Problem:
The vertical wall, south-internal side of the model, has poor quality - ragged, jagged. Only this south-internal face (closed to the printer doors but not visible directly) has the issue, the rest of the walls are good, which is strange for me. I cannot figure out what might be wrong - hardware problem? cooling? settings?
The wall has 4 lines altogether: 2 internal and 2 outside, and only this south-inner one is jagged.
I do not think it is a fan problem, as the first ~1 cm of the affected wall is relatively good, with a sharp transition to the jagged area.
I have also noticed strange, regular lines on the east internal wall; not sure if they are connected.
Jagged south-internal face:
Opposite side with good quality:
Strange lines on the east-internal face:
3 printed attempts look the same, so this is not a random issue.
Do you have any ideas how to improve this print?
Model:
Vertical walls of a box, about 40mm high and 160x120 mm long, 2mm wall thickness
Printer: P1S, 0.4 hardened, with about a year-long history of printing.
Slicer: Bambulab
Filament: PLA Basic black
Print profile: 0.2 layer Bambulab standard with the following modifications:
- Wall loops: 3
- Precise wall: on
- Precise Z high: on
- Wall generator: Arachne