I have a new H2D, beautiful machine! I have previously used X1C, and always with an AMS; forgive me, I’ve been spoiled! Manually feeding filament into the H2D for the other head was a new experience, and I kept screwing it up; it would keep telling me I wasn’t pushing it in far enough. But eventually it would work.
This afternoon, I have a new problem: when feeding the filament into the machine, the little orange slider inside the machine seems to not be working (forgive my lack of knowledge on this - I think this might be the PTFE coupler? A little orange tube inside a spring that slides laterally). When the filament arrives through the PTFE tube and enters the machine, this little sliding part slides all the way to the right, but never lets the filament ‘through’ into the internal PTFE tubing (I can tell because the filament I’m using is a bright colour and I can easily see it through the PTFE). The other orange slider for the input port connected to the AMS seems to slide to the right, but once the filament passes through it it centres itself. The one I’m using fails to do this.
I thought maybe I was feeding something wrong, so I took an AMS off of one of my X1C printers and hooked it up. But the same thing happens when feeding the filament from this second AMS during configuration, the orange slider gets pushed all the way to the right, but the filament never makes it through. The AMS retracts and tries again 2 or 3 times before giving up and throwing an error.
Any advice on how to get the filament to clear this little dam? Many thanks.
Check the hot end are properly installed and aligned, very easy to install them slightly misaligned and the clip will still lock, I did it when I was installing my HF hot end on the left nozzle. You can tell if they are aligned properly if they are perfectly centered on the ooze guard.
Thank you, and good advice. But, I think I didn’t explain the problem properly. The part I’m referring to is where the PTFE first enters the enclosure; there’s still another 30cm or so of PTFE inside the printer before it gets to the extruder (I think?). That internal PTFE never sees the filament, it gets stuck upstream.
Ah ok… check the filament path, buffers and the tube. Maybe swap the PTFE tube for another one. Try to push in a strand of filament by hand see if it snags anywhere. Also make sure the PTFE tube does not have any sharp turns or folds, they need to be smooth and sweeping. Check the ends of the PTFE tube to make sure the cuts are sharp and straight.
Dan, just so the nomenclature is clear, the Buffer(s) that max mentioned is the orange spring-loaded mechanisms you’re referring to.
If the filament can’t make it past the buffer, I think the PTFE tube between buffer and print head isn’t installed correctly (at the buffer end of it), or is obstructed.
That did it! There was a length of filament in the tube. Pulled it out, and all is well. Have now switched to using the old AMS as the feeder for this inlet, so my incompetence won’t create the situation again. Thank you all for the great help.
I have exactly the same problem.
The filament breaks at the buffers (new filament) and I can push the filament through by hand, but when the PFTE tube is on it, nothing works anymore. I’ll have to see how I can take it all apart.
I have the same issue, but have not yet found a solution. It’s extremely frustrating as I’m halfway through a 24hr print with a deadline coming up. I’ve semi-succesfully managed to print this exact file before (with some layer lines), but now out of nowhere, the AMS can not push filament through the yellow part.
I am able to push filament through the opposite way (from the right side of the yellow part) so I’m pretty sure there is nothing stuck inside.
After a while searching online I found this videos which I now assume is my problem…
youtube watch?v=OCOs6_PgBao&t=194s (sry I cant include links as I’m a new user)
I believe it’s a manufacturing problem. If anyone else have this problem and found a solution - please let me know how you fixed it <3 Anything helps as I’m not desperate.
I’m having this exact issue. At the end of my run and my last filament change can’t make it past the buffer and I’m totally stuck. I can’t figure out how to unattach the cable between the yellow buffer and the head so I can clear out broken filament (i’m assuming is in there). Were you able to fix it? what did you do?
I had a similar problem, the sensor under the AMS got clogged with some filement that broke off. I found that out because when i pulled it out, it still thought the filament was still there.
I have not been able to solve the problem.
Check out the video I added in my post above though, I still think that’s the only solution – i.e getting a file and start filing down the thing that blocks the path.
My printer is positioned in a way that makes maintenance a hassle though. Since the post above, I’ve switched to only using 1 nozzle…
To the people that are having filament break at the buffer, do you have a 4 to 1 coupler hanging right before the inlet? I did that for about 1 minute until I saw how much it sagged. Causing a tight bend in the ptfe tube entering the buffer. Its a poor design. Should have had proper mounts for the couplers.
It’s the filament buffer. I had this problem and I followed the wiki guide on removing the filament buffer. It’s not difficult. As soon as I removed it and tilted it, a piece of filament fell out. Problem resolved.
I had the same issue and when disassembling I recognized that one of the small metal parts which are pushed on the filament were assembled the wrong way. I changed this easily and now it works like charm.
