Unable to get BambuLab PETG Basic to print well at 0.08mm height

Hello,
I’ve wasted a lot of time trying to get a decent print with the BambuLab PETG Basic filament, but nothing I’ve tried made a significant improvement, so I decided it’s time to ask for help.

I have a X1 Carbon with 0.4mm nozzle and AMS.
I’ve tried to print with both Black and Blue Gray colors of the PETG Basic filament.
I’ve dried the filaments at 85°C for 12h inside the printer and they’ve been in the AMS for weeks before that.
I started printing using the official “Bambu PETG Basic @BBL X1C” filament profile and after it didn’t give me the results I wanted, I ran multiple calibrations with OrcaSlicer, but they didn’t really help much.

My settings are:

And this is the result. The shiny Benchy was printed with the same process settings but with the Devil Design PETG filament (and it’s own filament profile).



Some close-ups:



Here is a comparison between the default filament profile (on the left) and my modified one (on the right).



I also tried to print using the Devil Design filament profile but it didn’t make a difference.

Is the BambuLab filament defective or am I doing something wrong?

My friend, I would say you’re NOT doing anything wrong. In fact, from where I stand, you’ve gone through just about all the troubleshooting steps one could ask. Kudos to you for sticking it through. :clap:

Sighhhh… but sometimes, Occam’s razor is the answer. That being when all the other possibilities are exhausted, the obvious one is the answer. In this case, I am afraid that the Bambu PETG just doesn’t measure up.

I’ve used Bambu PETG and I have to say, my results were not too different from yours on my P1. I was underwhelmed with the performance and was able to get better results from other brands.

Since you appear to be experiencing better performance with another brand. Why stick with Bambu at all?

Thanks for the reply!

I’ve got 10kg of Bambu PETG Basic filament. :grimacing:

I guess, if it’s not possible to print at 0.08mm with it, I’m only going to use the Bambu PETG filament for prototyping at 0.2mm. ¯_(ツ)_/¯

The only thing that I might suggest, if you haven’t already tried it, consider using silent mode which will reduce all movements to 50%. That’s usually my fallback when everything else I tried fails.

If it does work, then you know that reducing speed “might” be a remedy or at least a partial remedy. Then you can go into the speed sub menu and start tweaking each parameter to see which one responds. It’s hideously slow debug process but if you’ve got 10 spools and don’t want to waste money with constant reprints, it might be your only recourse.

@sobol6803, I’ve read quite a bit about people having trouble with the Bambu PETG specifically. I personally have not tried their PETG, but I have successfully printed many hours with Hatchbox if you want to look at the filament as the variable in question.

With that being said, let’s backup a bit with your current filament/profile. One thing I have noticed is that PETG doesn’t like printing below .12 resolution much. For what it is worth, the nature of PETG is such that you may not notice a aesthetic difference printing at the higher resolution anyway. If I’m in your shoes here is what I would try:

  1. pull off enough filament from your 10kg spool to print a small model like the benchy.
  2. print this model on a default setting for .12 layer height.
  3. Try to avoid a model that requires support so we can eliminate that variable for this test.
  4. One thing I always do is heat the bed at least 10-15 minutes prior to starting a PETG print. I’m looking to get a nice uniform base temperature inside the chamber. This helps for me.
  5. Report back!

PETG is a great material, but it’s what I consider an advanced material. So, frustration comes with the territory, but it shouldn’t be something you have to suffer through too long if we can get a base print successfully printed uniformly.

Even at 0.12mm it’s pretty bad (default profile). Better than 0.08mm, but still bad.