<p>This could be a sign of moisture in the filament or a worn out nozzle.</p>
<p>As it is heated, the moisture in the filament expands and produces bubbles/defects as it leaves the nozzle. If you hear popping while extruding at a slower flow rate you likely have wet filament. Particularly if this does not happen with other filaments you should first attempt to dry it.</p>
<p>Since you mentioned noticing a bias as to where the defect occurs there is also a possibility this is a worn out nozzle. A worn out nozzle can have an oblong oriface, which leads to asymmetrical and flawed extrusion. I think this is less likely to be your problem (depending on the hours on the nozzle) but it is worth keeping in mind.</p>
<p>If you could share your sliced file it would be helpful for ruling out slicing issues too.</p>

CC BY-SA 4.0
2024-08-27T21:29:24.687Z
2024-08-27T21:29:24.687Z
numanair
<p>I got the following printing problems</p>
<p><a href="https://i.sstatic.net/cWadwoQg.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/cWadwoQg.png" alt="enter image description here" /></a></p>
<p><a href="https://i.sstatic.net/DdOMeYx4.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/DdOMeYx4.png" alt="enter image description here" /></a></p>
<p>I can suggest that it is happening stronger in one half</p>
<p><a href="https://i.sstatic.net/2fZNCWtM.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/2fZNCWtM.png" alt="enter image description here" /></a></p>
<p>What can be the reason?</p>
<p>Printer is Creality 3D Ender, filament is marked as PLA.</p>

<print-quality><pla><filament>
Uneven filament printing with bubbles or drops
Dims
# Uneven filament printing with bubbles or drops

(Asked by: username_0 on 2024-08-24)

I got the following printing problems

[![enter image description here](https://i.sstatic.net/cWadwoQg.png)](https://i.sstatic.net/cWadwoQg.png)

[![enter image description here](https://i.sstatic.net/DdOMeYx4.png)](https://i.sstatic.net/DdOMeYx4.png)

I can suggest that it is happening stronger in one half

[![enter image description here](https://i.sstatic.net/2fZNCWtM.png)](https://i.sstatic.net/2fZNCWtM.png)

What can be the reason?

Printer is Creality 3D Ender, filament is marked as PLA.

**Tags:** print-quality, pla, filament

---

## 1 answers

### Answer by username_1 on 2024-08-27. Score: 1

This could be a sign of moisture in the filament or a worn out nozzle.

As it is heated, the moisture in the filament expands and produces bubbles/defects as it leaves the nozzle. If you hear popping while extruding at a slower flow rate you likely have wet filament. Particularly if this does not happen with other filaments you should first attempt to dry it.

Since you mentioned noticing a bias as to where the defect occurs there is also a possibility this is a worn out nozzle. A worn out nozzle can have an oblong oriface, which leads to asymmetrical and flawed extrusion. I think this is less likely to be your problem (depending on the hours on the nozzle) but it is worth keeping in mind.

If you could share your sliced file it would be helpful for ruling out slicing issues too.


---

