• Printer make and model: Neptune 4 Max
• Any Mods: All rails, dual sync belt, forward braces, btt eddy duo, internal USB hub wiring
• Firmware: OpenNept4une
• Filament material and temps: Rapid PETG @ 250C
• Slicer: Orcaslicer Beta
• Any recent changes: Refined pathway for filament, various extensive slicer profile tweaks
• What have you tried so far: Flow rate, pressure advance, input shaping, the usual suspects. This was prior to the refinement, after which I immediately levelled and printed to see if that fixed this problem
#Misprints, Globules, and Waves. Oh My!
silver socket
vestal dust
Looks like you need to retune everything, and make sure you are using a speed that the filament can actually handle.
silver socket
These are my speed settings, provided by the calibration test. I daresay they are slow enough.
Nevertheless, I will retune anyway.
I do not have much faith that it will have an effect on this, however.
vestal dust
PETG usually requires MUCH slower print speeds and flow rates than most other filaments. The high speed PETGs are better, but still need to be carefully tuned for max volumetric flow rate to prevent under-extrusion.
It's entirely possible that your speeds and flow rate are much too high for the filament to reliably handle with many sudden changes.
In your case, I would probably start with the Max flowrate test, and when you see the point where the extruder starts skipping (gaps in the wall), then reduce that flow rate number by 30% and that's what to use in the profile.