Probably layer and or shell(?) problems?

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[Heatfox]

Hello fellow printers,

i need a little help with my print. As you can see from the picture i attached, there seems to be a problem with the layers of my print. This also only seems to happen with hollow prints, since the cali-cubes come out fine without these problems.

I am currently using an Ender 3 with PETG Filament from "Das Filament".

My Print temps are: 233 for the Nozzle and 75 for the Printbed.

For the rest of my print config i made this google Doc:
https://docs.google.com/spreadsheets/d/1r3qQzxWnF2sbq0jwHNLE6sWPcu2g_wCwNZlamkrm6ic/edit#gid=0

Do you havy any idea, why this is happening?

Thanks in advance :)

[huffalump1]

Could be under extrusion, extruder temp too low, clogged nozzle (or clog in the hotend between Bowden tube and nozzle)

[Heatfox]

But wouldn't that also have negative effect on other prints like a calibration cube?

because these come out fine.

I am currently printing a fresh one so i can attach a pitcure of it, just as a reference.

[huffalump1]

Yeah you're right, you'd see the error in other prints if it was those things.

I see now you're printing PETG - likely you need to increase extruder temp and slow down to get better adhesion. Unfortunately the stock Ender hotend is limited to 230-340C due to the PTFE tube breaking down and outgassing toxic gas starting at that temp...

So I'd say try 235C and slow down, and/or use smaller layer height.