I own a spool of PETG and I have been having major print quality issues: layer offsets, chunks of 3d print strewn across the buildplate and other things. I traced these effects to a single culprit: rough layers. I don't know how to fix this. I haven't had this issue at all with all of my other PETG filament colors. And the buildplate height is just where it needs to be, so why is this happening?

Print settings

  • Layer height: 0.23 mm
  • Extruder: 235 °C
  • Bed: 80 °C
  • Retraction length: 6 mm
  • Retraction extra restart length: 0.3 mm
  • Z-Hop height: 0.25 mm
  • Base print speed: 45 mm/s
  • Extrusion ratio: 106%
  • $\begingroup$ What slicer are you using? Do you have "combing" enabled? $\endgroup$ Apr 7 at 3:25
  • $\begingroup$ I am using Flash print. I dont know where to find "combing in my print settings" @R..GitHubSTOPHELPINGICE $\endgroup$
    – X Builder
    Apr 8 at 18:15

1 Answer 1


You are probably over extruding, this causes an excess amount of filament causing the mentioned problems. PETG is softer than PLA, so the extruder teeth grip deeper into the filament. This smaller diameter causes too much filament flow. Try to decrease the flow modifier for this spool of PETG.


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