Filament jammed
Hello,
I tried my first print yesterday but the filament jammed...
After many try to clear this thing the filament breaked at the PTFE tube :
What are my best option here ?
Re: Filament jammed
So i removed nozzle and heat sink ... the filament is jammed inside the heat sink 🙁 any idee ?
Re: Filament jammed
Take out the PTFE tube; unscrew the heat break.
You should be able to apply heat to the heat break to remove the blockage.
If this happens again, do not remove the extruder. Simply remove the extruder fan and set temp to about 230 to 240 degrees; apply pressure to the filament and wait for a few minutes with pressure applied. It should free itself.
When putting things back together, screw heat break into heat sink then undo half a turn. Insert PTFE, push down and lock in place. Tighten heat break. Put everything else back together.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Filament jammed
Take out the PTFE tube; unscrew the heat break.
Ok so i hold down the black ring and pull the PTFE tube, is that right ?
You should be able to apply heat to the heat break to remove the blockage.
Heat gun (i don't have one) or anything else ?
If this happens again, do not remove the extruder. Simply remove the extruder fan and set temp to about 230 to 240 degrees; apply pressure to the filament and wait for a few minutes with pressure applied. It should free itself.
I tried this before unmounting everything ...
Re: Filament jammed
Yes, push down the black ring which unlocks the PTFE tube.
After you remove the heat break, you should be able to see where the blockage is (above or inside heat break).
Do you have a cigarette lighter?
Patience; leave it longer next time, it will work... But if you assemble the hot end as I suggest, it should not happen again - as long as the PTFE is properly shaped and inserted the right way around.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Filament jammed
Ok i will try this after work.
Thanks
It was the first print with MMU ... i hope this will not happen again 🙂
Re: Filament jammed
It was the first print with MMU ...
Which would imply that there is either an issue with the extruder/extruder assembly or the slicing.
Have you tried any pre-sliced models?
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Filament jammed
I should add the following:
NEVER use a drill to remove filament from either the heat break or the cooling tubes. These are highly polished internally and any metal object inside those parts will cause damage and lead to future problems.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Filament jammed
Have you tried any pre-sliced models?
It was marvin from prusa gcode.
Re: Filament jammed
As long as it was the 2C version from the MM objects...
Haven't printed that myself, but it should work fine.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Filament jammed
So it was jammed inside the ptfe, i put a new one and everthing is good now.
Re: Filament jammed
I should add the following:
NEVER use a drill to remove filament from either the heat break or the cooling tubes. These are highly polished internally and any metal object inside those parts will cause damage and lead to future problems.
Peter
I'm not sure I would call my heat break 'highly polished'. In fact it was the opposite, and this caused jamming problems, which were sorted by me using a drillbit - by hand - to create a very smooth bore.
Re: Filament jammed
Mike
You are probably not aware that the upgrade includes a new heat break which has been designed to assist the unloading of filaments.
To suggest that a drill be used on this new heat break is perhaps not the best advice.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Filament jammed
It might not be the best advice - I'm not an expert, I just know what cleared up my problems with the old heat breaks, which were not particularly 'smooth' internally by any stretch of the imagination.
I am aware that there is a new heatbreak for MM. However, the advice to simply 'heat it up' and then 'push more material through' is, IMHO, unlikely to result in a clean heatbreak. Following this advice I would expect a layer of material to remain on the inside walls of the heatbreak, degrading, burning, dropping blackened material into subsequent prints and making further jams much more likely.
I could be wrong, but what makes you convinced that the 'heat and push' approach leaves us with a clean heatbreak?
Re: Filament jammed
I could be wrong
Yes you are.
Just search the forum, all the information you want is on here.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Filament jammed
I could be wrong
Yes you are.
Just search the forum, all the information you want is on here.
Peter
That's quite rude of you Peter.
Have you got a single reference?
Re: Filament jammed
I've had nothing but jams on my prints thus far, not a single multi color Marvin yet. From what I can tell the filament is stuck on the heat break side of the PTFE tube and won't retract back though it during the color change sequence. Removing the MM extruder and fulling it out has not been a problem, though it makes we wonder how viable this product is given my success with a various filaments tested.
Once filament has been grooved from the mesh gears is it reusable? Seems that it is likely not, but given that every time I stop a print, it automatically unloads all of the filament, they all get grooved....is this grooved length of filament now bad? Is there a way to NOT have auto unload?
Steve
Re: Filament jammed
I had the exact same issue, very frustrating. turns out it was the nozzle that came with my MM kit. Once I swapped it with my old nozzle it started working great!
Looking at the nozzle the kit came with it appears to be have something other than PLA in the nozzle. I'll try re-installing it and running some cleaning filament at a high temp and do a good old' nylon cold pull.
Re: Filament jammed
@PJR
Just for clarity:
NEVER use a drill to remove filament from either the heat break or the cooling tubes. These are highly polished internally
Wrong - the heat breaks from E3D are not perfect by any means and may need smoothing internally / abrasive edges removing
and any metal object inside those parts will cause damage
Wrong - I have used a drill bit to remove material by hand many times without any damage
and lead to future problems
Wrong - my printer has run much better since I used a drillbit to clean and improve the quality of my heat breaks.
Also for clarity - I have done a quick search of these forums - since you cannot be bothered to addess my reasonable query - and I have found nothing at all to support your idea that shoving more material into a hot and blocked heat break will result in a completely clean heat break. After all - how could it.
Re: Filament jammed
Thanks Roy.e, I swapped nozzles as well, printer ok in Single extruder mode. Need to get it working with multi filaments.