Top Ways To Fix 3D Printer Bubbles in Filament

Hey tech enthusiasts! It’s Carolina here, your go-to guide for all things dazzling in the tech realm. If you’re as passionate about 3D printing as I am, you’ve probably faced a few snags here and there. Ever encountered a peculiar issue called bubbling or popping when 3D printing? It’s a tricky one! Well, let’s dive into how we can tackle this together.


The secret to saying goodbye to those pesky bubbles and startling popping noises is pretty simple. Ensure you get rid of any moisture in your filament before initiating the print. When damp filament is exposed to soaring temperatures, it tends to act up, leading to these issues. Prioritize using top-tier filament and always store them properly. As we move forward, I’ll be sharing some nifty insights and handy tips to keep such problems at bay.

Why Do Bubbles Appear in the Filament?
During the printing journey, filaments can trap air, leading to complications for our beloved 3D prints. Not only can this derail the entire process, but the presence of bubbles can also disrupt the uniformity of the filament diameter. Moisture, as previously discussed, plays a big role, particularly in affecting the first layer of our prints. The golden ticket here? Drying your filament prior to extrusion!

Common Culprits of Bubbling in Filament:
– Moisture in the filament
– Misconfigured slicer settings
– Lackluster filament cooling mechanisms
– Inaccurate flow rate
– Overzealous printing temperatures
– Subpar filament quality
– Nozzle material not up to par

Carolina’s Guide to Banishing 3D Printer Filament Bubbles:

1. Address Filament Moisture:
Moisture is a notorious villain in 3D printing. When filament undergoes the extrusion process with trapped moisture, it can lead to unsightly bubbles in the print. Thankfully, there are dedicated filament dryers available, like the SUNLU Filament Dryer, that can come to our rescue.

2. Optimize Those Slicer Settings:
Certain slicer settings can dramatically improve your print outcomes. Focus on:
– Retraction configurations
– Coasting adjustments
– Wiping tweaks
– Resolution modifications

3. Enhance Filament Cooling:
Filament that doesn’t cool efficiently can cause print deformations. Equip your printer with robust cooling systems to prevent such hiccups. Designs like the Hero Me Fanduct are excellent choices for this.

4. Tune In to the Correct Flow Rate:
If filament lingers too long at high temperatures, it’s bound to act up. Adjusting flow rates, particularly the ‘Outer Wall Flow’, might be the solution you need.

5. Regulate Printing Temperatures:
Scorching temperatures can be a root cause of bubbles. Ensure you’re printing at the right heat levels, taking filament moisture content into consideration.

6. Choose Superior Filament:
Opting for a reputable filament brand can save you a world of trouble. Trust me, it’s worth investing a bit more for a hassle-free printing experience.

7. Pick the Right Nozzle Material:
The nozzle material matters! Brass, for instance, excels in heat conduction, making it a top pick for many. If you’re switching nozzle materials, remember to recalibrate your printing temperatures accordingly.