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Little bumps on the surface and how I got rid of them

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I noticed that the infill left not only a little ridge where it overlaps with the shell, but also little droplets now and then. First I thought this doesn't matter because it is inside the obect. But then I noticed that on the following layer, these droplets are sometimes dragged to the surface when the shell is plotted, and there they remain as bumps.

I simply reduced the infill overlap (in the experts menu in Cura) from 15% to 8% and the bumps were gone.

Maybe it's helpful to someone.

 

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