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How to work with PETG? Settings, caveats, etc

PETG Collecting on the ExtruderQIDITECH Dual Extruder and PETGPETG filament doesn't stick reliably to fake Buildtak surfaceMessy top layer with PETG filament?Infill failure when printing larger printsEnder 3 Distorted Calibration CubeEnder 3 severe under-extrusionUnderextrusion after long travelsHow to effectively eliminate stringing in 3D printPETG layer adhesion

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2

$begingroup$

We've been doing some printing with PETG filament on Ender 3 Pro printer and the result were awful:

Here are settings we used:

• Extruder: 240 °C


• Bed: ~70 °C (± 10 °C)


• Speed: 80 mm/sec

There are a few types of problems that we had:

1. 
   Initially filament did not stick to the bed - those 3 items in the middle of the picture are example of this issue. This got fixed by increasing temperature of bed to 80 °C.


2. 
   At some point a piece would get dis-attached from the bed and would move around together with the extruder around - two prints in the upper right corner of the picture were cancelled for this reason.


3. 
   Models are very rough, like a cheaply made snowball - that tiny model in the upper left is suppose to be a cattle-bell. Could you tell?

Additional info

Filament that we used indicated

• extruder temperature 230-240 °C


• printing speed 40-90 mm/sec


• no info about bed temperature

Question(s):

• What are some optimal, tried and tested options for printing PETG? _{(Temperatures, speed, etc)}
  


• What are some caveats/difficulties of working with PETG to look out for? _{(For example, I've read that PETG likes slower speeds. Is that true?)}
  


• Is it possible that the model of 3D printer does not work well with this type of filament? _{(I don't have much experience printing so I can't know)}
  

ender-3 petg

share|improve this question

edited 7 hours ago

0scar

15.5k32159

asked 12 hours ago

whateverwhatever

1213

New contributor

whatever is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Are you using the correct filament diameter, it looks as though it is sparsely filled?
  $endgroup$
  – 0scar
  7 hours ago
  

  
  
  
  

add a comment | 

2

$begingroup$

We've been doing some printing with PETG filament on Ender 3 Pro printer and the result were awful:

Here are settings we used:

• Extruder: 240 °C


• Bed: ~70 °C (± 10 °C)


• Speed: 80 mm/sec

There are a few types of problems that we had:

1. 
   Initially filament did not stick to the bed - those 3 items in the middle of the picture are example of this issue. This got fixed by increasing temperature of bed to 80 °C.


2. 
   At some point a piece would get dis-attached from the bed and would move around together with the extruder around - two prints in the upper right corner of the picture were cancelled for this reason.


3. 
   Models are very rough, like a cheaply made snowball - that tiny model in the upper left is suppose to be a cattle-bell. Could you tell?

Additional info

Filament that we used indicated

• extruder temperature 230-240 °C


• printing speed 40-90 mm/sec


• no info about bed temperature

Question(s):

• What are some optimal, tried and tested options for printing PETG? _{(Temperatures, speed, etc)}
  


• What are some caveats/difficulties of working with PETG to look out for? _{(For example, I've read that PETG likes slower speeds. Is that true?)}
  


• Is it possible that the model of 3D printer does not work well with this type of filament? _{(I don't have much experience printing so I can't know)}
  

ender-3 petg

share|improve this question

edited 7 hours ago

0scar

15.5k32159

asked 12 hours ago

whateverwhatever

1213

New contributor

whatever is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Are you using the correct filament diameter, it looks as though it is sparsely filled?
  $endgroup$
  – 0scar
  7 hours ago
  

  
  
  
  

add a comment | 

$begingroup$

We've been doing some printing with PETG filament on Ender 3 Pro printer and the result were awful:

Here are settings we used:

• Extruder: 240 °C


• Bed: ~70 °C (± 10 °C)


• Speed: 80 mm/sec

There are a few types of problems that we had:

1. 
   Initially filament did not stick to the bed - those 3 items in the middle of the picture are example of this issue. This got fixed by increasing temperature of bed to 80 °C.


2. 
   At some point a piece would get dis-attached from the bed and would move around together with the extruder around - two prints in the upper right corner of the picture were cancelled for this reason.


3. 
   Models are very rough, like a cheaply made snowball - that tiny model in the upper left is suppose to be a cattle-bell. Could you tell?

Additional info

Filament that we used indicated

• extruder temperature 230-240 °C


• printing speed 40-90 mm/sec


• no info about bed temperature

Question(s):

• What are some optimal, tried and tested options for printing PETG? _{(Temperatures, speed, etc)}
  


• What are some caveats/difficulties of working with PETG to look out for? _{(For example, I've read that PETG likes slower speeds. Is that true?)}
  


• Is it possible that the model of 3D printer does not work well with this type of filament? _{(I don't have much experience printing so I can't know)}
  

ender-3 petg

share|improve this question

edited 7 hours ago

0scar

15.5k32159

asked 12 hours ago

whateverwhatever

1213

New contributor

whatever is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

share|improve this question

edited 7 hours ago

0scar

15.5k32159

asked 12 hours ago

whateverwhatever

1213

New contributor

whatever is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

edited 7 hours ago

0scar

15.5k32159

asked 12 hours ago

whateverwhatever

1213

New contributor

whatever is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

edited 7 hours ago

0scar

15.5k32159

edited 7 hours ago

0scar

15.5k32159

asked 12 hours ago

whateverwhatever

1213

New contributor

whatever is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 12 hours ago

whateverwhatever

1213

2 Answers
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8

$begingroup$

Slow down!

80 mm/s is much too fast for PETG. Try 45 or 50 mm/s instead, even for infill, supports, and other less-visible areas.

share|improve this answer

answered 12 hours ago

Joel CoehoornJoel Coehoorn

77711

$endgroup$

add a comment | 

2

$begingroup$

None of your prints look like they are sticking well to the bed. You didn't specify the bed material. For many bed types, you might have success with Aqua Net hair spray.

Like any material, if it isn't solidly sticking to the bed, the print won't be good.

This probably is not related to your problem, but you may need to reduce the drive gear pressure or "pinch" of the filament. PETG seems to be softer than PLA or ABS, and I've had problems where it was rolled out like pie crust by the filament feed gear to the point where it would not feed. Reducing pressure, reducing retraction, and increasing the minimum extrusion between retractions helped.

share|improve this answer

answered 11 hours ago

cmmcmm

2,022319

$endgroup$

add a comment | 

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8

$begingroup$

Slow down!

80 mm/s is much too fast for PETG. Try 45 or 50 mm/s instead, even for infill, supports, and other less-visible areas.

share|improve this answer

answered 12 hours ago

Joel CoehoornJoel Coehoorn

77711

$endgroup$

add a comment | 

8

$begingroup$

Slow down!

80 mm/s is much too fast for PETG. Try 45 or 50 mm/s instead, even for infill, supports, and other less-visible areas.

share|improve this answer

answered 12 hours ago

Joel CoehoornJoel Coehoorn

77711

$endgroup$

add a comment | 

$begingroup$

Slow down!

80 mm/s is much too fast for PETG. Try 45 or 50 mm/s instead, even for infill, supports, and other less-visible areas.

share|improve this answer

answered 12 hours ago

Joel CoehoornJoel Coehoorn

77711

$endgroup$

share|improve this answer

answered 12 hours ago

Joel CoehoornJoel Coehoorn

77711

answered 12 hours ago

Joel CoehoornJoel Coehoorn

77711

answered 12 hours ago

Joel CoehoornJoel Coehoorn

77711

2

$begingroup$

None of your prints look like they are sticking well to the bed. You didn't specify the bed material. For many bed types, you might have success with Aqua Net hair spray.

Like any material, if it isn't solidly sticking to the bed, the print won't be good.

This probably is not related to your problem, but you may need to reduce the drive gear pressure or "pinch" of the filament. PETG seems to be softer than PLA or ABS, and I've had problems where it was rolled out like pie crust by the filament feed gear to the point where it would not feed. Reducing pressure, reducing retraction, and increasing the minimum extrusion between retractions helped.

share|improve this answer

answered 11 hours ago

cmmcmm

2,022319

$endgroup$

add a comment | 

2

$begingroup$

None of your prints look like they are sticking well to the bed. You didn't specify the bed material. For many bed types, you might have success with Aqua Net hair spray.

Like any material, if it isn't solidly sticking to the bed, the print won't be good.

This probably is not related to your problem, but you may need to reduce the drive gear pressure or "pinch" of the filament. PETG seems to be softer than PLA or ABS, and I've had problems where it was rolled out like pie crust by the filament feed gear to the point where it would not feed. Reducing pressure, reducing retraction, and increasing the minimum extrusion between retractions helped.

share|improve this answer

answered 11 hours ago

cmmcmm

2,022319

$endgroup$

add a comment | 

$begingroup$

None of your prints look like they are sticking well to the bed. You didn't specify the bed material. For many bed types, you might have success with Aqua Net hair spray.

Like any material, if it isn't solidly sticking to the bed, the print won't be good.

This probably is not related to your problem, but you may need to reduce the drive gear pressure or "pinch" of the filament. PETG seems to be softer than PLA or ABS, and I've had problems where it was rolled out like pie crust by the filament feed gear to the point where it would not feed. Reducing pressure, reducing retraction, and increasing the minimum extrusion between retractions helped.

share|improve this answer

answered 11 hours ago

cmmcmm

2,022319

$endgroup$

share|improve this answer

answered 11 hours ago

cmmcmm

2,022319

answered 11 hours ago

cmmcmm

2,022319

answered 11 hours ago

cmmcmm

2,022319