<p>(answering my own question)</p>

<p>The problem was the extrusion distance settings in Cura's advanced tab, reducing the value to 1.5mm solved the problem.</p>

<p>Other problems with the same symptoms:</p>

<ul>
<li>Partially blocked hotend nozzle.</li>
<li>Incorrectly configured steps per mm for the extruder motor - <a href="https://www.youtube.com/watch?v=YUPfBJz3I6Y">this youtube video</a> shows how to test and configure this. </li>
</ul>

CC BY-SA 3.0
2016-01-17T13:27:51.030Z
2016-01-17T13:27:51.030Z
Nir
<p>My printed objects have horizontal holes in them (as seen I the picture below):
<a href="https://i.sstatic.net/tSNwG.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/tSNwG.png" alt="enter image description here"></a></p>

<p>This doesn't only look bad it also makes the object break at the seems.</p>

<p>Looking carefully at the printing process I can see that after a retraction there's a small amount of time the hotend isn't extruding plastic.</p>

<p>Material: PLA, Printer Robo 3D R1+, Slicer: Cura</p>

<extrusion>
Holes/ missing layers (after retraction) in 3d printed objects
Nir
# Holes/ missing layers (after retraction) in 3d printed objects

(Asked by: username_0 on 2016-01-17)

My printed objects have horizontal holes in them (as seen I the picture below):
[![enter image description here](https://i.sstatic.net/tSNwG.png)](https://i.sstatic.net/tSNwG.png)

This doesn't only look bad it also makes the object break at the seems.

Looking carefully at the printing process I can see that after a retraction there's a small amount of time the hotend isn't extruding plastic.

Material: PLA, Printer Robo 3D R1+, Slicer: Cura

**Tags:** extrusion

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## 1 answers

### Answer by username_0 on 2016-01-17. Score: 9 | Accepted answer

(answering my own question)

The problem was the extrusion distance settings in Cura's advanced tab, reducing the value to 1.5mm solved the problem.

Other problems with the same symptoms:

* Partially blocked hotend nozzle.
* Incorrectly configured steps per mm for the extruder motor - [this youtube video](https://www.youtube.com/watch?v=YUPfBJz3I6Y) shows how to test and configure this.


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