Why is my filament marshmallowing to 1.6mm diameter?
This is Amazon Basic PLA that I am feeding manually through my VC3 control panel interface. I am loading 10mm of filament at 1mm/s. It starts coming out of the .6mm nozzle normally, but then the extruder sounds like it skips a couple of times and then the filament starts coming out at 1.6mm in diameter. Not even sure how thats possible, but it does it consistently. This is an E3D Hemera that I recently upgraded from 0.4mm to an 0.6mm nozzle. Does the same thing at 195 deg or 240 deg.
6 Replies
Replaced the PLA with some Matter Hackers Pro Series PETG and it does the same thing.
Better video format
I switched back to .4mm nozzle and it doesnt floof anymore, but still sounds like VC3 is is overdriving my extruder (skipping noises), but maybe thats just the "loading" routine.
national-gold•3y ago
Google di swell or barus effect buddy. Either your temp might be too low, or your extrusion multiplier is wrong. Have you definitely got the correct extruder set in your printer.cfg?
Also is your extrusion multiplier correct
some filaments do this, espeically matte filaments. It doesn't seem to affect printing
# Extruder
#[include config/extruders/bmg.cfg]
#[include config/extruders/lgx.cfg]
#[include config/extruders/lgx-lite.cfg]
#[include config/extruders/orbiter.cfg]
#[include config/extruders/orbiter-1004.cfg] # Use this with the LDO-36STH20-1004AHG motor
[include config/extruders/hemera.cfg]
#[include config/extruders/titan.cfg]
Thats correct for my hardware.
My extrusion multiplier is set to 1. The "default" was set to 0.89 but not sure where it gets that.
I am not sure that the floofing is a problem. I dont think it does this during a print, just when running the filament loading macro. Maybe my Hemera cant keep up with the feed rate (temp could be too low) and the pressure is causing some kind of entrained air to floof the filament as it bursts from the nozzle.
Looking at the Matter Hackers website, I should be using higher temps on this Pro series anyway.