X1C having issues with PLA and PLA-CF

Bambu Lab X Series Bambu Lab X1C
1

Hi,

A few days ago my prints started failing (see image);

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  1. I print with PLA-CF often on my bambulab X1-C;
  2. It was working well for weeks, but not sure if I tried to print too detailed parts or what… started not printing entire parts.
  3. I did clean the Extruder, did cold pulls, etc. The printer got to print in PLA again correctly, but not in PLA-CF;
  4. It works better in PLA than PLA-matte
  5. The infills seem to not be working;
  6. Did calibrated multiple times, but the calibrations work, but during the print those are the results.
  7. Replaced the inner gear with a new one. Problem continued;
    image
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Any help? thank you so much!!

2

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3

How are you drying your filament?

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4

I’ve also had issues with PLA-CF. One fantastic initial print of some desk organizing containers and then trouble, trouble, trouble, with spaghetti, etc. Just cleaned out my extruder and will try again with one specific additional step that JonRaymond notes—I will use my AMS 2 to dry my filament before printing. I don’t have high humidity and keep it stored secured with excess desiccant, but will still dry before printing. We will see if that helps. I hope so, because I love the feel of the PLA-CF.

5

Humidity is 25% right now, and it’s messing up on PLA as well;

Lot’s of stringing on basic PLA

6

Hi,

My 2C worth.

The stringing suggests moisture in the filament. I dry mine @50C for 6 hours.

Also, you might use your cleaning rod and ensure the hot end is not partly clogged. I’ve found this to be an occasional issue too.

7

So frustrating. Anything you can see on the timelapse?

Are you using the custom calibration settings for the filament?

I wish I had more than just questions!

8

Camfor—Is your understanding of the issue that there is under-extrusion? That would make sense to me… machine thinks it is putting out more filament than it actually is because of the partial clog.

9

Yes. I’ve had this where everything appears OK but isn’t.

I manually set the temp to, say, 250C, then push the cleaning rod up into the extrusion nozzle. Back’n’forth a bit. Any debris should come out when you pull the rod out.

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