PETG breaking walls and unregular patterns
Hi,
I recently got some issues with an error pattern, that I am unable to match to a cause (yet). Maybe somebody else has seen this?
The pictures below show two different models with two different types of PETG filament from different vendors.
Here is what I see:
- The surface on outer walls gets uneven, develops occasional spots and cracks easily.
- The first couple of layers of a print usually are acceptable, but with increasing height, the problem appears, but doesn't seem to get worse as higher it gets.
- There are occasional breaks in the pattern on bigger prints which then return to the normal quality, before decaying again.
- Especially the model 02.07 has been printed with the same print settings before without problems.
- Other models seem to print fine (with different filaments), but these do not include straight walls or are of significant height.
- I was guessing the belt tension might have caused this, but the problem is persisting after re-tensioning.
I take suggestions of what to look into.
thx, d.
Best Answer by Neophyl:
Thats not belt tension, it looks purely like an extrusion issue. So look at partial clog, feed gears- tension, ptfe tubes, confirm the extruder thermistor is reading accurately etc. Basically anything that can cause problems with extrusion.
RE: PETG breaking walls and unregular patterns
Thats not belt tension, it looks purely like an extrusion issue. So look at partial clog, feed gears- tension, ptfe tubes, confirm the extruder thermistor is reading accurately etc. Basically anything that can cause problems with extrusion.
RE: PETG breaking walls and unregular patterns
Thats not belt tension, it looks purely like an extrusion issue. So look at partial clog, feed gears- tension, ptfe tubes, confirm the extruder thermistor is reading accurately etc. Basically anything that can cause problems with extrusion.
Thanks. Especially the feed gears tension I'll have a look into. I had to clean the filament sensor on the printer (mk4s) and needed to remove the gear cover for that lately. I'll let you know.
RE: PETG breaking walls and unregular patterns (solved)
So, after a while (and some hedge/garden work that came in the way): Replacing the nozzle with a clean one worked. I didn't have the tool handy to clean the current nozzle, so I put in the obsidian-one I had laying around. Immediate improvement.
I also noticed some slight wear-and-tear on the the silicon-cover over the print head. (#cough) and replaced that one as well.
Thanks for diagnosing this.