<p>After checking several places online, I finally got an answer in a Discord chat.</p>
<p>The solution was to turn off the <strong>Power-loss recovery</strong> setting on the printer itself.</p>
<p>After that was done, the print came out beautifully.</p>

CC BY-SA 4.0
2022-09-02T00:11:51.857Z
I just thought of that when I saw this question bumped and came here just to suggest you check that. Yep, power-loss recovery is the most horrible anti-feature on these printers. It's designed to stall the printer for a long time *after unretracting but before printing* by performing the (long, blocking) SD card write at the first print (extrusion+motion) move of a new layer. It's just horribly misdesigned and useless and needs to be turned off.
R.. GitHub STOP HELPING ICE
CC BY-SA 4.0
2022-09-02T01:07:27.683Z
@R..GitHubSTOPHELPINGICE Very true. Just another example of a great idea that was poorly executed.
agarza
CC BY-SA 4.0
2022-09-02T02:03:03.797Z
Yep. Executing the idea well is rather hard though. To actually work well it'd need something like a small UPS to power the printer minus bed heater until next layer change, then pause, park the head (so the hotend doesn't sit on the print and ruin it), and record state for recovery. It also needs a printer that homes at max Z, not min Z, so that Z can be re-homed without destroying the print, and that has very good homing reproducibility in X and Y. And it needs a bed surface that doesn't release the print on cooling. And.....
R.. GitHub STOP HELPING ICE
CC BY-SA 4.0
2022-09-01T19:48:15.620Z
2022-09-01T19:48:15.620Z
agarza
<p>Looks like <strong>Retract at layer change</strong> is causing this. Disable that and see. This will help you to improve the quality a lot.</p>
<p>It will be under retraction settings:</p>
<p><a href="https://i.sstatic.net/tdYOm.png" rel="nofollow noreferrer" title="Screenshot of retraction settings"><img src="https://i.sstatic.net/tdYOm.png" alt="Screenshot of retraction settings" title="Screenshot of retraction settings" /></a></p>

CC BY-SA 4.0
2022-08-19T16:52:17.767Z
After disabling "Retract on layer change", the problem still exists.
agarza
CC BY-SA 4.0
2022-08-19T14:26:48.880Z
2022-08-20T04:55:39.763Z
2022-08-20T04:55:39.763Z
eskeyaar
<p>I recently purchased a spool of PETG to try working with it. I have managed to dial in most of the settings in Prusaslicer but one, in particular, is giving me a problem. As seen in the photo, the clip I printed has extra extrusion on the inside and outside. I have noticed that the nozzle will pause at the seam for about 5 secs before continuing. (The bottom is not Elephant's foot, I just didn't clean off all the brim)</p>
<p><a href="https://i.sstatic.net/WlK7I.jpg" rel="nofollow noreferrer" title="Photo of the front and back of a 3D printed clip showing extra extrusion"><img src="https://i.sstatic.net/WlK7I.jpg" alt="Photo of the front and back of a 3D printed clip showing extra extrusion" title="Photo of the front and back of a 3D printed clip showing extra extrusion" /></a></p>
<p>I positioned the seam on the inside of the model. I know that the extra extrusion is caused by the seam but why would it also appear on the outside of the model?</p>
<p><a href="https://i.sstatic.net/3RwLE.png" rel="nofollow noreferrer" title="Screenshot of the Prusaslicer Preview of the model showing the seam and retractions"><img src="https://i.sstatic.net/3RwLE.png" alt="Screenshot of the Prusaslicer Preview of the model showing the seam and retractions" title="Screenshot of the Prusaslicer Preview of the model showing the seam and retractions" /></a></p>
<p>I have printed the same clip in PLA without any printing errors. What setting within Prusaslicer needs to change so I can get rid of the extra plastic on the inside and outside of the print?</p>
<p>[I don't know what relevant print settings are needed to solve this problem, but will edit the question when I get some guidance.]</p>

CC BY-SA 4.0
2022-08-19T03:11:14.987Z
It's very likely just wet. PETG does awful things on resuming extrusion after retract/travel when it's wet. Unless it's been activelly dried in the past week and stored in a sealed container with fresh/dried dessicant, PETG is wet.
R.. GitHub STOP HELPING ICE
CC BY-SA 4.0
2022-08-19T04:34:22.340Z
Funny enough, it has been in a filament dryer for the past week.
agarza
CC BY-SA 4.0
2022-08-19T09:44:00.337Z
It depends how good the filament dryer is. If it's completely closed and no air can get in/out, the humidity stays inside.
FarO
CC BY-SA 4.0
2022-08-19T18:44:53.247Z
What @FarO said. There are plenty of bad filament dryers that don't actually work.
R.. GitHub STOP HELPING ICE
CC BY-SA 4.0
2022-09-01T19:51:04.907Z
While the idea of "wet" filament is possible, it would manifest itself over the whole model not just in one area. As seen in the photo, the front and sides of the print are fine; the area where the seam occurs is noticeably bad. But another solution was found.
agarza
<print-quality><petg><prusaslicer>
Extra extrusion at seam of print with PETG
agarza
# Extra extrusion at seam of print with PETG

(Asked by: username_0 on 2022-08-18)

I recently purchased a spool of PETG to try working with it. I have managed to dial in most of the settings in Prusaslicer but one, in particular, is giving me a problem. As seen in the photo, the clip I printed has extra extrusion on the inside and outside. I have noticed that the nozzle will pause at the seam for about 5 secs before continuing. (The bottom is not Elephant's foot, I just didn't clean off all the brim)

[![Photo of the front and back of a 3D printed clip showing extra extrusion](https://i.sstatic.net/WlK7I.jpg "Photo of the front and back of a 3D printed clip showing extra extrusion")](https://i.sstatic.net/WlK7I.jpg "Photo of the front and back of a 3D printed clip showing extra extrusion")

I positioned the seam on the inside of the model. I know that the extra extrusion is caused by the seam but why would it also appear on the outside of the model?

[![Screenshot of the Prusaslicer Preview of the model showing the seam and retractions](https://i.sstatic.net/3RwLE.png "Screenshot of the Prusaslicer Preview of the model showing the seam and retractions")](https://i.sstatic.net/3RwLE.png "Screenshot of the Prusaslicer Preview of the model showing the seam and retractions")

I have printed the same clip in PLA without any printing errors. What setting within Prusaslicer needs to change so I can get rid of the extra plastic on the inside and outside of the print?

[I don't know what relevant print settings are needed to solve this problem, but will edit the question when I get some guidance.]

**Tags:** print-quality, petg, prusaslicer
> **Comments:**
> **username_1**: It's very likely just wet. PETG does awful things on resuming extrusion after retract/travel when it's wet. Unless it's been activelly dried in the past week and stored in a sealed container with fresh/dried dessicant, PETG is wet.  
> **username_0**: Funny enough, it has been in a filament dryer for the past week.  
> **username_2**: It depends how good the filament dryer is. If it's completely closed and no air can get in/out, the humidity stays inside.  
> **username_1**: What @FarO said. There are plenty of bad filament dryers that don't actually work.  
> **username_0**: While the idea of "wet" filament is possible, it would manifest itself over the whole model not just in one area. As seen in the photo, the front and sides of the print are fine; the area where the seam occurs is noticeably bad. But another solution was found.  

---

## 2 answers

### Answer by username_0 on 2022-09-01. Score: 3 | Accepted answer

After checking several places online, I finally got an answer in a Discord chat.

The solution was to turn off the **Power-loss recovery** setting on the printer itself.

After that was done, the print came out beautifully.

> **Comments:**
> **username_1**: I just thought of that when I saw this question bumped and came here just to suggest you check that. Yep, power-loss recovery is the most horrible anti-feature on these printers. It's designed to stall the printer for a long time *after unretracting but before printing* by performing the (long, blocking) SD card write at the first print (extrusion+motion) move of a new layer. It's just horribly misdesigned and useless and needs to be turned off.  
> **username_0**: @R..GitHubSTOPHELPINGICE Very true. Just another example of a great idea that was poorly executed.  
> **username_1**: Yep. Executing the idea well is rather hard though. To actually work well it'd need something like a small UPS to power the printer minus bed heater until next layer change, then pause, park the head (so the hotend doesn't sit on the print and ruin it), and record state for recovery. It also needs a printer that homes at max Z, not min Z, so that Z can be re-homed without destroying the print, and that has very good homing reproducibility in X and Y. And it needs a bed surface that doesn't release the print on cooling. And.....  

---

### Answer by username_3 on 2022-08-19. Score: 0

Looks like **Retract at layer change** is causing this. Disable that and see. This will help you to improve the quality a lot.

It will be under retraction settings:

[![Screenshot of retraction settings](https://i.sstatic.net/tdYOm.png "Screenshot of retraction settings")](https://i.sstatic.net/tdYOm.png "Screenshot of retraction settings")

> **Comments:**
> **username_0**: After disabling "Retract on layer change", the problem still exists.  

---

