3d print artifacts - help

[EpicSkittles]

Overall im pretty happy with the snapmaker 2.0 A250 but i keep getting artifacts and errors in my prints (see pic). im not sure how to stop this, i have tried a lot of different settings in snapmaker luban software and in ultimaker cura 4.7 but have not been able to stop this. any help would be appreciated.

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[xchrisd]

Hey, you are underextruded and your Linear advance is way off, unfortunately every machine.
Do some Googleing or have a look at this post, I guess it is complete:

Extruder Calibration a must

i think this has been covered already but worth a remention as my A350 shipped with the extruder E value of 212.21 and it needs to be 249.65 This is quite a 15% inaccuracy and results in significant under extrustion. Quite suprising the Snapmaker team didnt catch this in QA testing. Hopefully they will ship future units with an updated E value to save novices a lot of hassle. Infact id just say change it to my value by connecting via the Serial USB (not WiFi as you wont get the data) Maximise…

[EpicSkittles]

Thanks xchrisd, just checked the E value of the extruder and it was out by a bit and my flow rate in my slicer was on 95% which i didnt notice. im new to 3d printing and didnt see the extended or advanced settings in cura and had no idea about extruder E values. i will try the print again and see how it goes.