<p>It appears as though you are using (or used) an old version of Cura. More recent releases allow you to insert G-code commands on changing the extruder. You could insert a Z-hop in these sections. </p>

<p><strong>Extruder End G-code</strong>: First set the extruder in a relative mode, move up 2 mm, set absolute again:</p>

<pre><code>G91
G1 Z2
G90
</code></pre>

<p><strong>Extruder Start G-code</strong>: First set the extruder in a relative mode, move down 2 mm, set absolute again:</p>

<pre><code>G91
G1 Z-2
G90
</code></pre>

<p>You could even do filament retractions to prevent oozing or stringing!</p>

<p><em>Note that this assumes both hotends are on the same carriage!</em></p>

<p><a href="https://i.sstatic.net/TqkUo.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/TqkUo.png" alt="Cura printer extruder start and end code sections"></a></p>

<p>An alternative you could try is to use a print server that is able to inject G-code scripts, an example is OctoPrint:</p>

<p><a href="https://i.sstatic.net/Tgzn4.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/Tgzn4.png" alt="OctoPrint tool change start and end code sections"></a></p>

CC BY-SA 4.0
2018-08-06T20:05:10.770Z
2018-08-06T20:15:14.533Z
2018-08-06T20:15:14.533Z
0scar
<p>I'm using a Lulzbot KITTAZ with V2 Dual extruder(0.5mm). When I'm printing anything, the front left side of the print is getting disturbed because whenever the tool head switches the action between the extruders, they stop at the front left point of the print. They are not performing the Z-hop and because they are hot they are disturbing the print at that point.
These are the settings that are currently set:
<a href="https://i.sstatic.net/tXWta.jpg" rel="noreferrer"><img src="https://i.sstatic.net/tXWta.jpg" alt="Print Settings in cura"></a></p>

<p>The print with the disturbance:
<a href="https://i.sstatic.net/7Dh69.jpg" rel="noreferrer"><img src="https://i.sstatic.net/7Dh69.jpg" alt="Disturbed print"></a></p>

<p>Sometimes the whole print is getting dragged to the extruders.</p>

<print-quality><abs><z-axis><dual-nozzle>
No Z hop in Dual extruder, print getting disturbed at retraction point
Veda
# No Z hop in Dual extruder, print getting disturbed at retraction point

(Asked by: username_0 on 2017-01-20)

I'm using a Lulzbot KITTAZ with V2 Dual extruder(0.5mm). When I'm printing anything, the front left side of the print is getting disturbed because whenever the tool head switches the action between the extruders, they stop at the front left point of the print. They are not performing the Z-hop and because they are hot they are disturbing the print at that point.
These are the settings that are currently set:
[![Print Settings in cura](https://i.sstatic.net/tXWta.jpg)](https://i.sstatic.net/tXWta.jpg)

The print with the disturbance:
[![Disturbed print](https://i.sstatic.net/7Dh69.jpg)](https://i.sstatic.net/7Dh69.jpg)

Sometimes the whole print is getting dragged to the extruders.

**Tags:** print-quality, abs, z-axis, dual-nozzle


---

## 1 answers

### Answer by username_1 on 2018-08-06. Score: 2

It appears as though you are using (or used) an old version of Cura. More recent releases allow you to insert G-code commands on changing the extruder. You could insert a Z-hop in these sections.

**Extruder End G-code**: First set the extruder in a relative mode, move up 2 mm, set absolute again:

```
G91
G1 Z2
G90

```

**Extruder Start G-code**: First set the extruder in a relative mode, move down 2 mm, set absolute again:

```
G91
G1 Z-2
G90

```

You could even do filament retractions to prevent oozing or stringing!

*Note that this assumes both hotends are on the same carriage!*

[![Cura printer extruder start and end code sections](https://i.sstatic.net/TqkUo.png)](https://i.sstatic.net/TqkUo.png)

An alternative you could try is to use a print server that is able to inject G-code scripts, an example is OctoPrint:

[![OctoPrint tool change start and end code sections](https://i.sstatic.net/Tgzn4.png)](https://i.sstatic.net/Tgzn4.png)


---

