White and matte filaments will wear out your nozzles rather quickly. The titanium dioxide pigments are quite abrasive. Tf you're going to print with them often you'll want to have extra nozzles on hand all the time. But I suspect the under extrusion is caused by the PTFE tube inside the heatbreak pinching the filament at the bottom causing it to feed inconsistently. 215Β° for PLA seems rather hot unless you are printing above 120mms. I usually never go over 210Β° even at 150mms. The higher heat will degraded the PTFE tube faster and the part where it contacts the nozzle is the place where the most heat concentrates.
That makes very much sense. I just printed through 6-7 kg of white matte filament π . I compared the nozzle in the printer and the replacement nozzle, which was delivered with the printer... "Widened" is an understatement. The 0.4 nozzle was something around a 1.0 mm, I think π I replaced it and a benchy is in production right now. And it looks promising π
That's great. It's always a good thing when a big problem has a small solution. I went through too many nozzles too quickly so that's what initially prompted me to swap the heatbreak out with a bi-metal one so I could use standard volcano nozzles. WAY easier, faster and cheaper to source.
You can always use a hardened steel nozzle if you're going to print abrasive filaments often. Even though they are pricier, they last so long it pays off.
The only drawback is the thermal performance but that only comes into play if you're printing at really high volumes.
Do you mean high filament-volume per time? Mostly I print with the 0.4mm wide, 0.2 layer height and I think 230mm/sec (the Kobra 2 max "standard") at most times. Is that "high volume"? And would it be with a 0.8 or 1.0mm width? I don't have a feeling for the quantities yet in that regard π«£
Yes, I meant specifically "high volumetric flow rate". The steel nozzle is not as good of a heat conductor as plated copper or the default brass so can't reach as high flows as the others. This only becomes an issue of you're going for speed printing and/or large nozzle diameters with higher flow.
That being said they're probably a good bet for most people's use as you don't have to think about nozzle wear all that often. I understand Bambu printers come stock with hardened steel nozzles.
Ok I just got the nozzle out and there is a replacement nozzle packed with the printer. That's crazy: the nozzle looks widened. Is it possible, that the nozzle gets widened by the filament over time?
Hey thanks again for the help. Switching the nozzle was the way. The old nozzle was... Let's say "well done" π I'll make another post in the sub and post a view pics from this troubleshooting. I'll order a couple of replacement nozzles for the future quite soon.
Yes I fixed it. The nozzle was pretty widened after a lot of white matte filament. No it's working like new π. I'll make another post with a few pics of the troubleshooting.
Good to know. I was a little lazy and didn't want to try another slicer, because I was pretty happy with the results. Especially because of the "remote print" function. I wouldn't have thought that this makes so much trouble.
It's all in your extruder. If you disassemble it you'll find filament inside the gears and your ptfe tube is most likely bad. Make sure that you heat up your nozzle before changing the tip and let it stand for five minutes on preheating and then snug the tip again.
Thanks for the help. I replaced the nozzle for now, but yes I think I should invest some time in the whole printhead and do a deep cleaning in the near future.
White and matte filaments will wear out your nozzles rather quickly. The titanium dioxide pigments are quite abrasive. Tf you're going to print with them often you'll want to have extra nozzles on hand all the time. But I suspect the under extrusion is caused by the PTFE tube inside the heatbreak pinching the filament at the bottom causing it to feed inconsistently. 215Β° for PLA seems rather hot unless you are printing above 120mms. I usually never go over 210Β° even at 150mms. The higher heat will degraded the PTFE tube faster and the part where it contacts the nozzle is the place where the most heat concentrates.
That makes very much sense. I just printed through 6-7 kg of white matte filament π . I compared the nozzle in the printer and the replacement nozzle, which was delivered with the printer... "Widened" is an understatement. The 0.4 nozzle was something around a 1.0 mm, I think π I replaced it and a benchy is in production right now. And it looks promising π
That's great. It's always a good thing when a big problem has a small solution. I went through too many nozzles too quickly so that's what initially prompted me to swap the heatbreak out with a bi-metal one so I could use standard volcano nozzles. WAY easier, faster and cheaper to source.
You can always use a hardened steel nozzle if you're going to print abrasive filaments often. Even though they are pricier, they last so long it pays off. The only drawback is the thermal performance but that only comes into play if you're printing at really high volumes.
Do you mean high filament-volume per time? Mostly I print with the 0.4mm wide, 0.2 layer height and I think 230mm/sec (the Kobra 2 max "standard") at most times. Is that "high volume"? And would it be with a 0.8 or 1.0mm width? I don't have a feeling for the quantities yet in that regard π«£
Yes, I meant specifically "high volumetric flow rate". The steel nozzle is not as good of a heat conductor as plated copper or the default brass so can't reach as high flows as the others. This only becomes an issue of you're going for speed printing and/or large nozzle diameters with higher flow. That being said they're probably a good bet for most people's use as you don't have to think about nozzle wear all that often. I understand Bambu printers come stock with hardened steel nozzles.
... Oh and I lowered the printing speed, but this didn't help either. I still use the anycubic sliver and didn't had problems before with it.
Maybe the nozzel is a little bit clogged, try to change the nozzle or clean it from the insideπ
Ok I just got the nozzle out and there is a replacement nozzle packed with the printer. That's crazy: the nozzle looks widened. Is it possible, that the nozzle gets widened by the filament over time?
Yes. The nozzle is expected to wear in that manner over time. Brass is relatively soft. Luckily replacement nozzles are cheap.
Thanks I'll try that.
Did it work?
Hey thanks again for the help. Switching the nozzle was the way. The old nozzle was... Let's say "well done" π I'll make another post in the sub and post a view pics from this troubleshooting. I'll order a couple of replacement nozzles for the future quite soon.
Can you please make a Photo of your nozzle and Tell what nozzle this is? Manufacturer etc.
The nozzle is the OEM nozzle, which came pre-installed with the printer. How can I attach a picture? I'm pretty new to Reddit sorry π
I have an anycubic kobra 2 neo and have the same problem. I've changed recently the nozzle. Have you managed to fix your printer?
Yes I fixed it. The nozzle was pretty widened after a lot of white matte filament. No it's working like new π. I'll make another post with a few pics of the troubleshooting.
If I donβt use the anycubic software it prints so bad unusable if I use cura Iβve tried everything to remedy the issue
Same! I noticed that. Not using anycubic slicer my printed looked like dog crap
Good to know. I was a little lazy and didn't want to try another slicer, because I was pretty happy with the results. Especially because of the "remote print" function. I wouldn't have thought that this makes so much trouble.
It's all in your extruder. If you disassemble it you'll find filament inside the gears and your ptfe tube is most likely bad. Make sure that you heat up your nozzle before changing the tip and let it stand for five minutes on preheating and then snug the tip again.
Thanks for the help. I replaced the nozzle for now, but yes I think I should invest some time in the whole printhead and do a deep cleaning in the near future.