<p>It is always very difficult to debug a printer remotely, but here's my best shot.  I may be <em>totally</em> wrong though!</p>

<p>Zooming-in your picture seems to show like little bumps (inwards or outwards) that offset the extrusion in the XY plane.</p>

<p><a href="https://i.sstatic.net/AbszF.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/AbszF.jpg" alt="zoomed-in picture"></a></p>

<p>The fact the bumps occur on both the X and Y axis, and both inwards and outwards, and that the patterns are not fully regular make me think <strong>the problem could be as simple as the new printing head having some play, and some combination of forces waking bumping it momentarily off its intended position</strong>.</p>

<blockquote>
  <p>Any ideas or suggestions as to what to check next?</p>
</blockquote>

<p>Check for play.</p>

<p>Play which is due to a static feature (like a loose bolt, a clamp not holding firmly enugh or a cracked heat break) can be usually be detected with the printer switched off, by holding the nozzle between your fingers and shacking it gently.</p>

<p>Play that is dynamic in nature (for example a roller with an irregular diameter or screwed parts becoming loose only when hot) can be more tricky to detect.  The procedure is the same, but tou may have to heat the extruder (and use gloves, doh!) or to repeat it at different positions on the X and Y axis.</p>

CC BY-SA 3.0
2018-02-17T00:04:53.827Z
2018-02-17T00:04:53.827Z
mac
<p>I am noticing strange print patterns ever since I upgraded to the Prusa multi material print head.  The patterns are consistent printing upwards but inconsistent amongst each face.  </p>

<p><img src="https://photos-3.dropbox.com/t/2/AAAej5iN5jXAi17ybiFOElZpql5VBmm37Kdrnr3dOFKZdA/12/227782943/jpeg/32x32/1/_/1/2/20180207_142204.jpg/EJjFva4BGAogBygH/nMy1fd3j77dWsnlqh9E41sufMPEJbLXjjCVWG8GaitA?size=1280x960&amp;size_mode=3" alt="photo1"></p>

<p><img src="https://photos-5.dropbox.com/t/2/AAC4BscL_WbA7MucD-SaqfwsQYIQFW3SUyOSmwoeuB17Sw/12/227782943/jpeg/32x32/1/_/1/2/20180207_142129.jpg/EJjFva4BGAogBygH/ttCiuVeHoJaboXCtZbzlX70Qtrs3JLLQJIgNkmn3h30?size=1280x960&amp;size_mode=3" alt="photo2"></p>

<p>I am using original Prusa PLA filament, and have tried to different extruder temperature settings (200C, 205C, 210C, and 215C) but they all have similar patterns.  A different color and roll of Prusa filament is doing the same thing.</p>

<p>Any ideas or suggestions as to what to check next?  Thanks for any input!</p>

CC BY-SA 3.0
2018-02-22T18:36:05.260Z
Your pictures are no longer available.
300D7309EF17
CC BY-SA 3.0
2018-03-25T12:04:04.143Z
The photos have disappeared again. Try posting them using the image button in the editor rather than hosting them externally (on dropbox, etc.)
Greenonline
<prusa-i3><multi-material>
Has anyone encountered this type of strange print patterns?
user9868
# Has anyone encountered this type of strange print patterns?

(Asked by: username_0 on 2018-02-16)

I am noticing strange print patterns ever since I upgraded to the Prusa multi material print head. The patterns are consistent printing upwards but inconsistent amongst each face.

![photo1](https://photos-3.dropbox.com/t/2/AAAej5iN5jXAi17ybiFOElZpql5VBmm37Kdrnr3dOFKZdA/12/227782943/jpeg/32x32/1/_/1/2/20180207_142204.jpg/EJjFva4BGAogBygH/nMy1fd3j77dWsnlqh9E41sufMPEJbLXjjCVWG8GaitA?size=1280x960&size_mode=3)

![photo2](https://photos-5.dropbox.com/t/2/AAC4BscL_WbA7MucD-SaqfwsQYIQFW3SUyOSmwoeuB17Sw/12/227782943/jpeg/32x32/1/_/1/2/20180207_142129.jpg/EJjFva4BGAogBygH/ttCiuVeHoJaboXCtZbzlX70Qtrs3JLLQJIgNkmn3h30?size=1280x960&size_mode=3)

I am using original Prusa PLA filament, and have tried to different extruder temperature settings (200C, 205C, 210C, and 215C) but they all have similar patterns. A different color and roll of Prusa filament is doing the same thing.

Any ideas or suggestions as to what to check next? Thanks for any input!

**Tags:** prusa-i3, multi-material

> **Comments:**
> **username_1**: Your pictures are no longer available.  
> **username_2**: The photos have disappeared again. Try posting them using the image button in the editor rather than hosting them externally (on dropbox, etc.)  

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## 1 answers

### Answer by username_3 on 2018-02-17. Score: 2

It is always very difficult to debug a printer remotely, but here's my best shot. I may be *totally* wrong though!

Zooming-in your picture seems to show like little bumps (inwards or outwards) that offset the extrusion in the XY plane.

[![zoomed-in picture](https://i.sstatic.net/AbszF.jpg)](https://i.sstatic.net/AbszF.jpg)

The fact the bumps occur on both the X and Y axis, and both inwards and outwards, and that the patterns are not fully regular make me think **the problem could be as simple as the new printing head having some play, and some combination of forces waking bumping it momentarily off its intended position**.

> Any ideas or suggestions as to what to check next?

Check for play.

Play which is due to a static feature (like a loose bolt, a clamp not holding firmly enugh or a cracked heat break) can be usually be detected with the printer switched off, by holding the nozzle between your fingers and shacking it gently.

Play that is dynamic in nature (for example a roller with an irregular diameter or screwed parts becoming loose only when hot) can be more tricky to detect. The procedure is the same, but tou may have to heat the extruder (and use gloves, doh!) or to repeat it at different positions on the X and Y axis.


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