I had to use a different brand of PETG and this happened. I have printed this part flawlessly before. Any ideas to what could be wrong?
With no information other than this picture I would guess moisture.
1 Like
Itâs not much info you are giving.
To me, it looks like your cat had a fun time. You should pay the cat more attention. 
I would agree partially with the above comment about wet filament.
It looks like a partial clog that left little pieces of filament extremely under extruded all over your print.
When asking for help make sure you include all of the relevant info, filament brand, type, temperatures youâre running at, enclosed/not enclosed. Printing from AMS or back spool.
Fidelity in data will help get you to a resolution quicker.
No cat, that I know of 
It was a brand new Overture spool, directly from a sealed bag, so it shouldnât be wet or moist.
1 Like
Filament from a vacuum bag cannot be expected to be dry when the production process runs the filament through a water bathâŚ
I have received PETG filament, recorded a weight put it in the dryer, when I took it out of the dryer 8 hours later is was 5 grams lighterâŚ
Also is this PETG-CF?
1 Like
Ok. Didnât know that it might not be dry straight out of the bag. It is not CF and shouldnât be matte. I will try to dry it.
The type is Overture PETG and is run through the AMS. The temperature is 250 and 70 bed. Also tried 85 bed temperature as per filament manufacturer recommendation (80-90 range). Filament should not be matte, but looks like it. The extruded filament looks âdryâ maybe too hot?
Go to 1:58
After filament is extruded itâs cooled down in a water bath basicallyâŚ
Normally a shinier finish meant a too hot if I remember. Correctly. Whatâs the max temp spec for the filament? Did you do a temp tower for it?
2 Likes
I think X1 can be used as dryer. Check the menues, they have updated it with timer.
EDIT: The Carbon version
1 Like
Print speeds matter a lot more with PETG. Iâd make sure you are using a PETG profile in Studio. I would up the temp on the PETG from the 250, as our Generic profile has it at 255c.You might even try 260c or even as high as 270c. Hardened steel nozzles need higher temp to keep the filament flowing than brass nozzles. Also what is your chamber temp? You mentioned bed, nozzle but not chamber temps when this happened. It is recommended that you have the top removed or the door open when printing PETG. You can find lots of these suggestions on this wiki page. Filament & plate compatibility and parameter settings | Bambu Lab Wiki
1 Like
The matte appearance and the crumbles strongly suggest the heater stopped working mid-print, or for some other reason, it got cold, and your extruder turned into a grinder. Could be a heater issue or a temp sensor issue.
You have a filament tower in the back. Are you using multiple filaments with this print? It looks like clog and consecutive extrema under extrusion.
I had some issues with crossing infill patterns and PETG. Try turning off the âreduce infill retractionsâ for any crossing patterns like grid, and/or try a pattern like honeycomb instead.
Any updates?
Do you have a filament dryer?
If not, you can definitely use the bed as a filament dryer as long as you have a metal or glass bowl to sit over top of the spool. The only thing that youâre going to have to worry about is the bed heater turning off on time out unless you have an X1C.
1 Like
The latest firmware release is what causes this, I have had nothing but problems since updating.
2 Likes
Iâve heard similar on here and several discord servers. Has anyone seen anything about rolling back the firmware?
Did anyone find a resolution here or have any updates on their progress? Iâve had my X1C for a few weeks now and Iâve had to change two nozzles due to this issue, also when using PETG-CF. Iâll get several prints just fine, and then suddenly get a print like the one shown above and then everything starts to print like â â â â until I change the nozzle. Iâve gone through the unclog steps in the wiki but none of those processes seem to help.
Hi @wwwryan ! Welcome to the Forum1
Just a tip - itâs best to ask this sort of thing as a new separate question of your own, especially if a post is months old. Youâll get much more traction and many more eyeballs on it!
Just as a quick answer, are you using a .6mm nozzle or larger? If not thatâs at least part of the problem.
Any âfilledâ filament - Wood, CF, some Marble types, etc have solid particles imbedded in the plastic and require a larger nozzle to prevent clogging.
But seriously - make a separate post, many of the most knowledgeable people have their settings set to ignore old posts.
Cheers!