Layers after infill are not flat or smooth
Right after the last layer of infill is finished, the next layers are not lying flat. Surface is very rough, almost like I've purposely scraped it with something. Bottom of the print is perfectly flat and smooth, and I observed no other issues during printing until it gets to that first layer after the infill. I stopped the print after a layer and a half of this, as I could just barely start to hear the nozzle scraping against the uneven surface.
Model is basically a disc about the size of a coaster - just under 95mm across. The print gets to a height of about 5mm when this starts to happen. Oddly enough, the layers in the slicer show this same weird patchwork pattern that's visible in the very first layer after the infill. I'm printing this on an MK4S with the 0.4HF nozzle, using 0.1mm fast detail, "Overture PLA" for the filament (silk PLA to be exact), and 30% gyroid infill. Everything else is basically the stock settings with no other changes.
What am I missing here?
RE: Layers after infill are not flat or smooth
Can you upload the (zip-compressed) 3mf project file so we can see what your settings are? My gut feeling is that that the object is not totally flat on the pint bed in Slicer but it could be other things.
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/
RE: Layers after infill are not flat or smooth
From your description, please locate in:
https://github.com/OrcaSlicer/OrcaSlicer/wiki/flow-rate-calib
the following picture and check whether any of this looks familiar:
"Examine the blocks and determine which one has the smoothest top surface."
Hypothesis: Overextrusion. Makes no difference in infill (as the filament has somewhere to go) but kills flat surfaces. My own go-to value on Core One is 94 % but that only as background info.