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Voids/gaps causes besides wet filament?  

New Member
Voids/gaps causes besides wet filament?

I have been getting these small voids appearing in my prints (Prusa Mini+ partially assembled, no mods).  It looks like a wet filament issue, but I am wondering if there are other causes.  I have tried drying filament for 24 hrs at 45 C and brand new filament (Hatchbox and Prusament) with the same results.

The clincher for me was using the same filament and printing the same model on my Ender 3V2 and there are no voids, which seems to suggest the filament is fine.  See the attached pic.

I saw some posts in Reddit suggesting replacing the PTFE tube in the hot end or replacing the nozzle with a genuine E3D V6 nozzle.

Any recommendations on what to try next?  Thanks!


Posted : 11/01/2023 6:42 am
Luis Medina
New Member
RISPONDI: Voids/gaps causes besides wet filament?

I was experiencing the same problem.

The seam alignment was right. The filament was dry. No under-extrusion.

I came across this other post's comment, and turned out the retraction length was the culprit. When I reduced it to 2.2 mm, as suggested in the post comment, the prints didn't show those voids anymore.

I don't know why this started happening at some point. My Prusa Mini+ worked fine for about 6 months, then this problem showed up.

Could be related to some wear on the extruder, perhaps. Although I've cleaned mine a few times, and haven't noticed anything wrong with it.

Anyways, hope this helps you too! 


Making stuff after office hours
Posted : 29/04/2023 3:50 pm
RE: Voids/gaps causes besides wet filament?

According to my knowledge If the temperature of the extruder is not properly regulated or fluctuates during the printing process, it can lead to inconsistent melting and extrusion of the filament, resulting in voids or gaps.                                        

Posted : 05/06/2023 5:09 am