<p>You are using a larger than &quot;standard 0.4 mm&quot; nozzle. Large diameter nozzles cause flow volume to increase when the extruder etrusion speed is kept the same as for the standard nozzle which can cause extruding problems like underextruding.</p>
<p>The nozzle diameter increase appears marginal (as in &quot;it is just an extra 0.2 mm in diameter&quot;, but actaully the nozzle increases 50 % in diameter), but has significant effects on the volume flow of the extrusion.</p>
<p>As seen from the table below, when increasing the nozzle diameter for the same printing speed, the volume flow increases from 1.26 mm³/s to 4.24 mm³/s which is a 337.5 % increase of the flow for the selected layer height (0.3 mm).</p>
<p><a href="https://i.sstatic.net/mVxfB.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/mVxfB.png" alt="enter image description here" /></a></p>
<p>This increased flow must be created by your extruder/nozzle assembly and might fall out of the range it can produce for the current setting. Generally this <strong>requires you</strong> to <strong>increase the printing temperature</strong> or <strong>decrease the printing speed</strong>.</p>

CC BY-SA 4.0
2023-09-02T01:41:51.513Z
Thank you, I hadn't even considered that the flow volume might be an issue. I finally calibrated my e-steps last night. Doing that and printing a little bit slower seems to have solved the issue.
Gogeta70
CC BY-SA 4.0
2023-09-01T06:45:53.757Z
2023-09-01T06:45:53.757Z
0scar
<p>I had this in 3 new Ender 3 pro's.   It was the nozzle was too small. I checked the output of the nozzles by extruding and measuring the filament after it hardened right at the nozzle.  A good nozzle will measure exactly to the size.</p>

CC BY-SA 4.0
2023-09-01T00:59:05.760Z
The amount of material the extruder is pushing, not the nozzle size, determines the width of extrusions.
R.. GitHub STOP HELPING ICE
CC BY-SA 4.0
2023-08-31T23:02:27.707Z
2023-08-31T23:02:27.707Z
GoodScience
<p>So I'm having a bit of a strange issue where I'm getting gaps between perimeter walls, but only on part of the print. Even more strangely, it doesn't happen with every print, though it will happen consistently on the same model if I print it more than once.</p>
<p>I know the go-to answer for an issue like this is <code>&quot;You're under-extruding. Fix your e-steps or increase your extrusion multiplier&quot;</code>, however I'm not sure that's the only issue at play here. I did try increasing my extrusion multiplier (tried both 1.05 and 1.10), and while the issue did improve, it didn't fully solve it. The print shown below was printed with an extrusion multiplier of 1.00.</p>
<p>Also worth noting is that there is a bulge in the side of the print toward the bottom, but I'm not sure if it's related to the perimeter wall gaps issue. I have no idea what would cause that.</p>
<hr />
<h2>Basic Info</h2>
<p>Printer: Ender 3 Pro<br />
Filament: Hatchbox PLA (&quot;gray blue&quot;)<br />
Slicer Software: Slic3r</p>
<hr />
<h2>Slicer Settings</h2>
<blockquote>
<p>Note: I am only adding the settings I believe are relevant to the question. If you would like to see a setting not shown here, please let me know and I'll add it.</p>
</blockquote>
<ul>
<li>Print temperature: 200 °C</li>
<li>Bed temperature: 50 °C</li>
<li>Installed nozzle is 0.6 mm.</li>
</ul>
<p><a href="https://i.sstatic.net/WFhg2.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/WFhg2.png" alt="Print speed settings" /></a></p>
<p><a href="https://i.sstatic.net/yj3xg.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/yj3xg.png" alt="Print layer settings" /></a></p>
<p><a href="https://i.sstatic.net/TlZSM.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/TlZSM.png" alt="Printer extruder settings" /></a></p>
<hr />
<h2>Print Images</h2>
<p>This first picture is to show the orientation of the print on the print bed:
<a href="https://i.sstatic.net/rNB1C.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/rNB1C.jpg" alt="Print orientation" /></a></p>
<p><a href="https://i.sstatic.net/TBnv5.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/TBnv5.jpg" alt="Print closeup" /></a></p>

<creality-ender-3><print-quality>
Gaps between perimeter walls on only part of the print
Gogeta70
# Gaps between perimeter walls on only part of the print

(Asked by: username_0 on 2023-08-31)

So I'm having a bit of a strange issue where I'm getting gaps between perimeter walls, but only on part of the print. Even more strangely, it doesn't happen with every print, though it will happen consistently on the same model if I print it more than once.

I know the go-to answer for an issue like this is `"You're under-extruding. Fix your e-steps or increase your extrusion multiplier"`, however I'm not sure that's the only issue at play here. I did try increasing my extrusion multiplier (tried both 1.05 and 1.10), and while the issue did improve, it didn't fully solve it. The print shown below was printed with an extrusion multiplier of 1.00.

Also worth noting is that there is a bulge in the side of the print toward the bottom, but I'm not sure if it's related to the perimeter wall gaps issue. I have no idea what would cause that.

---

## Basic Info

Printer: Ender 3 Pro  
Filament: Hatchbox PLA ("gray blue")  
Slicer Software: Slic3r

---

## Slicer Settings

> Note: I am only adding the settings I believe are relevant to the question. If you would like to see a setting not shown here, please let me know and I'll add it.

* Print temperature: 200 °C
* Bed temperature: 50 °C
* Installed nozzle is 0.6 mm.

[![Print speed settings](https://i.sstatic.net/WFhg2.png)](https://i.sstatic.net/WFhg2.png)

[![Print layer settings](https://i.sstatic.net/yj3xg.png)](https://i.sstatic.net/yj3xg.png)

[![Printer extruder settings](https://i.sstatic.net/TlZSM.png)](https://i.sstatic.net/TlZSM.png)

---

## Print Images

This first picture is to show the orientation of the print on the print bed:
[![Print orientation](https://i.sstatic.net/rNB1C.jpg)](https://i.sstatic.net/rNB1C.jpg)

[![Print closeup](https://i.sstatic.net/TBnv5.jpg)](https://i.sstatic.net/TBnv5.jpg)

**Tags:** creality-ender-3, print-quality


---

## 2 answers

### Answer by username_1 on 2023-09-01. Score: 1 | Accepted answer

You are using a larger than "standard 0.4 mm" nozzle. Large diameter nozzles cause flow volume to increase when the extruder etrusion speed is kept the same as for the standard nozzle which can cause extruding problems like underextruding.

The nozzle diameter increase appears marginal (as in "it is just an extra 0.2 mm in diameter", but actaully the nozzle increases 50 % in diameter), but has significant effects on the volume flow of the extrusion.

As seen from the table below, when increasing the nozzle diameter for the same printing speed, the volume flow increases from 1.26 mm³/s to 4.24 mm³/s which is a 337.5 % increase of the flow for the selected layer height (0.3 mm).

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

This increased flow must be created by your extruder/nozzle assembly and might fall out of the range it can produce for the current setting. Generally this **requires you** to **increase the printing temperature** or **decrease the printing speed**.

> **Comments:**
> **username_0**: Thank you, I hadn't even considered that the flow volume might be an issue. I finally calibrated my e-steps last night. Doing that and printing a little bit slower seems to have solved the issue.  

---

### Answer by username_2 on 2023-08-31. Score: 0

I had this in 3 new Ender 3 pro's. It was the nozzle was too small. I checked the output of the nozzles by extruding and measuring the filament after it hardened right at the nozzle. A good nozzle will measure exactly to the size.

> **Comments:**
> **username_3**: The amount of material the extruder is pushing, not the nozzle size, determines the width of extrusions.  

---

