Little ugly gap issues with Petg matt

Rosch · March 8, 2025, 4:17pm

Hello,
I am printing with Sunlu PETG on a P1S and have now tested a lot:

Significantly reduced speed

Dried the filament thoroughly

Calibrated flow and PA (Pressure Advance).

The result is quite good, but I cannot get rid of these lines. They always appear after overhangs or at the end of holes. Sometimes they look like a hole, sometimes like a bulge.

Slowing down after overhangs is enabled.

Can anyone give me a tip on how to get rid of this?

Thank you!

BambuBanker · March 8, 2025, 4:22pm

If this is showing up with other filaments to then retensioning your belts is probably the solution.

Rosch · March 8, 2025, 8:51pm

I did a retensioning --without any improvement

BambuBanker · March 8, 2025, 9:09pm

How did you dry it?

Rosch · March 8, 2025, 10:55pm

I dryed 18h in a sunlu dryer at 55°.
humididy is 22-25%

inlanoche · March 9, 2025, 5:20pm

I read that PETG should be dried at 65 degrees. Just thought I would put that out there.