Issues with petg print bridges,overhangs adn botton/top layers

[OZprint]

Hello everyone!

I,m New in 3d printing, I started this about 2 months ago. I mostly print with ready-made models.But now I had to create my own and print it too and facing with many problems.

so on start i try print this model with standart settings in bambu studio slicer.

all was messy and all major problems was overhangs and bridges so i searched all info for sollution.

then i change settings with suports and with all recommended slicer settings but still i have issue with same, here is photos

and the last i change angle i start printed model 35 degrees almost was smooth until the print finneshed and i see botton layers was stringing and blobbing and the quality wasn’t very good heres photo

and this model the biggest issue was it needs to be as straight and accurate as possible.

and finnaly here is settings on slicer the last used

I would like your suggestions on how to improve the situation and maybe save some time and material, because the total printing time of the model is 17 hours and the material is about 600 grams.

Thank you ito those who are trying to help and have a nice day.

[Rut_Row]

I’m new as well but I discovered the hard way that PETG needs to be dried even if it is fresh out of the bag. Van’t comment on the rest.

[OZprint]

Forgot to say, he was dried. before printing i just put in ams 2 drying about 6-8 hours to 50-60 degrees

[blchandl2]

Have you calibrated your filament for pressure advance and flow ratio? I would put the filament back in the dryer for at least another 6 hours.

[OZprint]

flow ration was calibrated, but where can calibrete pressure ?

[blchandl2]

@blchandl2

Flow Dynamics Calibration | Bambu Lab Wiki

For future reference. The Wiki has a lot of useful information.

[OZprint]

Sorry i think pressure calibration is somting diffrent, I did that before print