Terrible stringing with PETG on neptune 3

I've been printing some honeycomb shelving/organizing units on my Elegoo neptune 3 (bowden) and Anycubic Kobra (direct) using overture black petg (same package opened at the same time) . The kobra has been printing flawlessly, but the neptune hasn't had a clean print yet and most of the stringing and blobs are so bad the parts are unusable.

I've lowered the temp to 225 (brand rage is 230-250, kobra prints at 240), had speeds between 40 and 60mm/s, retraction at up to 8mm at 40-70mm/s, z hop is off, I've switched between prusaslicer and cura, but the results are the same every time. I've run temperature towers, retraction tests, all that.

I've noticed it does not seem to start getting bad until around 30% of the print but once it starts it just gets worse and worse.

Is there a good fix, or is this just an incompatible brand/filament and printer combo?

Balu•12/4/22, 11:05 AM

You can try to swap the spools between the printers. I would guess one of them is wet. Petg soaks up water really fast. You can also try to use more retraction on the bowden setup (depending on your current settings)

sacred-rose•12/4/22, 11:13 AM

Yeah, that looks like wet PETG

BBalu You can try to swap the spools between the printers. I would guess one of them i...

VauschOP•12/4/22, 11:27 AM

I would hope not. These were in a 2 pack and I opened them at the same time. I'll try it in the morning.

Oordinary-sapphire I would hope not. These were in a 2 pack and I opened them at the same time. I'l...

sacred-rose•12/4/22, 12:02 PM

has nothing to say, Water diffundates through the Plastic wrap, even when Vacuum is still inside Water gets through, after about 30 Days of Shelf Time in a normal Weather Condition Warehouse the 8g silica-gel bag inside is saturated, after that the Filament starts to collect water. So with hygroscopic Filaments just assume they are Wet and dry them is the safest way

HHeisenberg@Krähendruck has nothing to say, Water diffundates through the Plastic wrap, even when Vacuum...

VauschOP•12/5/22, 2:28 AM

Is 170f/76c a safe drying temp? My oven doesn't go lower.

VauschOP•12/5/22, 2:51 AM

Nvm found a workaround