find loads of tutorials. The second possibility is that your filament has moisture which may benefit from drying.
It would be much more helpful if you printed a known model that we can compare to such as a Benchy or a calibration cube. From the community here can give you higher quality advice as we will be able to work from a known model.
Thank you for your response.
I am printing in Bambulab Pla Matte White.
I printed a calibration cube (see photo).
I have already calibrated the flow.
Up until 2 days ago the printer had no problems, then something changed.
Thank you for providing the additional photo. This is very helpful as it highlights some of the issues.
If you search the term “Matte Filament” here, you will find many reports of quality issues with Bambu Matte and Silk filaments. These problems are well documented.
Part of the issue is the quality of the filament’s production and the formula they use. There are many other matte filaments that perform better, but none are perfect.
The second issue is that the factory filament profiles are not well-tuned, so you will need to tune the filament profile yourself. The best tool for this is to download Orca Slicer and use the built-in calibration utilities. Based on the example your cube provided, I would focus on Flow Rate and Max Flow Rate calibration, with the Temp Tower calibration being the last step.
However, before doing this, even though Bambu says it’s optional, my experience has shown that their Matte and Silk filaments do require drying. Here’s an example of an extreme example out-of-the-box print (a standard cylinder primitive) before and after drying. This was Bambu Gold Silk filament.
For a good tutorial on how to use the Orca Slicer calibration utilities. Here is a 9 minute version that does a good job of walking you through the calibration and tuning process. https://www.youtube.com/watch?v=02mLDrxEpwQ
Here is his more advanced video that you want to watch after the first one. This covers his end to end process. https://www.youtube.com/watch?v=5CVq6DycUOE
Good luck and let us know how you do. 
