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Printer is "printing" but no filament is coming out  

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Gurky
(@gurky)
New Member
Printer is "printing" but no filament is coming out

Hi!

As stated in the title, the printer is printing without any filament coming out. How do I go about checking what can be the issue? Do I disassemble the entire print head? Also what is the auto loading function supposed to do? Grab the filament and put it into position? For me it doesn't seem to do anything at all.

Posted : 10/12/2019 11:00 am
bobstro
(@bobstro)
Illustrious Member
RE: Printer is "printing" but no filament is coming out

Verify that the filament feed path is free of excessive friction and feeds smoothly. Check to make sure the extruder tension screw(s) are tight enough to grip and feed the filament yet not so tight as to grind. The auto-feed feature should grab filament as you insert it from the top and feed it down into the hotend where it will start extruding. If you've done these steps and it's not feeding, are you hearing any clicking or grinding noises as it attempts to feed? A clogged hotend or nozzle will usually result in noises as it attempts to feed.

My notes and disclaimers on 3D printing and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan...
Posted : 10/12/2019 11:38 am
Ken G. liked
cwbullet
(@cwbullet)
Illustrious Member
RE: Printer is "printing" but no filament is coming out
Posted by: @bobstro

Verify that the filament feed path is free of excessive friction and feeds smoothly. Check to make sure the extruder tension screw(s) are tight enough to grip and feed the filament yet not so tight as to grind. The auto-feed feature should grab filament as you insert it from the top and feed it down into the hotend where it will start extruding. If you've done these steps and it's not feeding, are you hearing any clicking or grinding noises as it attempts to feed? A clogged hotend or nozzle will usually result in noises as it attempts to feed.

I am having the same issue on one printer off and on.   @bobstro is spot-on correct.  It is most likely the tension screw.  If that does not work, check the alignment of your Bondtech drive gears and make sure the pin hold to the door is attached to both sides securely.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 10/12/2019 11:47 am
Gurky
(@gurky)
New Member
Topic starter answered:
RE: Printer is "printing" but no filament is coming out
Posted by: @bobstro

Verify that the filament feed path is free of excessive friction and feeds smoothly. Check to make sure the extruder tension screw(s) are tight enough to grip and feed the filament yet not so tight as to grind. The auto-feed feature should grab filament as you insert it from the top and feed it down into the hotend where it will start extruding. If you've done these steps and it's not feeding, are you hearing any clicking or grinding noises as it attempts to feed? A clogged hotend or nozzle will usually result in noises as it attempts to feed.

I will do that ASAP and come back with the results. I am not hearing any clicking sound at all. Oh one thing I forgot to mention is that unloading works just fine. 

Posted : 10/12/2019 12:12 pm
Gurky
(@gurky)
New Member
Topic starter answered:
RE: Printer is "printing" but no filament is coming out

This is what it looks like. Seems as if it is unable to feed properly and only grinds the filament? 

Posted : 10/12/2019 12:59 pm
cwbullet
(@cwbullet)
Illustrious Member
RE: Printer is "printing" but no filament is coming out
Posted by: @imgod
Posted by: @bobstro

Verify that the filament feed path is free of excessive friction and feeds smoothly. Check to make sure the extruder tension screw(s) are tight enough to grip and feed the filament yet not so tight as to grind. The auto-feed feature should grab filament as you insert it from the top and feed it down into the hotend where it will start extruding. If you've done these steps and it's not feeding, are you hearing any clicking or grinding noises as it attempts to feed? A clogged hotend or nozzle will usually result in noises as it attempts to feed.

I will do that ASAP and come back with the results. I am not hearing any clicking sound at all. Oh one thing I forgot to mention is that unloading works just fine. 

I do not always have clicking.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 10/12/2019 1:38 pm
Darrell
(@darrell)
Eminent Member
RE: Printer is "printing" but no filament is coming out

Has it ever printed correctly?  One thing nobody ever told me was that the filament must go onto the printer without unwinding even one loop.  If it does, the filament will get stuck on the spool.  Took me weeks before I figured that out.

Posted : 10/12/2019 3:55 pm
Zoltan
(@zoltan)
Moderator
RE: Printer is "printing" but no filament is coming out

@imgod

Please more info, 

loading ok?

it even does not start printing?

what fillament? etc. when you provide at the beginning as much as possible information, you spare your and helpers time, so they do not need to forecast from crystal globe what your printer could do.

 

even an old man can learn new things 🙂
Standard I3 mk3s, FW 3.10.1 RC1, MMU2S, no closed box, sketchup , fusion 360, PrusaSlicer, Windows 10
PRUSA MINI FW 4.3.3, Prusa Connect Beta...
Posted : 10/12/2019 5:58 pm
JoanTabb
(@joantabb)
Moderator
RE: Printer is "printing" but no filament is coming out

is the extruder temperature set to above 170C?

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 : 10/12/2019 11:20 pm
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