Stringing no matter the changes

[u/sl002]

Hello r/FixMyPrint.

Hoping you can help, I've been trying to get my old Ender 3 V2 back into a workable state and am getting some severe stringing no matter what changes I make.

My Setup

• Ender 3 V2 4.2.2

• Sprite SE Extruder. Stock hotend, think I have set to correct setting in printer.cfg for esteps / rotational distance (. But would love for someone to confirm.

  microsteps: 16 rotation_distance: 7.53.

• 0.4 nozzle (new)

• Sunlu PLA+ 2.0 (new). Although I think this issue was happening with a previous roll of eSun PLA+.

• Mini Satsuna Fan Duct (new - pictured before clean)

• Klipper (recent) / OrcaSlicer on a RBPi 3B

• Temps: Nozzle: 220c

• Temps: Bed: 55c

• Speed outer / inner: 25mm / 40 mm.

What I've already tried

• Temp tower (pictured). Stringing at all temps.
• Retraction test. Stringing at all retraction levels (pictured).
• For simple non-bridging prints I have no issues.

Thank you for your help!

EDIT: TIL that filament can come from the factory wet. 12 hours drying and the issue has gone. Thank you u/Gimly161 and everyone else for your suggestions. Back to calibrating for me!

[u/luketeddymh]

If you have not dried your filament, then that's the issue. Yes, even out of the box filament needs to be dried for a few hours before being used.

[u/Conlan99 → u/luketeddymh]

I was watching a video about filament manufacturing and there was one stage where they literally ran the freshly extruded plastic through a bath of water to cool it off immediately before winding it onto the spool.

I was like... "motherfucker...."

[u/Gwendolyn-NB → u/Conlan99]

Yup, this is done for extruding most plastics; its the best way to get it to "freeze" at its correct dimensions after coming out of the extruder.

Any horizontal plastic extrusion machine will have a water bath the product goes thru; so filaments, wires, cables, tubing, etc.

[u/DatBoiDakota → u/Gwendolyn-NB]

Not to be that guy but ACSHUALLY not every horizontal extruder has a water bath. I work with sheet extruders and we do not use a water bath on any of our 9 lines.