<p>Looks like curling from to much being extruded and no cooling I had the same problem added part cooling and problem was gone </p>

CC BY-SA 3.0
2018-03-23T08:16:22.230Z
You address the part cooling part, but you also suggest over-extrusion. Maybe that aspect would be better as a second point. Can you elaborate on part cooling a little to make the answer a little more comprehensive?
Sean Houlihane
CC BY-SA 3.0
2018-03-22T02:36:18.060Z
2018-03-22T02:36:18.060Z
Killingyou1026
<p>The lines along the length of the boat also appear to be wobbling, can you confirm this? Have you used this material before? The layers should look straight and equal.
<a href="https://i.sstatic.net/PvV5g.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/PvV5g.png" alt="enter image description here"></a></p>

<p>I have 2 candidates:
If the lines indeed wobble it may be over extrusion. The excess material pushing the extruded line over the edge. (check the diameter of the filament with a caliper and adjust the extrusion rate if needed)</p>

<p>Or it can be shrinking. 60% infill is quite high. You could try 20 or 30% (less material and more air => less distortion), or adjusting cooling.</p>

<p>Hope it helps, good luck!  </p>

CC BY-SA 3.0
2018-03-18T22:22:44.380Z
2018-03-18T22:22:44.380Z
Smitje
<p>I am attempting to print the Benchy boat but every attempt so far has been unsuccessful. The print has a sort of slope/blob on the nose of the boat, which emerges after the first 30 layers.</p>

<p><a href="https://i.sstatic.net/vx2cM.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/vx2cM.jpg" alt="defect"></a></p>

<p>Here you can see the front of the boat already arching up:</p>

<p><a href="https://i.sstatic.net/q9Z6A.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/q9Z6A.jpg" alt="defect 2"></a></p>

<p>I have tried decreasing speed to 40 mm/s but the issue remains.</p>

<p><strong>Printer</strong>: Geetech Prusa I3 Pro B</p>

<p>XY Accelleration: 1000 mm/s<sup>2</sup></p>

<p>XY Jerk: 20 mm/s</p>

<p>Retraction Accelleration: 2000 mm/s<sup>2</sup></p>

<p>Extruder Jerk: 5 mm/s</p>

<p>Printing Speed: 50 mm/s</p>

<p>Travel Speed: 120 mm/s</p>

<p>Layer Height: 0.1 mm</p>

<p>Infill: 60% (Lines)</p>

<p>Material: PLA, 200 °C, 1.75mm filament, retraction enabled.</p>

CC BY-SA 3.0
2018-03-17T20:14:16.283Z
A picture would help tremendously in diagnosing the problem! :)
mac
CC BY-SA 3.0
2018-03-18T08:22:33.230Z
Also information regarding your printer, slicer, and type/brand of filament would be useful.
NomadMaker
CC BY-SA 3.0
2018-03-18T10:21:25.410Z
@NomadMaker Thank you, i have edited the question as you suggested. I was in a bit of a rush yesterday.
Riccardo Fagiolo
CC BY-SA 3.0
2018-03-22T08:48:32.843Z
You don't mention cooling, could you elaborate on that in your question? It looks like you are not cooling the deposited filament enough so that it curls up.
0scar
CC BY-SA 3.0
2018-03-28T10:24:22.533Z
200C could be way too hot depending on the exact filament and the cooling setup. I'd try 185C and work up from there.
Iain Ballard
<prusa-i3><extrusion><speed>
What setting is this defect caused by?
Riccardo Fagiolo
# What setting is this defect caused by?

(Asked by: username_0 on 2018-03-17)

I am attempting to print the Benchy boat but every attempt so far has been unsuccessful. The print has a sort of slope/blob on the nose of the boat, which emerges after the first 30 layers.

[![defect](https://i.sstatic.net/vx2cM.jpg)](https://i.sstatic.net/vx2cM.jpg)

Here you can see the front of the boat already arching up:

[![defect 2](https://i.sstatic.net/q9Z6A.jpg)](https://i.sstatic.net/q9Z6A.jpg)

I have tried decreasing speed to 40 mm/s but the issue remains.

**Printer**: Geetech Prusa I3 Pro B

XY Accelleration: 1000 mm/s2

XY Jerk: 20 mm/s

Retraction Accelleration: 2000 mm/s2

Extruder Jerk: 5 mm/s

Printing Speed: 50 mm/s

Travel Speed: 120 mm/s

Layer Height: 0.1 mm

Infill: 60% (Lines)

Material: PLA, 200 °C, 1.75mm filament, retraction enabled.

**Tags:** prusa-i3, extrusion, speed

> **Comments:**
> **username_1**: A picture would help tremendously in diagnosing the problem! :)  
> **username_2**: Also information regarding your printer, slicer, and type/brand of filament would be useful.  
> **username_0**: @username_2 Thank you, i have edited the question as you suggested. I was in a bit of a rush yesterday.  
> **username_3**: You don't mention cooling, could you elaborate on that in your question? It looks like you are not cooling the deposited filament enough so that it curls up.  
> **username_4**: 200C could be way too hot depending on the exact filament and the cooling setup. I'd try 185C and work up from there.  

---

## 2 answers

### Answer by username_5 on 2018-03-22. Score: 2

Looks like curling from to much being extruded and no cooling I had the same problem added part cooling and problem was gone

> **Comments:**
> **username_6**: You address the part cooling part, but you also suggest over-extrusion. Maybe that aspect would be better as a second point. Can you elaborate on part cooling a little to make the answer a little more comprehensive?  

---

### Answer by username_7 on 2018-03-18. Score: 0

The lines along the length of the boat also appear to be wobbling, can you confirm this? Have you used this material before? The layers should look straight and equal.
[![enter image description here](https://i.sstatic.net/PvV5g.png)](https://i.sstatic.net/PvV5g.png)

I have 2 candidates:
If the lines indeed wobble it may be over extrusion. The excess material pushing the extruded line over the edge. (check the diameter of the filament with a caliper and adjust the extrusion rate if needed)

Or it can be shrinking. 60% infill is quite high. You could try 20 or 30% (less material and more air => less distortion), or adjusting cooling.

Hope it helps, good luck!


---

