<p>This looks very much like it is the seam between the outer perimeters that is placed one over the other. This can be solved by choosing a different Z-seam alignment. In Ultimatker Cura, the setting is called <code>Z-seam alignment</code> and should be set to <code>random</code> for cylindrical items.</p>

CC BY-SA 4.0
2019-04-06T22:55:20.653Z
Yes this is the seam (start/end of the outer wall perimeter), basically this printer is not calibrated correctly as this effect should be much less observable. Could be the filament is not available in time when the perimeter starts.
0scar
CC BY-SA 4.0
2019-04-06T23:47:20.640Z
Thank you for this information. I had no idea what this parameter was for. But it is likely there are also some calibration problem, as it was a printer I received in kit. What do you have in mind to fix the calibration problem, aside that probably I should tighten a bit more the belts?
Emile D.
CC BY-SA 4.0
2019-04-08T15:24:21.573Z
Is this the same as setting to "spiralize" , at least for cylinders?
Carl Witthoft
CC BY-SA 4.0
2019-04-08T15:25:28.713Z
I agree with Oscar that the general inconsistency in the wall of the upper object (in the photo) suggests problems with extrusion and/or excess backlash.
Carl Witthoft
CC BY-SA 4.0
2019-04-08T16:21:06.393Z
@CarlWitthoft no, spiralize is the vase mode.
Trish
CC BY-SA 4.0
2019-04-06T20:36:54.470Z
2019-04-06T20:36:54.470Z
Trish
<p>Whenever I print, I tend to have a small dent that appears on several of my prints, that are not in the original design. These are not following the layer orientation. </p>

<p>As far as I notice, nothing blocks the extruder of my prusa-i3. I print with PLA, so not a material where I would expect weird behaviour.</p>

<p><a href="https://i.sstatic.net/cZADy.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/cZADy.png" alt="Dent problem image"></a></p>

<p>What could cause that problem?</p>

CC BY-SA 4.0
2019-04-06T17:43:09.953Z
what is the model?
Trish
CC BY-SA 4.0
2019-04-06T18:03:36.433Z
@Trish: the model is one of the russian doll maze, available here: https://www.thingiverse.com/thing:2410748
Emile D.
CC BY-SA 4.0
2019-04-06T18:11:18.520Z
In case the question leads to the size of the wall, I don't think it is the issue, since it is always at least 3 nozzle large.
Emile D.
CC BY-SA 4.0
2019-04-06T18:12:50.010Z
Looks like some kind of backlash issue with your printer. One way to know for sure is to print a part that has this issue, and then rotate the part in data and reprint. If the 'dent' stays in the same place relative to the bed/printer, then it's definitely a mechanical issue and not a data issue.
BobT
CC BY-SA 4.0
2019-04-06T18:54:49.633Z
Also, looking at the rest of the print, aren't the side supposed to be smooth? In the thingiverse model, it appears to be so. I'd think you may need to tighten things up a little bit. Also, not sure how the nibs which run the maze are supposed to be supported during print or if there's enough overhang (or angle of the nib while printing) to allow it to print correctly at the top. If you have support turned on, could this be causing the issue where the nib is at?
Pᴀᴜʟsᴛᴇʀ2
CC BY-SA 4.0
2019-04-06T23:38:19.610Z
@Paulster2 Yes, the side are supposed to be smooth. I think that you are right, I should tighten a bit the belts. But I don't think it is a problem of overhang.
Emile D.
<print-quality><prusa-i3>
Small dent problem
Emile D.
# Small dent problem

(Asked by: username_0 on 2019-04-06)

Whenever I print, I tend to have a small dent that appears on several of my prints, that are not in the original design. These are not following the layer orientation.

As far as I notice, nothing blocks the extruder of my prusa-i3. I print with PLA, so not a material where I would expect weird behaviour.

[![Dent problem image](https://i.sstatic.net/cZADy.png)](https://i.sstatic.net/cZADy.png)

What could cause that problem?

**Tags:** print-quality, prusa-i3
> **Comments:**
> **username_1**: what is the model?  
> **username_0**: @Trish: the model is one of the russian doll maze, available here: https://www.thingiverse.com/thing:2410748  
> **username_0**: In case the question leads to the size of the wall, I don't think it is the issue, since it is always at least 3 nozzle large.  
> **username_2**: Looks like some kind of backlash issue with your printer. One way to know for sure is to print a part that has this issue, and then rotate the part in data and reprint. If the 'dent' stays in the same place relative to the bed/printer, then it's definitely a mechanical issue and not a data issue.  
> **username_3**: Also, looking at the rest of the print, aren't the side supposed to be smooth? In the thingiverse model, it appears to be so. I'd think you may need to tighten things up a little bit. Also, not sure how the nibs which run the maze are supposed to be supported during print or if there's enough overhang (or angle of the nib while printing) to allow it to print correctly at the top. If you have support turned on, could this be causing the issue where the nib is at?  
> **username_0**: @Paulster2 Yes, the side are supposed to be smooth. I think that you are right, I should tighten a bit the belts. But I don't think it is a problem of overhang.  

---

## 1 answers

### Answer by username_1 on 2019-04-06. Score: 4

This looks very much like it is the seam between the outer perimeters that is placed one over the other. This can be solved by choosing a different Z-seam alignment. In Ultimatker Cura, the setting is called `Z-seam alignment` and should be set to `random` for cylindrical items.

> **Comments:**
> **username_4**: Yes this is the seam (start/end of the outer wall perimeter), basically this printer is not calibrated correctly as this effect should be much less observable. Could be the filament is not available in time when the perimeter starts.  
> **username_0**: Thank you for this information. I had no idea what this parameter was for. But it is likely there are also some calibration problem, as it was a printer I received in kit. What do you have in mind to fix the calibration problem, aside that probably I should tighten a bit more the belts?  
> **username_5**: Is this the same as setting to "spiralize" , at least for cylinders?  
> **username_5**: I agree with Oscar that the general inconsistency in the wall of the upper object (in the photo) suggests problems with extrusion and/or excess backlash.  
> **username_1**: @CarlWitthoft no, spiralize is the vase mode.  

---

