PETG HF Help

Bambu Lab X1 Series Bambu Lab X1C
1

Another PETG help question. I can’t get PETG to print properly. I’ve got a new spool of white Bambu PETG HF. I dried it in the X1C for 12 hrs at the recommended temp before placing in the AMS. Printing was pants. I dried it again for another 12 hrs at the recommended temp. It’s still pants. I tried to manually calibrate the flow which took many attempts to print as the filament keeps sticking to the nozzle which lifts filament off the bed and drags is across the print. At the start of the print it can also drag extruded filament across the plate as the wiper did not clean the nozzle. Manual calibration K factor set to 0.2. Tthe following is the result of the benchy test print.

1
11600×1200 344 KB

2
21600×1200 171 KB

X1C Printer settings:
Machine software version –01.08.02.00
Bambu studio software version – 1.9.3.50
0.4 hardened steel nozzle
Textured PEI plate with glue on as prints rarely stick without it (not even PLA), plate was washed in warm soapy water, rinsed and dried before glue was added.
Standard PETG HF filament profile (bed temp 70, nozzle initial 230 then 245)
0.2mm Standard @BBL X1C

I then changed the filament temp/speed settings as per the following recommendations - Bambu Lab X1 Carbon PETG Settings - Get Perfect Prints. Plate temp up to 80, nozzle 255/265, speed varies between 125 and 250. Set benchy to print with auto flow calibration turned on. It’s still pants! The layer quality was so bad I stopped the print.

3
31063×858 139 KB

4
41198×1002 178 KB

When checking the benchy I did hear popping noises coming from the nozzle. I have read that this is likely to be moisture cooking off in the nozzle. I dried the filament in the recommended way twice……could this be a flow rate problem?

2

The problem is the K factor. 0.2 is probably too high.
It is recommended to try with 0.025 or 0.03

I also attached a test model to try to confirm the issue better.
PETG-HF Test.gcode.3mf (379.3 KB)

2 Likes
3

Thanks for the info, I did an automatic calibration and the printer has set the K figure as 0.023. I also ran a flow callibration with the following result on the benchy print.

5
5800×600 76.8 KB

6
61200×900 176 KB

7
71200×900 162 KB

I’ll print the test file and will get back when done.

1 Like
4

I see alot of layer lines here, like with my problem. If you have any solution or found the magic setting, yet, that would be great.

5

In my case decreasing acceleration (to 1000mm/s²) and speed (to 100mm/s) for outer perimeter helped a bit (not completely). But my initial issues looked not as dramatic as yours to be honest :grimacing:.

6

Issue with PETG-HF and AMS Lite on Bambu Lab A1

I have a Bambu Lab A1 with AMS Lite and I’m using PETG-HF filament. The AMS detects the filament correctly, but when I try to print, the printer says it’s “incompatible.”

What I’ve tried so far:

  1. Manually selecting PETG-HF in Bambu Studio → Still marked as incompatible.
  2. Forcing a standard PETG profile and adjusting settings → No success.
  3. Disabling RFID detection in printer settings → Didn’t fix the issue.
  4. Loading the filament manually without AMS → Same problem.

Has anyone else experienced this problem with PETG-HF and AMS Lite? Any solutions?

7

Did you check the upper left in the Printer section on the Prepare tab to make sure that you are selecting the right printer and nozzle? That sounds like the error you get when you try to use a model that has a different printer specified so you have to correct that first.

Make sure it says “Bambu Lab A1” and the nozzle that you currently have installed.

8

I had the right printer en the correct nozzle of 0.4. So that should be alright?