Can you share a screenshot of your support settings, or are you just using the defaults? I’d also recommend adjusting the cooling settings for the support filament—try to get it as cool as possible. You might want to increase the PETG overhangs from 90% to 100% as well; that can make a difference. If needed, you can also fine-tune the adhesion setting.
Some of my petg filaments on the X1C I lower the bridge flow to 0.85 range.
Make a support test model or download one to save on filaments.
Hi,
usually, i am using the default settings from bambu lab. Hence the not satisfying results, I made some changes. Where do I get to the developer mode?
To access developer mode, if necessary, click the drop-down arrow next to the file in the top left corner. Then, go to Preferences and, at the very bottom, check the box.
You said you was using the Bambu Lab PLA/PETG support as interface they do have a new profile for that filament the nozzle temp is @ 210c
Could you test these settings on a support model as well? I don’t use the Bambu PLA/PETG lab support filament or the Bambu lab PETG, so I’m not sure what works best for these two filaments.
The auxiliary fan may cause parts to warp, so you might need to use 30% or turn it off with certain filaments.
Adjust your support settings to these for the next interface test. However, I will modify the support settings based on the part and filament being used, and switch to manual support mode when necessary.
Choose the interface pattern that minimizes gaps and provides the most solid appearance for the part design.
Keep us updated and I hope this helps you out 
Hi,
as I see by now the automatic assignment of the filament profil is not correct. I use support for PLA/PETG, but the slicers detects it as support for PLA! Unfortunaly, the performance doesn’t enhance ether with your suggested settings.
Meanwhile I get a failure message “extruder is overloaded”, only in the left nozzle. But the filament is supplied by an AMS.
I can only use the right nozzle. A ticket @ Bambu Lab is opened.
how could i start here a topic?
Go to the category you want to start a topic in. For H2D you would go here: Bambu Lab H2D - Bambu Lab Community Forum
Then click the “+ New Topic” button
Try this for now: The extrusion motor is overloaded
Hi,
thank you for your support. i have unclogged the nozzle, there was a rest of PVA in there. Hence, there is definately a problem with PVA.
Futhermore, I am getting AI failure with PETG translucent.
I think H2D is in a beta version.
Are there other users with the same expirience?
You may want to give the Fiberlogy BVOH a try. In pre- Bambu days, PVA troubles led me to look at alternatives. I found the BVOH to be less brittle and more reliable to feed. Similar to PVA, it’ll need to be bone dry and will take up moisture before dessiccant has any effect, i.e. it’ll keep the dessiccant dry.
Sooo.
I also tried PLA-CF with PVA support, but i had to stop the print because i could see on the waste-Tower that the PVA was pushed of the PLA-CF material.
But i have no error information and nothing else.
I just stopped the print and now i try with normal tree support from the same Filament.
It seems so that Bambu lab has to tune the PVA settings so that printing with that works.
I am glad a Pro-Printer postet ideas about the settings i can try.
But it is to early for a 3D print starter to tune the settings to get his first 3D print ever to work.
In the meantime, I feel like I’m going crazy, and it must be my settings. I conducted the same test print on the P1S without making any changes to the settings, and lo and behold—it works excellently. There’s no overly wet filament or anything like that.
I dont think i have shifts or anything.
Material PLA-CF
Layer high 0.16
But i also cant print with PVA.
Not with the standard settings.
No, it is in the calibration options on the touchscreen interface
Here is what I mean by problems with the flow. Based on the flow test at the beginning of a print, you can see that something is wrong with the PETG settings, among other things. I haven’t yet found any settings that would address this issue. I don’t experience this problem with PLA and ASA. Can anyone confirm this behavior?
uhh, your PETG might have bubbles due to it being wet, it’s foaming like crazy
I think the problem is the printer itself. You should sell it right away. I know quite a few people in here would be willing to help you out and take that piece of junk off your hands. 
That just looks like excess moisture to me. Moisture turns to steam and pops, spattering the surrounding plastic around, you can literally see where the bubbles were by the divots and holes it’s leaving on top. PETG will take on moisture a lot faster than PLA
I can‘t imagine that it is a wet filament both were dried at the same process. 12h @55C.
As I wrote I took the same Petg and PVA to my P1S there was no problem with the print quality.
I am a noob at 3D printing and learning.
But have you tried to just start the calibration of the printer again.
Maybe there went something wrong with the calibration.
Like try to clean the plate, close the door and do the calibration again without touching the printer or open the door.
You also could remove the hotends. And try to reinstall them again.
After that you can do the flow calibration again.
For me the problem lookes like the mentioned problem in part 3 of the A1 learning part from Bambu labs.
(It lookes like there are more problems than just one, that messes with your print quality. It feels like a not calibrated printer. Additional to a loose hotend where the clips went loose. Did you move the printer to another surface after calibration, or touched the printer while doing the calibration?)
But it does not qute fit into the picture, that the PLA workes fine, at least with the flow test.
But it would not hurt to try the calibration and flow rate test again. You dont loose anything if you just try that.
This is correct- only the support interface, which is the few layers between the actual supports and the main filament of the actual piece, need to be the support filament.
