<p>Good to hear! Going forward, I have found that you can mitigate a leak in the nozzle of the SV06 without disassembling. As filament residue can accumulate around the nozzle, leaks can follow. Heat up the nozzle and use a small wire brush or a nozzle cleaning needle to gently clean away any buildup.</p>
<p>Note that poor quality or inconsistent filament can cause extrusion issues, including leaks. Try using a different, high-quality filament to see if the problem persists.</p>
<p>You could also check that the extruder is properly calibrated. If it's over-extruding, it can lead to a leak. Calibrate the extruder steps/mm to ensure the right amount of filament is being extruded.</p>

CC BY-SA 4.0
2024-05-29T08:35:38.873Z
A leak doesn't go away with cleaning, it is a physical defect that has to be addressed by tightening up the hotend assembly.  Note that the OP was testing at a flow modifier of 0.8, so leaking (as you are referring to it; you might better be calling that material pickup) cannot happen. This reads as a generic answer, possibly written by or with the help of an assistant that it doesn't appear to answer the question. The last 2 paragraphs are not applicable in this question since the OP is clearly under extruding as can be seen in the images.
0scar
CC BY-SA 4.0
2024-05-28T19:14:16.103Z
2024-05-28T19:14:16.103Z
HT the BME
<p>It turns out I have a leak in the nozzle. The problem goes away after I disassembled the nozzle, cleaned it and tightened it.</p>

CC BY-SA 4.0
2024-05-27T22:58:04.997Z
2024-05-27T22:58:04.997Z
Pegasis
<p><img src="https://ibin.co/826zClMDyEdP.jpg" alt="Image1" /></p>
<p><img src="https://ibin.co/826zKseXpU15.jpg" alt="Image2" /></p>
<p>I printed this model using 250 °C nozzle temperature using PETG. I also set the extrusion multiplier to 80 % so I know it's not caused by over-extrusion.</p>
<p>The printer is SV06 Plus</p>
<p>What could cause the burnt filament?</p>

<petg>
Burnt PETG extrusions
Pegasis
# Burnt PETG extrusions

(Asked by: username_0 on 2024-05-16)

![Image1](https://ibin.co/826zClMDyEdP.jpg)

![Image2](https://ibin.co/826zKseXpU15.jpg)

I printed this model using 250 °C nozzle temperature using PETG. I also set the extrusion multiplier to 80 % so I know it's not caused by over-extrusion.

The printer is SV06 Plus

What could cause the burnt filament?

**Tags:** petg


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## 2 answers

### Answer by username_0 on 2024-05-27. Score: 5 | Accepted answer

It turns out I have a leak in the nozzle. The problem goes away after I disassembled the nozzle, cleaned it and tightened it.


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### Answer by username_1 on 2024-05-28. Score: -1

Good to hear! Going forward, I have found that you can mitigate a leak in the nozzle of the SV06 without disassembling. As filament residue can accumulate around the nozzle, leaks can follow. Heat up the nozzle and use a small wire brush or a nozzle cleaning needle to gently clean away any buildup.

Note that poor quality or inconsistent filament can cause extrusion issues, including leaks. Try using a different, high-quality filament to see if the problem persists.

You could also check that the extruder is properly calibrated. If it's over-extruding, it can lead to a leak. Calibrate the extruder steps/mm to ensure the right amount of filament is being extruded.

> **Comments:**
> **username_2**: A leak doesn't go away with cleaning, it is a physical defect that has to be addressed by tightening up the hotend assembly.  Note that the OP was testing at a flow modifier of 0.8, so leaking (as you are referring to it; you might better be calling that material pickup) cannot happen. This reads as a generic answer, possibly written by or with the help of an assistant that it doesn't appear to answer the question. The last 2 paragraphs are not applicable in this question since the OP is clearly under extruding as can be seen in the images.  

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