First layer "tidal" waves
I'm having occasional problems with my first layer, particularly with the Azure Blue PLA from Prusament:
The transparent parts are correct (measured with a micrometer), but the darker spots are FAR too thick. In this case, I printed without issue a few pieces (both different from this and prototypes for this). I changed nothing, let it cool down before printing, and it has continued to print this way. I redid first layer calibration in case that was off, and it didn't help - I had it happen during a calibration.
Prusa Mini+, first layer settings are PrusaSlic3r default, changing to a different filament usually fixes it. First layer calibration is confirmed with a micrometer. Only non-aesthetic change is a bondtech heat sink.
My best guess was the extruder was too tight, compressing the filament and causing inconsistant extrusion, but when it stopped working (after it had worked fine for a couple prints) I loosened it about a full turn and it didn't fix it. I can't imagine that it would have printed fine the print before then does this based on overextrusion if loosening a full turn didn't solve it.
Has anyone else had this issue? I can't seem to find it anywhere (if I search for first layer waves, its usually tiny waves due to slightly-too-close first layer). Any ideas what it could be?
RE: First layer "tidal" waves
After unloading the Azure Blue, loading Gravity Grey, cooling (until the fan turns off), and printing again:
Not perfectly smooth, but the problem isn't there.