Slicer line width vs. extrusion multiplier for layer adhesion?

Clash Royale CLAN TAG#URR8PPP

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My question would like to address what would be better for adhesion and general quality and possibly strength: either increase the slicer line width option or increase the slicer extrusion multiplier for layer to layer adhesion?

---

This question has a relation to "Why is it conventional to set line width > nozzle diameter?". This answer on that question addresses a phenomenon called die swell to explain that the extrusion width is generally larger than the nozzle diameter even if the line width in the slicer is set to the nozzle diameter. Basically, increasing the line width increases the extrusion multiplier, so why not set that directly?

slicing extrusion nozzle

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edited 36 mins ago

asked 3 hours ago

0scar

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add a comment | 

up vote
2
down vote

favorite

My question would like to address what would be better for adhesion and general quality and possibly strength: either increase the slicer line width option or increase the slicer extrusion multiplier for layer to layer adhesion?

---

This question has a relation to "Why is it conventional to set line width > nozzle diameter?". This answer on that question addresses a phenomenon called die swell to explain that the extrusion width is generally larger than the nozzle diameter even if the line width in the slicer is set to the nozzle diameter. Basically, increasing the line width increases the extrusion multiplier, so why not set that directly?

slicing extrusion nozzle

share|improve this question

edited 36 mins ago

asked 3 hours ago

0scar

5,2811835

add a comment | 

up vote
2
down vote

favorite

up vote
2
down vote

favorite

My question would like to address what would be better for adhesion and general quality and possibly strength: either increase the slicer line width option or increase the slicer extrusion multiplier for layer to layer adhesion?

---

This question has a relation to "Why is it conventional to set line width > nozzle diameter?". This answer on that question addresses a phenomenon called die swell to explain that the extrusion width is generally larger than the nozzle diameter even if the line width in the slicer is set to the nozzle diameter. Basically, increasing the line width increases the extrusion multiplier, so why not set that directly?

slicing extrusion nozzle

share|improve this question

edited 36 mins ago

asked 3 hours ago

0scar

5,2811835

My question would like to address what would be better for adhesion and general quality and possibly strength: either increase the slicer line width option or increase the slicer extrusion multiplier for layer to layer adhesion?

---

This question has a relation to "Why is it conventional to set line width > nozzle diameter?". This answer on that question addresses a phenomenon called die swell to explain that the extrusion width is generally larger than the nozzle diameter even if the line width in the slicer is set to the nozzle diameter. Basically, increasing the line width increases the extrusion multiplier, so why not set that directly?

slicing extrusion nozzle

slicing extrusion nozzle

share|improve this question

edited 36 mins ago

asked 3 hours ago

0scar

5,2811835

share|improve this question

edited 36 mins ago

asked 3 hours ago

0scar

5,2811835

share|improve this question

share|improve this question

edited 36 mins ago

edited 36 mins ago

edited 36 mins ago

asked 3 hours ago

0scar

5,2811835

asked 3 hours ago

0scar

5,2811835

asked 3 hours ago

0scar

5,2811835

5,2811835

add a comment | 

add a comment | 

1 Answer
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up vote
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Generally speaking, both settings result in the same¹: The feed rate of the filament gets adjusted. Either you set a general multiplier, or you demand a wider line which does make it set a higher multiplier hidden in the software.

^{1 - if you don't look at any other factor that is!}

But...

There is always a but, and this one is big:

While we can work with the extrusion multiplier to get wider lines, wider lines do change another setting: it changes the distance between the lines too. Let me show you:

• If you print 100% at 0.4 mm line width, lines are about 0.4 mm wide at 0.4 mm distance.


• If you print 100% at 0.5 mm line width, lines are about 0.5 mm wide at 0.5 mm distance.


• If you print 121% at 0.4 mm line width, lines are about 0.5 mm wide at 0.4 mm distance.

The result is pretty clear: the theoretical lines do overlap, which will lead to the polymer goop getting squished and pressed around to bulge up. Luckily, that stuff usually ends in the infill on the lower layers, but it can result in very messy sides. You pretty much deliberately chose to massively overextrude!

To say it blatantly: line width changes the overall geometry of the slicing to account for the extra material getting extruded, extrusion multiplier does not.

What is the extrusion multiplier for THEN?

Well, using the extrusion multiplier can be done for many reasons, but mainly 2 are interesting:

• Troubleshooting. You can just amp it up or down to test your mechanical properties. Like if your gear ratios on the extruder are correct. Or if your print needs a thicker line to get the first layer sticking.


• Dialing in Filaments. In its core, it is meant to allow to change the flow because different polymer blends might have different thermal properties. For example, the filler and paint could lead to more thermal expansion and die swell, or they could reduce it. This behavior can be tackled directly by adjusting the extrusion multiplier. This is one thing you should do when getting a new type (color&manufactuer) of filament. While some manufacturers try to keep the properties along their lines similar, some won't.

It might not look too obvious at first, but I once had printed a model from one roll of white PLA that came from China. Then I got my fingers on some other PLA that was transparent from the same warehouse. I tried to print the exact same .gcode with it again and got a hyper fragile object that just could get squished, every time I used it with the same settings as the white PLA. I had to increase both the extrusion multiplier and change the temperature to get the same strength as with the other PLA.

share|improve this answer

edited 2 hours ago

answered 3 hours ago

Trish

2,247129

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Again, thank you for the incredibly detailed answer, @Trish.
  – ifconfig
  34 mins ago
  

  
  
  
  

add a comment | 

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

active

oldest

votes

active

oldest

votes

up vote
4
down vote

Generally speaking, both settings result in the same¹: The feed rate of the filament gets adjusted. Either you set a general multiplier, or you demand a wider line which does make it set a higher multiplier hidden in the software.

^{1 - if you don't look at any other factor that is!}

But...

There is always a but, and this one is big:

While we can work with the extrusion multiplier to get wider lines, wider lines do change another setting: it changes the distance between the lines too. Let me show you:

• If you print 100% at 0.4 mm line width, lines are about 0.4 mm wide at 0.4 mm distance.


• If you print 100% at 0.5 mm line width, lines are about 0.5 mm wide at 0.5 mm distance.


• If you print 121% at 0.4 mm line width, lines are about 0.5 mm wide at 0.4 mm distance.

The result is pretty clear: the theoretical lines do overlap, which will lead to the polymer goop getting squished and pressed around to bulge up. Luckily, that stuff usually ends in the infill on the lower layers, but it can result in very messy sides. You pretty much deliberately chose to massively overextrude!

To say it blatantly: line width changes the overall geometry of the slicing to account for the extra material getting extruded, extrusion multiplier does not.

What is the extrusion multiplier for THEN?

Well, using the extrusion multiplier can be done for many reasons, but mainly 2 are interesting:

• Troubleshooting. You can just amp it up or down to test your mechanical properties. Like if your gear ratios on the extruder are correct. Or if your print needs a thicker line to get the first layer sticking.


• Dialing in Filaments. In its core, it is meant to allow to change the flow because different polymer blends might have different thermal properties. For example, the filler and paint could lead to more thermal expansion and die swell, or they could reduce it. This behavior can be tackled directly by adjusting the extrusion multiplier. This is one thing you should do when getting a new type (color&manufactuer) of filament. While some manufacturers try to keep the properties along their lines similar, some won't.

It might not look too obvious at first, but I once had printed a model from one roll of white PLA that came from China. Then I got my fingers on some other PLA that was transparent from the same warehouse. I tried to print the exact same .gcode with it again and got a hyper fragile object that just could get squished, every time I used it with the same settings as the white PLA. I had to increase both the extrusion multiplier and change the temperature to get the same strength as with the other PLA.

share|improve this answer

edited 2 hours ago

answered 3 hours ago

Trish

2,247129

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Again, thank you for the incredibly detailed answer, @Trish.
  – ifconfig
  34 mins ago
  

  
  
  
  

add a comment | 

up vote
4
down vote

Generally speaking, both settings result in the same¹: The feed rate of the filament gets adjusted. Either you set a general multiplier, or you demand a wider line which does make it set a higher multiplier hidden in the software.

^{1 - if you don't look at any other factor that is!}

But...

There is always a but, and this one is big:

While we can work with the extrusion multiplier to get wider lines, wider lines do change another setting: it changes the distance between the lines too. Let me show you:

• If you print 100% at 0.4 mm line width, lines are about 0.4 mm wide at 0.4 mm distance.


• If you print 100% at 0.5 mm line width, lines are about 0.5 mm wide at 0.5 mm distance.


• If you print 121% at 0.4 mm line width, lines are about 0.5 mm wide at 0.4 mm distance.

The result is pretty clear: the theoretical lines do overlap, which will lead to the polymer goop getting squished and pressed around to bulge up. Luckily, that stuff usually ends in the infill on the lower layers, but it can result in very messy sides. You pretty much deliberately chose to massively overextrude!

To say it blatantly: line width changes the overall geometry of the slicing to account for the extra material getting extruded, extrusion multiplier does not.

What is the extrusion multiplier for THEN?

Well, using the extrusion multiplier can be done for many reasons, but mainly 2 are interesting:

• Troubleshooting. You can just amp it up or down to test your mechanical properties. Like if your gear ratios on the extruder are correct. Or if your print needs a thicker line to get the first layer sticking.


• Dialing in Filaments. In its core, it is meant to allow to change the flow because different polymer blends might have different thermal properties. For example, the filler and paint could lead to more thermal expansion and die swell, or they could reduce it. This behavior can be tackled directly by adjusting the extrusion multiplier. This is one thing you should do when getting a new type (color&manufactuer) of filament. While some manufacturers try to keep the properties along their lines similar, some won't.

It might not look too obvious at first, but I once had printed a model from one roll of white PLA that came from China. Then I got my fingers on some other PLA that was transparent from the same warehouse. I tried to print the exact same .gcode with it again and got a hyper fragile object that just could get squished, every time I used it with the same settings as the white PLA. I had to increase both the extrusion multiplier and change the temperature to get the same strength as with the other PLA.

share|improve this answer

edited 2 hours ago

answered 3 hours ago

Trish

2,247129

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Again, thank you for the incredibly detailed answer, @Trish.
  – ifconfig
  34 mins ago
  

  
  
  
  

add a comment | 

up vote
4
down vote

up vote
4
down vote

Generally speaking, both settings result in the same¹: The feed rate of the filament gets adjusted. Either you set a general multiplier, or you demand a wider line which does make it set a higher multiplier hidden in the software.

^{1 - if you don't look at any other factor that is!}

But...

There is always a but, and this one is big:

While we can work with the extrusion multiplier to get wider lines, wider lines do change another setting: it changes the distance between the lines too. Let me show you:

• If you print 100% at 0.4 mm line width, lines are about 0.4 mm wide at 0.4 mm distance.


• If you print 100% at 0.5 mm line width, lines are about 0.5 mm wide at 0.5 mm distance.


• If you print 121% at 0.4 mm line width, lines are about 0.5 mm wide at 0.4 mm distance.

The result is pretty clear: the theoretical lines do overlap, which will lead to the polymer goop getting squished and pressed around to bulge up. Luckily, that stuff usually ends in the infill on the lower layers, but it can result in very messy sides. You pretty much deliberately chose to massively overextrude!

To say it blatantly: line width changes the overall geometry of the slicing to account for the extra material getting extruded, extrusion multiplier does not.

What is the extrusion multiplier for THEN?

Well, using the extrusion multiplier can be done for many reasons, but mainly 2 are interesting:

• Troubleshooting. You can just amp it up or down to test your mechanical properties. Like if your gear ratios on the extruder are correct. Or if your print needs a thicker line to get the first layer sticking.


• Dialing in Filaments. In its core, it is meant to allow to change the flow because different polymer blends might have different thermal properties. For example, the filler and paint could lead to more thermal expansion and die swell, or they could reduce it. This behavior can be tackled directly by adjusting the extrusion multiplier. This is one thing you should do when getting a new type (color&manufactuer) of filament. While some manufacturers try to keep the properties along their lines similar, some won't.

It might not look too obvious at first, but I once had printed a model from one roll of white PLA that came from China. Then I got my fingers on some other PLA that was transparent from the same warehouse. I tried to print the exact same .gcode with it again and got a hyper fragile object that just could get squished, every time I used it with the same settings as the white PLA. I had to increase both the extrusion multiplier and change the temperature to get the same strength as with the other PLA.

share|improve this answer

edited 2 hours ago

answered 3 hours ago

Trish

2,247129

Generally speaking, both settings result in the same¹: The feed rate of the filament gets adjusted. Either you set a general multiplier, or you demand a wider line which does make it set a higher multiplier hidden in the software.

^{1 - if you don't look at any other factor that is!}

But...

There is always a but, and this one is big:

While we can work with the extrusion multiplier to get wider lines, wider lines do change another setting: it changes the distance between the lines too. Let me show you:

• If you print 100% at 0.4 mm line width, lines are about 0.4 mm wide at 0.4 mm distance.


• If you print 100% at 0.5 mm line width, lines are about 0.5 mm wide at 0.5 mm distance.


• If you print 121% at 0.4 mm line width, lines are about 0.5 mm wide at 0.4 mm distance.

The result is pretty clear: the theoretical lines do overlap, which will lead to the polymer goop getting squished and pressed around to bulge up. Luckily, that stuff usually ends in the infill on the lower layers, but it can result in very messy sides. You pretty much deliberately chose to massively overextrude!

To say it blatantly: line width changes the overall geometry of the slicing to account for the extra material getting extruded, extrusion multiplier does not.

What is the extrusion multiplier for THEN?

Well, using the extrusion multiplier can be done for many reasons, but mainly 2 are interesting:

• Troubleshooting. You can just amp it up or down to test your mechanical properties. Like if your gear ratios on the extruder are correct. Or if your print needs a thicker line to get the first layer sticking.


• Dialing in Filaments. In its core, it is meant to allow to change the flow because different polymer blends might have different thermal properties. For example, the filler and paint could lead to more thermal expansion and die swell, or they could reduce it. This behavior can be tackled directly by adjusting the extrusion multiplier. This is one thing you should do when getting a new type (color&manufactuer) of filament. While some manufacturers try to keep the properties along their lines similar, some won't.

It might not look too obvious at first, but I once had printed a model from one roll of white PLA that came from China. Then I got my fingers on some other PLA that was transparent from the same warehouse. I tried to print the exact same .gcode with it again and got a hyper fragile object that just could get squished, every time I used it with the same settings as the white PLA. I had to increase both the extrusion multiplier and change the temperature to get the same strength as with the other PLA.

share|improve this answer

edited 2 hours ago

answered 3 hours ago

Trish

2,247129

share|improve this answer

share|improve this answer

edited 2 hours ago

edited 2 hours ago

edited 2 hours ago

answered 3 hours ago

Trish

2,247129

answered 3 hours ago

Trish

2,247129

answered 3 hours ago

Trish

2,247129

2,247129

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Again, thank you for the incredibly detailed answer, @Trish.
  – ifconfig
  34 mins ago
  

  
  
  
  

add a comment | 

• 
  
  
  

  
  

  
  
  
  
  
  

  
  Again, thank you for the incredibly detailed answer, @Trish.
  – ifconfig
  34 mins ago
  

  
  
  
  

Again, thank you for the incredibly detailed answer, @Trish.
– ifconfig
34 mins ago

Again, thank you for the incredibly detailed answer, @Trish.
– ifconfig
34 mins ago

add a comment | 

 

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