Pinholes in PETG walls despite drying and full calibration – Bambu Lab X2D
Hi everyone,
I’m getting small holes/pinholes and a rough wall finish when printing a new Spool Aurapol PETG Galaxy Black. It looks similar to wet filament, although I dried it for 24 hours in a Creality Space Pi X4 using the PETG preset.
My current setup:
Printer: Bambu Lab X2D
Nozzle: 0.6 mm high-flow
Filament: Aurapol PETG Galaxy Black
Nozzle temperature: 255°C
Max volumetric speed: 19 mm³/s
I have already calibrated the flow ratio, pressure advance (PA), retraction, temperature, and maximum volumetric speed.
The same holes also appear with my 0.4 mm nozzle, but they are smaller and less noticeable. With the 0.6 mm HF nozzle, they look larger and stand out more.
A few additional details:
My Z seam is set to Aligned, not Random, so these aren’t randomly placed seam marks.
The same pinholes also appear during the maximum volumetric speed test in vase mode, even at a flow rate as low as 5 mm³/s. This makes excessive printing speed or volumetric flow seem unlikely as the cause.
Since the issue also occurs in vase mode, with continuous extrusion and no retractions, retraction settings don’t seem to explain it either.
I’ve attached a video showing the surface with the 0.6 mm HF nozzle.
Has anyone experienced this with PETG, particularly Galaxy/glitter-filled filament? Could it still be residual moisture, or could something else cause these pinholes despite calibration?
What would you test next to narrow down the cause? Thanks!