<p>I am a newbie to the 3D printing world. Every night spending hours researching and troubleshooting. Recently though I am having a weird problem for which I can not figure out a solution. While printing it randomly skips a line or two (see attached photo). I have an Ender 3 Pro that is about a month old. I have installed a glass bed on it and I am using silk white pla. I am printing with the following settings:</p>
<ul>
<li>210 °C Nozzle temperature,</li>
<li>Bed at 60 °C,</li>
<li>Fan speed at 70 %,</li>
<li>Print speed at 45 mm/s,</li>
<li>layer height 0.2 mm with stock nozzle,</li>
<li>10 % cubic infill,</li>
<li>and plate adhesion type is skirt.</li>
</ul>
<p>Any help/advise would be appreciated.</p>
<p><a href="https://i.sstatic.net/qzYJm.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/qzYJm.jpg" alt="enter image description here" /></a></p>

CC BY-SA 4.0
2020-12-23T08:50:17.807Z
Looks like extrusion issues... PLA? Then 210 °C is rather hot.
Trish
CC BY-SA 4.0
2020-12-23T13:25:30.727Z
Are there any sounds like clicking or buzzing coming from the extruder? Is there a lot of dust building up in the extruder?
Andrew Morton
CC BY-SA 4.0
2020-12-23T13:54:25.203Z
Can you post your first layer of G-code? Does the rendering show these gaps?
Davo
CC BY-SA 4.0
2020-12-23T15:03:21.777Z
210 is fine for PLA, and hotter shouldn't cause this sort of issue. I normally print it at 210 and 220 on some filament with layers 0.2 mm or larger.
R.. GitHub STOP HELPING ICE
CC BY-SA 4.0
2020-12-23T15:04:58.893Z
Have you ever disassembled the bowden tube setup, especially at the hotend? Putting it back together wrong can cause this sort of issue.
R.. GitHub STOP HELPING ICE
CC BY-SA 4.0
2020-12-24T02:27:19.823Z
I didn't hear any unusual sounds asides from the motors itself. There is a bit of residue from the filament by the extruder. I will clean that up and see if that makes any difference. 

The render doesn't show these gaps. This happened only in the first 2 layers, after that it printed the rest fine.  

I haven't disassembled the bowden tube or the hot end. 

I suspect that it has something to do with the extruder. i just can't figure out what is it. As i am writing this, I just realized that the one thing i haven't checked is the extruder  gear. Thanks everyone for sharing and commenting
habib888
CC BY-SA 4.0
2021-01-11T22:03:25.613Z
Sorry for the late update. I am still struggling with this issue. The extruder gear was loose and was falling down, hence missing lines completely as the filament wasn't being fed. I tightened the screws and it resolved it for the most part. It is not as bad as the picture but it is still happening randomly. I have noticed though a few things. It only does it in the angle shown in the picture. Which makes me wonder if it has anything to do with the Y axis.
habib888
CC BY-SA 4.0
2021-01-11T22:03:55.437Z
another thing that I have noticed is a loud clicking sound. It happens randomly and when it happens the extruder gear moves back. Not sure if this is normal. I have recorded a video of it. Hopefully ill be able to upload it. It is 5 seconds and the click happens at 3rd sec.  I have cleaned the nozzle and ensured that the filament flows properly. If anyone else has experienced this or has any thoughts then I would really appreciate it. Thank you all for taking time to read and comment.
habib888
<print-quality><creality-ender-3><extrusion>
Ender 3 Pro - Randomly skip lines
habib888
# Ender 3 Pro - Randomly skip lines

(Asked by: username_0 on 2020-12-23)

I am a newbie to the 3D printing world. Every night spending hours researching and troubleshooting. Recently though I am having a weird problem for which I can not figure out a solution. While printing it randomly skips a line or two (see attached photo). I have an Ender 3 Pro that is about a month old. I have installed a glass bed on it and I am using silk white pla. I am printing with the following settings:

* 210 °C Nozzle temperature,
* Bed at 60 °C,
* Fan speed at 70 %,
* Print speed at 45 mm/s,
* layer height 0.2 mm with stock nozzle,
* 10 % cubic infill,
* and plate adhesion type is skirt.

Any help/advise would be appreciated.

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

**Tags:** print-quality, creality-ender-3, extrusion

> **Comments:**
> **username_1**: Looks like extrusion issues... PLA? Then 210 °C is rather hot.  
> **username_2**: Are there any sounds like clicking or buzzing coming from the extruder? Is there a lot of dust building up in the extruder?  
> **username_3**: Can you post your first layer of G-code? Does the rendering show these gaps?  
> **username_4**: 210 is fine for PLA, and hotter shouldn't cause this sort of issue. I normally print it at 210 and 220 on some filament with layers 0.2 mm or larger.  
> **username_4**: Have you ever disassembled the bowden tube setup, especially at the hotend? Putting it back together wrong can cause this sort of issue.  
> **username_0**: I didn't hear any unusual sounds asides from the motors itself. There is a bit of residue from the filament by the extruder. I will clean that up and see if that makes any difference.   The render doesn't show these gaps. This happened only in the first 2 layers, after that it printed the rest fine.    I haven't disassembled the bowden tube or the hot end.   I suspect that it has something to do with the extruder. i just can't figure out what is it. As i am writing this, I just realized that the one thing i haven't checked is the extruder  gear. Thanks everyone for sharing and commenting  
> **username_0**: Sorry for the late update. I am still struggling with this issue. The extruder gear was loose and was falling down, hence missing lines completely as the filament wasn't being fed. I tightened the screws and it resolved it for the most part. It is not as bad as the picture but it is still happening randomly. I have noticed though a few things. It only does it in the angle shown in the picture. Which makes me wonder if it has anything to do with the Y axis.  
> **username_0**: another thing that I have noticed is a loud clicking sound. It happens randomly and when it happens the extruder gear moves back. Not sure if this is normal. I have recorded a video of it. Hopefully ill be able to upload it. It is 5 seconds and the click happens at 3rd sec.  I have cleaned the nozzle and ensured that the filament flows properly. If anyone else has experienced this or has any thoughts then I would really appreciate it. Thank you all for taking time to read and comment.  

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## 0 answers

