Strange lattice/stringing issue – does anyone know this failure pattern?
Hi everyone,
I’m running into a very strange print failure and I’m hoping someone here recognizes the pattern or knows the root cause.
I’m printing a lattice-style model and the outer perimeters seem mostly okay, but inside the structure I get massive random stringing/cross-connections between cells. It almost looks like the nozzle is “drawing” across open areas instead of following the intended paths.
The issue appears consistently on multiple parts in the same print job.
Printer/setup:
Printer: Core One+
Material: PETG
Nozzle: Prusa CORE One HF0.4mm
Layer height: 0.25mm balanced
Slicer: PrusaSlice 2.9.4
Firmware: 6.4.0 (downgrade from 6.5.3 because of failed filament sensor calibration)
Temps: 220°C for other layers (if I use higher temperature stringing occurs)
Filament: Geeetech 220 – 250 °C
What I already checked:
Filament is dry (or at least should be)
Bed adhesion is fine (used clue)
Belts are okay
No obvious clog
What confuses me:
The defect occurred after about 24 hours of printing
Has anyone seen a failure pattern like this before?Any ideas what could cause it?
Thanks in advance!
RE: Strange lattice/stringing issue – does anyone know this failure pattern?
You can turn on show travel in the prusaslicer preview to see what's happening. One thing you can try is turn on "avoid crossing perimeters" in print settings.
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/
RE: Strange lattice/stringing issue – does anyone know this failure pattern?
if I might add.
You have that you have it at 220c for PETG, and that the filament is dry.
How do you know its dry? did you try drying it already? is it pretending to be the Snap Crackle and Pop spokes elves and making those sounds when it prints?
Did you try tuning / dialing in the filament a bit?
Are you getting the same result with other prints?
Check the model for any errors? (would have a little alert triangle next to the file name on the right side (if using prusa slicer)
Shane (AKA FromPrusa)