Help wanted undextrusion and stuck filament
a month ago by prenatal_confusion to c/3dprinting
I have been getting these lines where there seems to be not enough filament extruded accompanied by some clocking noises (not really grinding). Recently I got a few errors about stuck filament as well.
I did a few cold pulls but there wasn't any debris to be seen and the three ends (cht) were clearly visible.
Noises, pattern and errors persist.
Pla, core one, max layer with 0.4 nozzle.
Any help appreciated
Edit is the image not loading for everyone?
A low friction filament path solves a lot of under extrusion issues. See if you can build a filament holder with ball bearings and/or a filament guide before the extruder. It solved all my issues with my former Ender 3.
Good point.
Without knowing what printer you have I offer this advice:
Does your printer keep the temperature? I had a creality cr6 that underextruded and in my case it was bad capacitors on the heating element circuit.
It is a core one and the temp does seem stable
If temp is stable try having a look at the filament. Is the extruder grinding the filament?
It could also be a case of a blocked nozzle. Though that doesn't explain the stuck filament. scratch that I just reread your post
When starting with an unpowered printer, i.e. the first print after powering printer up, does the issue happen at any part of the print, or only after a little while?
Picture works now. It starts immediately
And no grinding on the filament.
Edit thr indx upgrade is coming soon so a thorough rebuild is coming too.
Maybe a rebuild will fix whatever is causing this. Because when you experience:
That does sound like a strictly a failure in the filament movement system. And I can only think of
And since clearing the nozzle didn't work, and you don't find signs of grinding, nor observe temperature swings, then I'm out of ideas.
Do you happen to have spare nozzles? Maybe try swapping the nozzle and see if it was still clogged? I've had nozzles that I just couldn't clear.
@prenatal_confusion @BigDanishGuy I got a #3DPrinting prusa core one my question is name every thermoplastic type you used then see if that’s why it is clogged imagine if someone used aluminium to extrude & then tried wax that’s why I am asking
Only petg and pla with this head.
That (or something like it) happens to me with some bad filament. It gets stuck in a blob inside the printer head between the hot end and the gears pulling in the filament.
I have to take apart the printer head and pull the hardened blob out. I actually have to do it now.
Since I have the end of the pulled filament and can see the 3 times split from the cht the blob is either not there OE inside one or more of the smaller channels after the split.
Had something like this happen on my old ender 3. I replaced/upgraded the hotend and it went away
Nozzle might also just be too close to the bed.
Mine did a kind of of "tock" sound when it struggled to extrude.
PS: image link seems broken
That should atop after a few layers though, right?
Not necessarily since the initial layers don't have the space to be squished properly, subsequent layers can show the same problem, except they're too close to the previous layer instead of the bed itself.
That said, the picture didn't load before but now it does.
With the picture, this looks kinda like wet filament to me where it'll kinda bubble here and there.
I've also spent way too much time hunting down underextrusion what was ultimately just the filament that had a weird undersized diameter like 1.6mm.
Diameter that's off but consistent through the roll can be compensated for in the slicer, inconsistent diameter not so much.
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@lemmy.world
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
The r/functionalprint community is now located at: or !functionalprint@fedia.io
There are CAD communities available at: !cad@lemmy.world or !freecad@lemmy.ml
No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia. Code of Conduct.
Be respectful, especially when disagreeing. Everyone should feel welcome here.
No porn (NSFW prints are acceptable but must be marked NSFW)
No Ads / Spamming / Guerrilla Marketing
Do not create links to reddit
If you see an issue please flag it
No guns
No injury gore posts
If you need an easy way to host pictures, https://catbox.moe may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is 
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How about your filament path? Is there high resistance? The filament roll, is it hard to roll on your filament holder? How about reverse bowdens?
Is the extruder gear too tight or too loose?
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