I think this video will speak for itself, but basically, my AMS is failing to feed into my P1S. It gets to the extruder then retracts again. Simultaneously, my printer refuses to adjust temperatures (not sure if thats on purpose). Here is the video: Watch unnamed | Streamable
The other thing I noticed is that the piece that holds the PFTE tube that feeds into the hot end is loose - even if I tighten the two screws (see red arrows in the image). I’m not sure if it’s supposed to be that way?
I’m not sure what you mean by rotate but that’s a good call about not overtightening. Unfortunately, before you said that I came across this page and couldn’t understand why it wasn’t staying up: Nozzle/Hotend Unclogging Procedure for X1 | Bambu Lab Wiki (see heading: 5. Re-install the PTFE tube and support). Unfortunately ended up stripping them which is pretty brutal. For future readers, it takes very little. I just turned them each once and somehow they stripped. Had never touched them before. I hope I don’t have to replace it because it looks like it would be the whole carbon tube assembly if I needed to and wasn’t able to get them out.
I’ll try printing the part you listed from an external spool which will help me answer JonRaymond’s question as well (and thank you for the welcome @JonRaymond )
EDIT: Having started without an AMS for a few months, I noticed that it was really tough to load the external filament compared to how it had been in the past. I eventually got it in, but I also had my PFTE tube pop out in the process (strange because if I lightly tug on it, it seems locked in). Testing the print now that the filament is in.
Yeah, so no fix from that print though it’s a good print so thanks for sharing. I think at this point it seems that something is preventing smooth entry. I’ll give it a disassemble tomorrow, though I’m not really sure what it could be. I suppose I should start at the extruder gears? But you’d think that would prevent me from printing. Is there anything above that I should be looking at that could prevent the filament from flowing in smoothly? It feels like I hit resistance at certain angles before I get to the gears even.
Clean and grease everything up, make sure slring isnt stuck, and the sliding little plastic is able to slide without issue. Fixed my issue with filament not loading and retracting after it reached the extruder. Good luck!
Thanks - yeah once I took a look I realized he means remove it to be able to get at the internals. To my surprise, this may be the issue. The spring was completely compressed.
That’s a bit of an unexpected solution since I figured if that piece was malfunctioning the filament wouldn’t make it as far as it was. Going to test it and read into how to do some maintenance/prevent this, maybe drop a link, and flag thaf answer if that ends up working. All hopefully tomorrow as it’s late now but I couldn’t help but check! Thanks everyone!
edit: did not appear to work - I guess the spring is compressed when filament has passed through?
My hypothesis is that the filament guide is not working properly. I suspect it’s meant to be springy and push upward (of be tightened that way) because my tube is coming out super easily. Mine wasn’t able to be tightened though. It just stripped instantly. It does stay stuck if I pull on the tube, but that’s because it raises the guide and tightens the whole thing. But how to fix that…
I can’t get into the weeds right now, but I want to offer one thing. If those screws are stripped and cause issues you do not have to replace the whole hotend or carbon rods. If you’ve realized this then disregard. If there is even a little thread biting, add some blue loctite, just a bit.
I think i misunderstood what part you said was loose. Still stands don’t over tighten anything on these printers. Some threads are just plastic and, well you know.
Thanks - just looked into that but I think that would solve my issue if the threading was stripped and replacing the screw didn’t help (which might end up being helpful down the road). My issue was the hex head. I just got them out by using a regular hex screwdriver rather than the included Allen key. Pretty odd but it came out without too much fuss and the heads don’t look particularly stripped so maybe the included Allen key just had bad tolerance.
I take it that filament guide isn’t meant to be loose like that though? I don’t recall it ever being loose like that.
By the way, I got a response from support but I don’t think they read my messages in full as they told me to test the filament sensor and try to print. I was able to successfully print.
Yeah the included hex keys with just about any printer are not that great.
Out of curiosity have you unplugged any of the cables that attach the theremistor or the heating element, or the runnout sensor?
Those little connectors are easy to get in misaligned. Usually the fan and thermistor will throw an error, but the runnout sensor and the one above that can get loose and not throw any error.
Looking at the tool head with the cover off you’ll see a larger connector on the left of that little cluster of connectors and a smaller one under it. To the right are the fan, thermistor and heating element connectors. Check the two on the left. The runnout may be loose but the one above that (if memory serves it connects the TH board) can get knocked a bit when working in there.
I watched the vid and I’ve experienced something like that brefore, although I can’t remember how long ago, and I feel like that’s what my cause was. I even purchased new parts but ended up not needing them.
I think I found the issue. Some (most) of the teeth that hold the PFTE tube broke and got stuck and basically flattened into the filament sensor. I could see it when I took apart the extruder and sensor. See photos. Solution is to clean it out and replace this piece (pneumatic connector): Replacing the pneumatic connector (PTFE Tube Coupler) | Bambu Lab Wiki
Unfortunately, neither the printer nor the AMS comes with a spare AFAIK, so I’ll have to wait. Fairly certain this is the issue though. Pictures make that obvious.
Update - that wasn’t the solution though it was likely part of the issue. AMS still failing to feed. I ordered a new filament sensor… Hopefully that’s it
