I’ve been printing on this P1P with PETG for a week now. It was working perfectly, now all of a sudden the prints have turned terrible. Not only is there this overall ugliness, but it looks like an extrusion problem as sometimes the prints have large gaps.
I figured this was a symptom of a clogged nozzle, so I replaced the nozzle, but it’s behaving the same.
Any ideas?
Hi!
Could it be too much moisture in your PETG ?
Thanks for the reply, it’s a brand new roll.
Are you saying you switched to a brand new roll of filament and that’s when the issue started? If you’ve changed nothing else, then I’d try drying that roll of filament. While likely not a common problem, some have found even brand new rolls of filament needed to be dried before using.
No, I was printing fine, then parts started coming out like this. I replaced the nozzle, no change. I put in a new roll of filament, same problem. (same filament brand and type before and after the nozzle swap)
Do you have another printer where you can test it? Which is the filament brand? Is it a normal PETG or it is charged with other material? (such as carbon fiber, copper or similar)?
3D printers are usually very consistent once you have the settings dialed in for a particular part. It looks like something changed related to the filament feeding.
How does the temperature of the hotend look while the part is being printed? Anything unusual there like temperature fluctuations during the print?
Got a picture showing a large gap?
Nothing has changed unfortunately. Print temps look ok.
I tossed the really bad one thinking it was a fluke - I found it detached. It was almost like a mesh
Do you have a photo of that same part when it was printing as expected?
When you say, print temps are okay. Is that “okay” on the screen ?
Have you tried printing a temp tower, with the filament’s temperature span of your filament, after you changed the nozzle ?
As you changed the nozzle, was it a complete assembly, or did you transfer the wiring to a the new nozzle ?
I had a simular issue with PETG, I switched to a new nozzle with not much of a change…then I did a few cold pulls with nylon to both nozzls and everything was fine afterards…if you dont have any nylon filament, weed eater line will also work. IDK if it was a fluke with machine, something in the new filament, or my old and new nozzles were clogged…I just know everything was fine after.
The temps are reported correctly on the screen. I did not try lowering the temps.
I changed out the entire assumbly with the little heatsink and fan.
You had to do a cold pull on a brand new nozzle? That should never be required since a new nozzle couldn’t be clogged with filament.
I think there was something in the filament, I didnt notice anything in the nylon after the cold pull, but there could have been…or there was a bug with my machine and the stars alined when I decided to do a few cold pulls on each nozzle. IDK everything has been great since…
So this is super weird… I ran a calibration and did a print and it worked perfect. So today I tried to print again, and it exploded again. It’s not detaching from the PEI plate, it’s just failing.
Is your p1p fully enclosed?
It is not. Those two prints were taken one after another, a couple hours apart without slicer changes.
Have you pulled the extruder apart, cleaned it, made sure the spring tension is tight and everything looks good inside? Sometimes the teeth can get clogged with plastic and cause the filament to slip from a clogged nozzle, maybe you’r previous nozzle was clogged. IDK just trying to save you time with a support ticket with Bambu.
I deleted my previous comment because I did not read everything prior.
Try a vase mode print and see if you still have bad results
