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Extruder #2 extrusion issue  

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Rob
 Rob
(@rob-21)
Member
Extruder #2 extrusion issue

 

 

 

 

 

 

Im having this print quality issue with my #2 extruder. I tried 3 different brands of filament with the same result. Extruder 2 had the same settings as 1 & 3. When material is moved to different extruder, print quality is good. Not sure what to check for. 

Posted : 13/11/2024 5:49 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Extruder #2 extrusion issue

could your thermistor on extruder 2, be different? 
thermistors are sensors which return a numerical value which is then converted into a temperature via a look up table. the thermistors have a tolerance and you may have samples from different batches.  I believe the prusa (semitec) thermistor is 3% tolerance so I Guess one could be 3% high and the others 3% low or vice versa, so you may have a difference of say 6%
of course if the extruder 2 thermistor is faulty, the difference could be even bigger...   
could you perhaps swap the heater block with thermistor and heater between say extruder 2 and extruder 5, and see if the problem moves to extruder 5?

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Posted : 13/11/2024 6:40 pm
Acht liked
Rob
 Rob
(@rob-21)
Member
Topic starter answered:
RE: Extruder #2 extrusion issue

yeah, it's worth a shot. it does look like a temperature related issue with lots of excess extrusion. my thought is that it's definitely related to either the temperature or the extruder motor not properly feeding material.

Posted : 13/11/2024 6:53 pm
Rob
 Rob
(@rob-21)
Member
Topic starter answered:
RE: Extruder #2 extrusion issue

It's definitely a hotend issue. The problem cleared up on #2 after the swap and followed to #5. I'm going to reach out to Prusa for a replacement.

Posted : 14/11/2024 5:30 pm
Pe3d
 Pe3d
(@pe3d)
Member
RE: Extruder #2 extrusion issue

Hi,

 

It could also be a problem with the idler tension. At the beginning i Had a lot of Extrusion Problems. Tried different settings. In the end my idler tension was to high

Posted : 21/11/2024 8:29 am
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