Hi!
I have a rather surprising (at least to me) problem with the top surface layer on my Bambu Lab P2S.
The print settings are standard except for:
-
top surface speed: 50 mm/s (instead of 150 mm/s),
-
quality → top surface line width: 0.32 mm (instead of 0.42 mm),
-
top surface pattern: Monotonic Line (instead of Monotonic).
With these settings, prints made with Bambu Lab PLA Matte (important!) in black come out like in photo 2 (perfectly smooth).
However, prints made with Bambu Lab PLA Basic or Devil Design Silk, using the exact same settings, come out like in photo 1 — the part marked in red (wavy filament, but only on the top layer).
But I noticed that if I redirect the incoming air downward (so the air does not blow directly onto the filament cooling fan), the waves suddenly disappear (the part marked in blue).
How should I deal with this problem?
Should I lower the nozzle temperature? (I tried, but even though I save the change, the app still shows printing at 220°C — I changed it to 205°C.) Or should I reduce cooling?
P.S. For some reason, with the exact same settings, some prints occasionally come out like in photo 3 (using the same Bambu Basic / Devil Design filament). But those successful prints seem pretty random.
