Print fails at 9mm, stringy

My print keeps failing at around 9mm height.

X1-Carbon, 4 days old.
Using AMS, Gray PLA. I have done larger and taller prints with this PLA already.

Firmware is up to date, Unit is calibrated. I always run bed leveling and extrusion calibration.

What could be changing during my build that would cause it to go from good to this mess?

Thank you,
Glenn


Looks like a clog, are you printing with the top or door open?

No, both the door and top are closed.

If you’ve updated the firmware since you received it, reset the printer to factory settings.
SettingsGeneralRestore Factory Settings

If it still fails, try printing using Bambu’s recommendation to print PLA with door and top open.

A bit more information to get better support would be helpful.
You mentioned that you printed with this PLA before - on the X1C or another printer?
Which profiles for the filament you are using? What PLA (Brand)? Stock settings or modified profiles?
I recognize that Bambu invests a good amount of resources to make the UE as flawless as possible, but there are still settings that seems better deviating from stock. In my opinion it looks a bit of a combination of temperature / cooling and speed which shows effect only after some time of printing - as during heat up etc there is still a good amount of flow available.

As soon as more information is available, we can help better.

Thank you to everyone for the feedback and suggestions.

I have restored the factory settings and I am trying a print with the door open.

I’m at about 35mm and the print looks flawless.

Regarding the setting for the PLA, I am using the Generic PLA setting with grey Kingroon filament that I had left over from my Ender 5 printer.

I did learn also that the filament has a speed rating far below the X1-C’s max speed. I’ll be aware of this for future filament purchases.

BTW, the previous prints of this part were on this same exact printer.

Thanks!
Glenn

For future references and with almost a year of experience of the X1C one of the first things I always do with a new filament brand (and before I commit to purchase more) is to perform an volumetric flow test.
This shows relatively fast if an high throughput / melding and layer adhesion can be achieved by the filament. Nothing is worse than to have a fast machine only to be let down by bad filament. And it sometimes is only a difference of 2$ per kg of a spool to have a fast print or a slow or failed print :slight_smile:

Would you care to share how you do your volumetric flow test please?

Hi there,

it is one of the build-in calibration tools of OrcaSlicer: Calibration · SoftFever/OrcaSlicer Wiki · GitHub

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Thanks! I couldn’t find it looking through the main screen, but found it through the menu at the top of the screen (Mac).