PETG Artefacts on start point?  

RE: PETG Artefacts on start point?

I have a guess, that it can relate to the nozzle... cause the result is easily splits on layers 🙁

RE: PETG Artefacts on start point?

First thing to try:  Dry the filament.  60-65C for at least 2 hours, 4 would be better.  Then try again.

And yes, brand new filament right out of the sealed package can have enough moisture to cause problems.

RE: PETG Artefacts on start point?

@olexmacc

@scottw is not wrong, could you also Post the project file your showing in the images above so that we could take a look at the settings your using to make sure there's not a problem on that end. For example printing PETG using PLA settings etc, etc, (yes this happens)

To post a project file exported from PrusaSlicer with all your settings, you must Zip compress the .3mf project file first. Then use the [Add Media] button at the top of the Reply window, drag and drop the file into that window, and then use the "Insert into post" button to post it.

Note: The file will not post if it is not Zip compressed.

Good luck,

RE:

Posted by: @snuffleupagus

For example printing PETG using PLA settings etc, etc, (yes this happens)

Good point -- That bad layer adhesion could be temperature too low for PETG.  I have just had so many "brand new, sealed spools" of PETG and Nylon that printed like they had been stored at the bottom of a swimming pool -- so drying is the first place I go.  🙂

RE:

Firstly, thanx a lot for your answers! 

1. Ich will try drying the filament and then come back with the report. 
2. Please find the print file attached. roller_0.2mm_PETG_MINI_2h42m.gcode
3. This is the filament I use: https://www.prusa3d.com/en/product/violet-transparent-petg-filament-1kg/

RE: PETG Artefacts on start point?

@snuffleupagus already told you here, but you probably aren't paying attention! Do not send the gcode file. It is useless. In the slicer, use the File -> Save project as option and you will get a *.3mf file. Save this file in *.zip format and insert it into the post by selecting Add file at the bottom left below the post text window.

RE:

Sorry :). here is the 3mf. 
roller.3mf

P.S. There is no reason to shout on me. :)) To create the 3mf I must start the slicing process again. My intention was to show the original file.

RE:

@olexmacc

No one shouted at you, (!) is an exclamation, SHOUTING IS THIS, GET IT?!? don't go there, it's the fastest way to make people not help you, we have had very good and helpful people band from here because of newbs that started problems, and your will be ignored so fast it will make you head spin.

You provided the wrong information even though you were asked very specifically for certain information, you made a mistake don't start a problem because of it.

It's a sensitive issue.

RE: PETG Artefacts on start point?

To create the 3mf I must start the slicing process again.

 No, you don‘t. The 3mf saved by slicer is the same wether you hit the slice-button or you don’t. But I know what you mean, as I did in the beginning you are probably just keeping the STL and GCode files of your projects. That’s not a good idea, instead you should always save the project in slicer as a 3mf file (just hit ‘save’ in the menu). This way you save everything including the model and the settings. Even if you later change settings on your slicer profiles the 3mf still contains the original settings…

RE: PETG Artefacts on start point?

@snuffleupagus
No one shouted at you, (!) is an exclamation, SHOUTING IS THIS, GET IT?!?

Now you did shout at him! 😂🤣

Update

1. I dried filament first and it got better. Still far from satisfying but less bubbles and not as breakable.
2. Then I changed the nozzle  to a new one (+ made some general maintanance) and the result is almost perfect. However there is still a visible scar on the same place and side.

See the attached images...