It looks like you have massive problems with your extrusion, so normally I would say, check your nozzle, feeder gears and so on. But you said you have checked it and its ok.
Then the material itself could have problems, bad quality for example.
But it is strange that you say, if you print an old gcode file, it is ok. So you just print an old gcode file with the same material and nozzle, I would say it has nothing to do with your hardware.
What about the other settings, material diameter setting is correct?
2 hours ago, Andy6583 said:this is something I printed from "old" gcode after the problem occured
Shows also some extrusion problems, but not so much.
Do you print with the same speed? Try to print slow, about 30mm/sec and check the result again if it is better.
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P.s. this is something I printed from "old" gcode after the problem occured
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