<p>It looks like you are not extruding at the correct rate. I would check your slicer settings for nozzle and filament size. Also check and calibrate for your filament diameter.</p>

<p>It looks like you could be getting better adhesion too. Lulzbot recommends a 110C bed temperature. That might help. (lulzbot.com/store/filament/abs under specifications)</p>

<p>These are some good resources to troubleshoot prints, </p>

<p><a href="http://reprap.org/wiki/Print_Troubleshooting_Pictorial_Guide#Insufficient_Material" rel="nofollow noreferrer">RepRap</a></p>

<p><a href="https://all3dp.com/common-3d-printing-problems-3d-printer-troubleshooting-guide/" rel="nofollow noreferrer">All3DP</a></p>

<p><a href="https://www.simplify3d.com/support/print-quality-troubleshooting/#extruding-too-much-plastic" rel="nofollow noreferrer">Simplify3D</a></p>

CC BY-SA 3.0
2016-10-29T21:56:07.180Z
[Simplify3D](https://www.simplify3d.com/support/print-quality-troubleshooting/#extruding-too-much-plastic)
jmb2341
CC BY-SA 3.0
2016-10-29T21:55:58.050Z
2016-11-01T14:26:55.830Z
2016-11-01T14:26:55.830Z
jmb2341
<p>As Jmb2341 suggests, this <em>over extrusion</em> could be due to an excessive feed rate. </p>

<p>However, I would also like to add the possibility of your Z-height during the <em>first layer</em> being too close. For instance, if your <em>first layer height</em> is set to <strong>0.4mm</strong>, but your print head actually moves as close as <strong>0.2mm</strong> from the bed, there will be twice as much filament extruded than what it is actually room for below the nozzle. This, in turn, will <em>appear</em> like over extrusion, while the issue actually is your Z-leveling/height.</p>

<p>In general, unless you are using a <em>raft</em>, the amount of first layer over extrusion will often have to be balanced with the prints ability to stick to the bed. In other words, over extrusion during the first layer improves print stickiness, so that close bed leveling gives sticky prints but first layer over extrusion; while, distant bed leveling gives loose prints with more accurate first layer extrusion. </p>

<p>If you are wondering whether what you are seeing is over extrusion due to excessive feed rate or too close bed levelling, then you should try to inspect the extrusion of the <em>top layer</em> of some of your prints: If the top layer looks fine, your bed is leveled too close; however, if the top layer is over extruded as well, then your feed rate is too high.</p>

<p>Good luck!</p>

CC BY-SA 3.0
2016-11-01T14:33:28.100Z
You're right about the nozzle standoff. If it's a Z-height issue, then you'll see "over extrusion" throughout each layer. Unfortunately the photo doesn't tell us if that's the issue. However it is important to note that, if you can, specify the first layer (or few) to over extrude with ABS, you can reduce the chance of warping. The more surface area, the better with ABS.
tbm0115
CC BY-SA 3.0
2016-10-30T15:56:58.950Z
2016-11-01T15:14:49.603Z
2016-11-01T15:14:49.603Z
Tormod Haugene
<p>Two things come to mind. First it is the first few layers. You could have the head Smashing into the print bed. Causing a massive build up of plastic the first few layers. And or you have over extrusion.</p>

<ol>
<li><p>Take a piece of paper. you want the distance from the head and the
bed to be that width. Just enough friction to feel a light drag. </p></li>
<li><p>After that verify that your first layer extrusion multiplier is
under 1.5. </p></li>
<li><p>Make sure you are extruding the correct amount. Take a ruler.
Mark out 100mm. Have it extrude 100mm. Correct feed rates
accordingly. </p></li>
<li><p>Next check plastic diameter by taking the average over 10 samples
over a meter of plastic. Enter accordingly.</p></li>
<li><p>Then last you might have temp a bit high. Drop it a few degrees. Not a huge factor. </p></li>
</ol>

CC BY-SA 3.0
2016-12-13T21:50:32.220Z
2016-12-13T21:50:32.220Z
MakerModder
<p>I'm a novice in 3D printing. I have a <a href="https://en.wikipedia.org/wiki/Aleph_Objects#LulzBot" rel="noreferrer">Lulzbot Kittaz 3D printer</a> with a hexagonal hot end of 0.35&nbsp;mm. I have printed a test subject, and while I was printing I encountered this extrusion problem. I'm using ABS with 230&nbsp;°C hot end temperature and 85&nbsp;°C bed temperature. What kind of problem is this and how should I rectify it?</p>

<p>I took this photo when the printer printed the first layer:</p>

<p><a href="https://i.sstatic.net/HtTv4.jpg" rel="noreferrer"><img src="https://i.sstatic.net/HtTv4.jpg" alt="First layer of print"></a></p>

<print-quality><extrusion>
Which type of extrusion problem?
Veda
# Which type of extrusion problem?

(Asked by: username_0 on 2016-10-28)

I'm a novice in 3D printing. I have a [Lulzbot Kittaz 3D printer](https://en.wikipedia.org/wiki/Aleph_Objects#LulzBot) with a hexagonal hot end of 0.35 mm. I have printed a test subject, and while I was printing I encountered this extrusion problem. I'm using ABS with 230 °C hot end temperature and 85 °C bed temperature. What kind of problem is this and how should I rectify it?

I took this photo when the printer printed the first layer:

[![First layer of print](https://i.sstatic.net/HtTv4.jpg)](https://i.sstatic.net/HtTv4.jpg)

**Tags:** print-quality, extrusion


---

## 3 answers

### Answer by username_1 on 2016-10-29. Score: 4

It looks like you are not extruding at the correct rate. I would check your slicer settings for nozzle and filament size. Also check and calibrate for your filament diameter.

It looks like you could be getting better adhesion too. Lulzbot recommends a 110C bed temperature. That might help. (lulzbot.com/store/filament/abs under specifications)

These are some good resources to troubleshoot prints,

[RepRap](http://reprap.org/wiki/Print_Troubleshooting_Pictorial_Guide#Insufficient_Material)

[All3DP](https://all3dp.com/common-3d-printing-problems-3d-printer-troubleshooting-guide/)

[Simplify3D](https://www.simplify3d.com/support/print-quality-troubleshooting/#extruding-too-much-plastic)

> **Comments:**
> **username_1**: [Simplify3D](https://www.simplify3d.com/support/print-quality-troubleshooting/#extruding-too-much-plastic)  

---

### Answer by username_2 on 2016-10-30. Score: 3

As username_1 suggests, this *over extrusion* could be due to an excessive feed rate.

However, I would also like to add the possibility of your Z-height during the *first layer* being too close. For instance, if your *first layer height* is set to **0.4mm**, but your print head actually moves as close as **0.2mm** from the bed, there will be twice as much filament extruded than what it is actually room for below the nozzle. This, in turn, will *appear* like over extrusion, while the issue actually is your Z-leveling/height.

In general, unless you are using a *raft*, the amount of first layer over extrusion will often have to be balanced with the prints ability to stick to the bed. In other words, over extrusion during the first layer improves print stickiness, so that close bed leveling gives sticky prints but first layer over extrusion; while, distant bed leveling gives loose prints with more accurate first layer extrusion.

If you are wondering whether what you are seeing is over extrusion due to excessive feed rate or too close bed levelling, then you should try to inspect the extrusion of the *top layer* of some of your prints: If the top layer looks fine, your bed is leveled too close; however, if the top layer is over extruded as well, then your feed rate is too high.

Good luck!

> **Comments:**
> **username_3**: You're right about the nozzle standoff. If it's a Z-height issue, then you'll see "over extrusion" throughout each layer. Unfortunately the photo doesn't tell us if that's the issue. However it is important to note that, if you can, specify the first layer (or few) to over extrude with ABS, you can reduce the chance of warping. The more surface area, the better with ABS.  

---

### Answer by username_4 on 2016-12-13. Score: 1

Two things come to mind. First it is the first few layers. You could have the head Smashing into the print bed. Causing a massive build up of plastic the first few layers. And or you have over extrusion.

1. Take a piece of paper. you want the distance from the head and the
   bed to be that width. Just enough friction to feel a light drag.
2. After that verify that your first layer extrusion multiplier is
   under 1.5.
3. Make sure you are extruding the correct amount. Take a ruler.
   Mark out 100mm. Have it extrude 100mm. Correct feed rates
   accordingly.
4. Next check plastic diameter by taking the average over 10 samples
   over a meter of plastic. Enter accordingly.
5. Then last you might have temp a bit high. Drop it a few degrees. Not a huge factor.


---

