Cant calibrate PETG

Bambu Lab P1 Series Troubleshooting
1

I’m not even sure what to do with these calibration results for Flow Dynamic.
Even the purge line looks awful.
I previously had trouble with PETG-HF. Dried it for much longer and pumped out some calibration cubes that don’t look too bad besides some gaps in the top and bottom layers (what looks like an under extrusion to me).
Not even sure what settings I can adjust to fix this. Figured I’d try some of the built in calibration.
Now what???

THANKS!!!

IMG_6127
IMG_61271920×1079 178 KB

IMG_6129
IMG_61291920×2102 118 KB

2

Two thoughts:

  • You could try to clean the plate again with dawn & water and then apply a few lines of glue stick which you the evenly spread across the plate for a nice, thin adhesive/release film. (You did set the correct plate in the slicer, right? Happened to me a few times)
  • Could it be that you have a partial clog? That could be addressed by a cold pull. Nozzle/Hotend Unclogging Procedure for X1 | Bambu Lab Wiki
3

Checked the plate (even accidentally ran a print without a plate).
I did think about using glue. Haven’t done it yet.
Don’t think its a clog. I have tried other prints in between with PLA again and they come out beautiful.

4

Mixed/Multi-material printing is also a risk factor for a clog. Much reduced since last years autumn, but you can check easily. Just use the display to heat the nozzle to say 240°C and then extrude filament into the poop chute. If it comes out straight and strong, extrude some more to be sure and then you know that is not it. If the extruder slips or the filament curls when exiting the nozzle, somethings not right with it.

1 Like
5

Will check that. Thank you.

1 Like
6

Update:
Obtained a new dryer. Dried for an additional 14 hours at 70C.
Tried to run calibration again this morning, and got this…

IMG_6135
IMG_61351920×2560 497 KB

7

Did you check for a (partial) clog beforehand?

8

Checked. Filament seems to be extruding fine when manually fed. Ran a few cold pulls anyways. Then ran some cleaner filament through it.
About to attempt calibration again.

9

:white_check_mark: Dried Filament
:white_check_mark: Nozzle Clog
%Edit start
:white_check_mark: Cleaned Build Plate
:white_check_mark: Applied glue
%Edit end
:crossed_fingers: Calibration

10

Clean bed seems to be missing :slight_smile:

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11

You are right :smiley:

The pictures looked good in that though. Even with glue :+1:

12

I’m impressed something that ugly stuck to the plate :rofl: But seriously, I would start fresh with the standard filament profile from the bottom so there’s no strange config like fan or temp etc to get in the mix and start the fresh calibration.

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13

Honestly, thats what I have done. Standard settings from the beginning. That’s even why I bought Bambu filament as well. The bed isn’t really dirty, it’s just some bambu glue that I went back and spread evenly.
After all the checks, I still was not able to pull off any sort of successful calibration of the PETG-HF. However, I did print some things with it and it seemed to work and look good.
(I am not onto another project messing with TPU again. I have previously gotten beautiful prints with TPU, but not this time. Seems to be the same issue as the PETG-HF)

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14

The last time I had adhesion issues after cleaning the build plate with good quality dish soap and then thoroughly rinsing with clean water, I downloaded the tramming gcode and ran that through. The tramming was significantly out but after completing the procedure, prints had perfect first layers and still do several months after.