4 Fixes for Perfecting Over-Extrusion!

Over-extrusion is often an issue many 3D printing enthusiasts encounter, leading to flawed prints and diminished print clarity. Being a tech trainee named Carolina, I’ve faced over-extrusion challenges too, and I’ve unearthed fantastic strategies to tackle it. A popular approach to counteract over-extrusion is by lowering the nozzle temperature, which subsequently reduces the filament’s liquidity. Tweaking the extrusion coefficient or lessening the slicer’s flow percentage also proves beneficial. Ensure your slicer indicates the accurate filament girth.


There are swift remedies to counteract over-extrusion and some in-depth fixes. Keep reading to grasp how to address over-extrusion concerns.

Why Might You Encounter Over-Extrusion in Your 3D Creations?
From the phrase over-extrusion, we deduce that there’s an excess of material being expelled, jeopardizing your print’s integrity. Over-extrusion may stem from various factors like dimensional inconsistencies and elevated flow metrics. Let’s dive deeper into elements leading to printer over-extrusion and hurdles in the printing sequence.

– Excessive Print Heat
– Misaligned Extruder Movements
– Erroneous Filament Girth
– Mechanical Glitches with the Z-Axis

When the printer’s flow magnitude is too robust and combined with elevated temperatures, the entire task can deteriorate into a jumbled, subpar 3D creation, all credited to over-extrusion.

Rectifying Over-Extrusion in 3D Outputs

1. Modulate the Print Heat to a Suitable Range
At times, merely reducing your print temperature is the silver bullet for amending over-extrusion. High temperatures liquefy the filament more, making it ooze more effortlessly from the nozzle. Controlling this requires adjustments either on the slicer interface or directly on your 3D printing device. Be cautious while regulating temperatures; too low might induce under-extrusion. A gradual reduction, in intervals of 5°C, is ideal. Each filament possesses a unique optimal temperature range, demanding some experimentation.

2. Fine-tune Your Extruder Motions
Calibrating your extruder movements, or e-motions, is pivotal for rectifying over-extrusion. If your printer is instructed to release 100mm of filament and it dispenses 110mm, you’re in the realm of over-extrusion. Many remain unaware of this calibration, so if you’ve overlooked it, it’s prime time to revisit all your 3D printers.

3. Modify the Filament’s Diameter in the Slicing Tool
If your slicing tool isn’t calibrated to the filament’s exact diameter, it might extrude excessively. While modern filament standards have narrowed this issue, it’s still feasible. Using a caliper, you can gauge the filament’s breadth at various points, ensuring the diameter variations remain within acceptable margins (around 0.05mm). After gathering all data points, calculate the average to ascertain the filament’s true diameter.

4. Ease the Gantry’s Rollers
A lesser-known yet effective remedy focuses on the roller apparatus in 3D printers. If the rollers on your printer are overtightened, they move only when they’ve accumulated enough force. This may result in over-extrusion, primarily at the lower layers of your prints.

Addressing Over-Extrusion on Initial Layers
Rectifying over-extrusion during the early layers necessitates calibrating your extruder’s movements. You might also need to decrease your bed’s temperature, given that fans usually remain dormant during the opening layers. Ensuring a perfectly aligned bed is crucial, preventing the nozzle from being too proximate or distant from the print surface.