slicer: cura (please take cura, Don't take slic3r!)
Nozzle: 0.4mm
support: only for cover
Optimize Wall Printing Order: Yes
Fill Gabs Between Wall...s: No
Use adaptive layers: Yes
Layer: 0.10 to 0.20mm with adaptiv layer
material: PLA
Infill Travel Optimization: Yes
Print Thin Walls: Yes (important for stator.stl)
Not to fast! Print the parts with about 30mm/s, to get a good layer connection. (It depends on the quality of your printer)
not to hot, because of dropping nozzle PLA 205*C
infill: maximal15%
walls before innfill: YES
Ouline walls before inlines: YES