Thanks, but it is not possible to print. Perhaps some can testing my files.
This is my part for printig, but looks bad in Cura:
http://www.ortenow.de/upload/Cover.stl
Zylinder.stl is for testing. Simple zylinder with 0.4mm wall. With nozle size 0.39 mm, shell thickness 0,39 and "Spiralize the outer contour" (in Expert config) it seems to work.
http://www.ortenow.de/upload/zylinder.stl