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Endless Under-Extrusion, Please Help  

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Jam2020
(@jam2020)
Active Member
Endless Under-Extrusion, Please Help

I'm at my wits end, I've tried the below already for troubleshooting:

Heatsink on extruder servo motor - Trying to prevent heat creep
Cold Pull - see embedded photo, thats the last cold pull I've got
Increased temp - raised the PLA temp to 222C in an attempt to reduce strain on extruder motor
Reduced the retraction setting - reduced retraction length from .8 to .5mm
Re-sliced model - in case the file was corrupted I've tried several times to re-slice the stl's to eliminate this possibility

Cold Pull

This topic was modified 10 months ago 2 times by Jam2020
Posted : 05/01/2021 3:22 am
Jam2020
(@jam2020)
Active Member
Topic starter answered:
RE: Endless Under-Extrusion, Please Help

Left to right, left is last good print

Right print after adding the heatsink

Posted : 05/01/2021 3:29 am
mGoleta
(@mgoleta-2)
Eminent Member
RE: Endless Under-Extrusion, Please Help
Posted by: @jam2020

I'm at my wits end, I've tried the below already for troubleshooting:

Heatsink on extruder servo motor - Trying to prevent heat creep
Cold Pull - see embedded photo, thats the last cold pull I've got
Increased temp - raised the PLA temp to 222C in an attempt to reduce strain on extruder motor
Reduced the retraction setting - reduced retraction length from .8 to .5mm
Re-sliced model - in case the file was corrupted I've tried several times to re-slice the stl's to eliminate this possibility

Cold Pull

The images are missing.

Posted : 05/01/2021 3:46 am
Jam2020
(@jam2020)
Active Member
Topic starter answered:
RE: Endless Under-Extrusion, Please Help

@mgoleta-2

https://imgur.com/S3W776r

https://imgur.com/Wu0eEYO

https://imgur.com/gMNA505
Sorry, looks like it's having an issue embedding my photos

 

This post was modified 10 months ago 2 times by Jam2020
Posted : 05/01/2021 3:52 am
dimprov
(@dimprov)
Noble Member
RE: Endless Under-Extrusion, Please Help

The good news: At least it seems to fail in a repeatable way at about the same point in the print. 

A few things to check:  Have you checked the spring tension on the extruder gears?  Also, are the gears properly aligned with the filament path?  No filament knots in the spool?

Posted : 05/01/2021 4:09 am
Jam2020
(@jam2020)
Active Member
Topic starter answered:
RE: Endless Under-Extrusion, Please Help

@dimprov

no knots that I can see, the tension spring screw is a little farther out than flush with the nut.

Posted : 05/01/2021 2:40 pm
Jam2020
(@jam2020)
Active Member
Topic starter answered:
RE: Endless Under-Extrusion, Please Help

Any other ideas?

Posted : 08/01/2021 12:21 am
mGoleta
(@mgoleta-2)
Eminent Member
RE: Endless Under-Extrusion, Please Help

Have you looked at this article in the help:

https://www.help.prusa3d.com/en/article/extrusion-problems-prevention_2027

 

 

Posted : 10/01/2021 7:00 pm
Jam2020
(@jam2020)
Active Member
Topic starter answered:
RE: Endless Under-Extrusion, Please Help

@mgoleta-2

Yes I have but thanks for the suggestion

Posted : 30/01/2021 3:59 pm
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