QUESTION: WHAT MIGHT CAUSE THIS?: Filament stuck in coldend PTFE tube.
[Prusa i3 MK3, original extruder assembly.]
- Coldend fan is working (at least when I was troubleshooting: printer is not mine).
- Filament does NOT have a "blob" at the end; simply will not come out of tube (see "necking" in photo from attempt to pull out with force).
- Replacement tube on order, but would like to know the cause to prevent reoccurrence.
TIA.
Re: QUESTION: WHAT MIGHT CAUSE THIS?: Filament stuck in coldend PTFE tube.
was the PTFE tube loose?
I have a Prusa,therefore I research.
Re: QUESTION: WHAT MIGHT CAUSE THIS?: Filament stuck in coldend PTFE tube.
- Thx.
- Maybe.
- Saw a video mentioning this.
( )
- Could be the case: person who built printer is not particularly technically oriented, but did say he was proud to get it together. In his defense, though, printer did work fine for a while.
- Whatever the case. I will take special effort to get the replacement tube installed correctly...
Re: QUESTION: WHAT MIGHT CAUSE THIS?: Filament stuck in coldend PTFE tube.
it pays to print a clip. gods know why it wasn't added before it was shipped. ill try to find it
I have a Prusa,therefore I research.
Re: QUESTION: WHAT MIGHT CAUSE THIS?: Filament stuck in coldend PTFE tube.
https://www.thingiverse.com/thing:3256155
I think that's it
I have a Prusa,therefore I research.
Re: QUESTION: WHAT MIGHT CAUSE THIS?: Filament stuck in coldend PTFE tube.
- Thx, Chris.
- Hm? Have you used this?
- No makes posted, no comments, no summary details.
- Is clip temporary for assembly, or permanent for operation?
Re: QUESTION: WHAT MIGHT CAUSE THIS?: Filament stuck in coldend PTFE tube.
E3D have an official clip to fit the v6 which I have always used - https://e3d-online.com/collet-clips-pack-of-2
No reason not to print them though, either will do the job equally well. The clip stays in permanently to stop the PTFE moving.
Re: QUESTION: WHAT MIGHT CAUSE THIS?: Filament stuck in coldend PTFE tube.
I have it (I think its that one) sitting in my machine now. that clip was the first (mod) I had to do.
I have a Prusa,therefore I research.
Re: QUESTION: WHAT MIGHT CAUSE THIS?: Filament stuck in coldend PTFE tube.
If I could pin down Josef Průša at a maker festival, and get one square answer out of him. I would ask why this basic E3D part of one of their V6 Hot ends is left off of the assembled V6s in their printers and printer kits... the net cost to his company of properly assembling the Hot End in their printers would be so small as to be almost unmeasurable, whereas the fact that it is left out incurs costs in the support department.
this such an obvious matter, the engineers at Prusa must have a reason to justify it, I doubt the parts supplied to Prusa by E3D to make up these V6 hot ends cost less by virtue of this parts omission. We read occasionally in these pages of errors in the assembly of the V6s And it would be interesting to know if Prusa buys assembled V6s or if they buy the needed parts and assemble them. I have seen video of the V6 assembly at E3D and the test stand where they are heated for final torque application to the nozzle so we can see that they practice what they preach in their assembly guide. However as with any assembled device under mass production there will be a % that fail QC checks and a much smaller % that pass QC but then fail in service and where those numbers fall is a part of the engineering design process tempered with input from the accounting department.
Re: QUESTION: WHAT MIGHT CAUSE THIS?: Filament stuck in coldend PTFE tube.
It's trivial if you have seen a collar lock work, but for those who have never installed the locking clip...
Push the black collet of heat break DOWN to RELEASE the PTFE tube.
Pull out the PTFE tube and inspect its bottom end. End should be clean and beveled.
Reinsert PTFE tube. Don't put it in backwards. Sharp end goes into heat break.
Seat PTFE tube down all the way down.
Pull black up to let it grip PTFE tube. Continue holding downward pressure on PTFE tube while you pull collet up.
Slide u-shaped collar lock under lip of collet to lock it in its up (gripping) position.
In my opinion, omitting the collar lock is a disservice to Prusa owners.
RE: QUESTION: WHAT MIGHT CAUSE THIS?: Filament stuck in coldend PTFE tube.
@all:
Thank you for this thread! I have fiddled around for days with this issue, tried to get help from Prusa support in the PTFE replacement manual etc. to no avail. This thread here finally showed the problem cause and solution perfectly!
Thanks Prusa community!
A bit disappointed by Prusa support and also the design team now as like said here, it really is a questionable decision to leave the ring off seeing how many people have to take their extruders apart because of it every single day. For me it was close to 10 times now within the first week of having my printer...
RE: QUESTION: WHAT MIGHT CAUSE THIS?: Filament stuck in coldend PTFE tube.
Thanks for the video example 🙂