K2 PRO Print Quality problems

Hello guys,

Recently I’ve been experiencing really bad print quality on my K2 Pro + CFS at the top layer.

It’s like its over-extruding or too much flow at some points, but on others its just not enought.

I’ve done the “calibration” two times and its always the same, printed same model two times and similar errors.

It has a total of 450h print time, and I’ve cleaned the nozzle with cold pull but still the same. Never used abrasive filaments, only PLA/PLA+/PETG.

What do you think it could be?

Thanks guys!

こんにちは。
1回225hオーバーワークの様な気がします。
熱・稼働時の振動などで色々狂いが出るのではないかと思います。

サイズが分かりませんが、小さなサイズで1時間程度のプリントでも起きるかtestされてみたらいかがでしょうか?