yellowshark 153
Hi Ian, it is always best to give us your major settings otherwise we have to make assumptions and it probably takes longer. As Skinny says for your top layer problem you need greater bottom/top thickness. I will assume you are using .300 layer height and 20% infill. You may get away with a bottom/top thickness of 0.9mm but maybe not. If your layer height is 0.200 or les you probably want at least 1.2mm as your bottom/top thickness setting.
Bottom layer - I would reduce your bed to nozzle distance by 0.04mm. Is it better or worse?. If worse go the other way, so increase the distance by 0.08mm; so instead of being -0.04mm you are now +0.04mm. If still worse give up and take up remote controlled drone flying. Assuming one of them is better but you feel it could still be improved, then go in/out another 0.04mm and see. If that is worse then come back 0.02mm. etc etc
I am assuming you are running the first layer at 20 mmm/s, layer height of .300, extruder temp of say 210. If the answer to that is no then you might be under-extruding - but need to see your settings.
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skinny-kid 65
What settings are you printing at? Looks like your bottom/top layer thickness needs to be adjusted to .8 or greater. I experienced similar issues until I increased that setting to 1
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