<p><code>Minimum Travel after Retraction</code> is exactly what it says on the tin: if the travel after a retraction would be less than 2 mm, it does <em>not</em> retract. You'll want that to be short, but not 0, because retraction can lead to under extrusion at the start of a new line, and every swap from one shell to the next shell right next to it is classed as travel.</p>

CC BY-SA 4.0
2021-01-16T00:48:02.043Z
I think so but you see somw travwl got very long distant but it still not retract which so confusing.
M lab
CC BY-SA 4.0
2021-01-16T09:47:10.187Z
Set it to line width and see what happens?
Trish
CC BY-SA 4.0
2021-01-17T05:25:22.700Z
0.4 or slightly over should work fine.
R.. GitHub STOP HELPING ICE
CC BY-SA 4.0
2021-01-17T05:26:25.240Z
Retraction does not cause underextrusion though; rather it's necessary to prevent it.
R.. GitHub STOP HELPING ICE
CC BY-SA 4.0
2021-01-18T13:48:40.493Z
Okay then any way to make 3d printer just lift the nozzle up with no retraction?
M lab
CC BY-SA 4.0
2021-01-15T12:27:05.333Z
2021-01-15T12:27:05.333Z
Trish
<p>The printer does not retract the filament for some travel moves result in scrape printing part as shown in picture.</p>
<p><a href="https://i.sstatic.net/XhwJa.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/XhwJa.png" alt="enter image description here" /></a></p>
<p>This is my printer setting. Not sure which part be the problem.</p>
<p><a href="https://i.sstatic.net/LDEHB.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/LDEHB.png" alt="enter image description here" /></a></p>
<p>I want my printer to retract the filament as I have set it to. Where to check and what could be the problem?</p>

CC BY-SA 4.0
2021-01-15T13:42:23.740Z
What is meant by "`result in scrape printing part`"?
0scar
CC BY-SA 4.0
2021-01-15T16:23:50.033Z
The nozzle do rapid move and hit under layer. Sometimes the build plate shifted or the part popped out from bed.
M lab
<retraction><prusaslicer>
Filament doesn't retract for some travel movements using PrusaSlicer
M lab
# Filament doesn't retract for some travel movements using PrusaSlicer

(Asked by: username_0 on 2021-01-14)

The printer does not retract the filament for some travel moves result in scrape printing part as shown in picture.

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

This is my printer setting. Not sure which part be the problem.

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

I want my printer to retract the filament as I have set it to. Where to check and what could be the problem?

**Tags:** retraction, prusaslicer
> **Comments:**
> **username_1**: What is meant by "`result in scrape printing part`"?  
> **username_0**: The nozzle do rapid move and hit under layer. Sometimes the build plate shifted or the part popped out from bed.  

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## 1 answers

### Answer by username_2 on 2021-01-15. Score: 1

`Minimum Travel after Retraction` is exactly what it says on the tin: if the travel after a retraction would be less than 2 mm, it does *not* retract. You'll want that to be short, but not 0, because retraction can lead to under extrusion at the start of a new line, and every swap from one shell to the next shell right next to it is classed as travel.

> **Comments:**
> **username_0**: I think so but you see somw travwl got very long distant but it still not retract which so confusing.  
> **username_2**: Set it to line width and see what happens?  
> **username_3**: 0.4 or slightly over should work fine.  
> **username_3**: Retraction does not cause underextrusion though; rather it's necessary to prevent it.  
> **username_0**: Okay then any way to make 3d printer just lift the nozzle up with no retraction?  

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