I’ve got a reply from support telling me to check the AMS mainboard and reconnecting some cables
If this doesn’t fix the issue they’ll send me a new mainboard.
I didn’t even manage to load filament once through the AMS i have now lol
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I switched the AMS 2 Pro to the left nozzle and it works flawlessly. If I push some filament in the left or right extruder, the right one needs more force (in the bent), this seems to irritate the odometer sensor.
But using the ams left seems to broken in mobile app, I can’t use any ams filament, only the external right spool. Back to Desktop printing…
Exact same issue on P1S with AMS 2 Pro. If i click retry and hold the ptfe upright just before it enters the head i get better results. Also it seems to fail less with the lid off as the ptfe isnt on such a shallow entry angle. Seems like its snagging something just as it enters the head.
6 hour print today and its happened maybe 10 times, lots of retrying, clearly the extruder isnt clogged. It might be doing it more and retrying and suceeding, not watching it so not sure.
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I’m having a different Issue but i’m not sure if it is related somehow.
The AMS has multiple times told me that the AMS ran out of filament, but my spool still has over 0.800 gr of filament left. I had to fully pull out the filament from the AMS and then put it in again. I don’t understand why is doing it. I already check that nothing is preventing the rotation of the spool inside the AMS and that the filament doesn’t get stuck on its travel to the extruder.
In the device, reading the filament is not identified and stays as unknown (?), but it prints that layer. Then On the next layer the same thing happens filament shows as empty and gives me an error.
I deactivated the “update the remaining capacity”, but it keeps doing the same.
Mine is a multi color print of 5 days and I have 1 day left. I dont want to cancel my print. . .
That’s been my observation as well, I printed the 2 models that Bambu support suggested in my earlier post above which were supposed to help keep the PTFE at a consistent angle and even that isnt working for me.
I’m going to attempt to print this once my current print job is done and I’ll follow up again
I’ve been down since Fri since I added a new AMS Pro to my printer. I have AMS Pro and AMS to the left hotend. I have a AMS Pro on the right hot end. The filament gets to the extruder and doesn’t get grabbed. I did a cold pull and the extruder works. The right hotend works flawlessly.
I suspect the internal hub with ports for each hotend, may be the culprit. Feeling the sliding part on the hub, each feels different. Even at rest with no filament loaded, the slider on the hub ends up in a different position. Seems to me everything points out to the hub as the issue.
All i had back from Bambu Support was that they think there is excess resistance on the spool, but thats clearly not the case, its winding it in cleanly all the way to the print head. I even sent them a video of this. They also said check for wear on the funnels, i reminded them this was a brand new printer last week and its done very little work and happens on any slot 1-4!
Opening the lid and holding the PTFE at different angles makes no real difference. Feels like the AMS 2 Pro feedback on pressure isn’t tweaked for P1S operation or is very sensitive (as people say it happens on H2D too).
I’ve had a few jobs out just by hammering resume every time it stops, eventually it prints but clearly not a solution.
I’ve just experienced the exact same problem with the H2D my work bought.
I posted on the Facebook group about 2 weeks ago asking if anyone had any ideas, a lot of people said it was down to filament brand or moisture in filament or filament being too stiff.
I changed filament, dried it and used known good filament from my personal machines all to no end.
I contacted Bambu about the issue and just received some replacement parts yesterday. Bambu replaced the filament hub inside the AMS aswell as all the sensors and wiring to go with the sensors. I have just now replaced these parts and am running the first test multi colour print getting the AMS 2 Pro to do 146 colour changes to ‘stress test’ it to make sure the problem is resolved.
Had the H2D coming up 3 weeks and it never worked straight out of the box.
Hopefully it’s not the start of a widespread issue but I experienced it from day one from the first batch of printers!
In summary I contacted Bambu explained my issue and they sent out a new filament hub aswell as all the sensors and cables and that seems to have solved the problem. I won’t know for definite until this print finishes successfully but at the moment I’m 10 filament changes in and it hasn’t failed to load the filament once!
Hope this helps some people who are experiencing the same problem!
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Just wanted to update, Bambu support is sending me a replacement AMS Hub, but I printed this AMS Hub Guide model in the meantime and have a 38 hour multicolor print job going at the moment and have not had the issue happen even once.
I printed the second option that slightly relocates the AMS Hub a little higher for better alignment and I honestly feel this is better than Bambu’s own design. I’ve had this print job running for over a day and have had no problems whatsoever.
I’ll include some other accessories I installed as well that may have also had a hand in solving the issue below
1. Hotend / Toolhead PTFE Guide by K2_Kevin - MakerWorld
2. Simple AMS slot 3 retraction issue fix by Dunkelziffer - MakerWorld
3. AMS Fix For Failed To Retract Filament Error by SPStudio - MakerWorld
I have a similar issue which I just lodged a ticket, Doesn’t matter if it’s in slot 1-4 it grabs when you feed it and comes out the ams/extruder up to the filament buffer and then comes back, or it will go through the filament buffer about 1 inch and then it will return back.
Also RFID stopped autodetecting (All Bambu Genuine) and my AMS Firware says it’s 00.00.00.00 AMS1 in bambu studio.
Hoping the End of April Update is the solution of this… or I just have a faulty unit.
Bambu support just came back to me and told me to put the AMS on top or to the right of the printer! I need it on the left for my layout. They’re mad, what if I decide i want more AMS and one has to go on the left!
They also said check the troubleshooting guide again even though I already have. Useless support so far.
There is me thinking I bought a Bambu because I didn’t want to be an expert in repairing 3d printers! That’s why i didn’t buy a Creality! Guess I was wrong
Mine also says 00.00.00.00 for my AMS 2 Pro so that may be normal, once I installed the AMS Hub Guide I haven’t had any issues at all.
Same behaviour on a brand new x1c+buffer+ams2pro.
My ticket was US250416282001, no response yet
Good luck. I’ve replaced the filament buffer (I noticed the connector wasn’t in straight), but that still didn’t solve my issue. Support are sending me a new AMS.
I think I have it sort of figured out. I’ve had the same issue with 2 AMS 2 Pro’s for 2 days since the moment I set them up with also new AMS Hubs (and also tested with AMS Buffers).
I believe that the issue is that the gripping that the AMS 2 Pro does on the filament is too strong and leaves grooves that are too deep.
What happens then is that if the angle of any connection is not near perfect, then the filament catches on the grooves on the entry to the next part of the path. Out of the entire path, it would seem that tube to extruder is the most prone to catching, but is definitely not exclusive to the extruder. And this is also why it is a crapshoot if it works or not. It’s a matter of a bit of luck that the groves don’t catch in a tube lip or the extruder inlet.
I noticed that the part of the filament that returns to the spool after a filament is unloaded comes out significantly discolored like when the filament is stressed a lot. When comparing the grooving created by and AMS and an AMS 2 Pro, there is not contest, the 2 Pro is significantly deeper, hence the stress discoloration.
This heavier grooving is also why the filament coming from an AMS 2 Pro makes significantly higher rattling when crossing the AMS Buffer or AMS Hub.
I don’t believe the issue is with the Buffers or Hubs at all
What would be the solution to this?
This is what finally resolved it for me, I printed the second option that relocates the AMS Hub slightly higher for better alignment.
Ever since I installed this I have not had the issue happen even once and I’ve been printing for about a week now
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Yep I saw the same thing too, all 4 filament spools after multiple retries are noticeably scratched/marked.
I’m going to give AMS Buffer Guide + Quick Release (Version 2!) by dedge - MakerWorld a go which is the buffer model for the same solution and see how I get on.
Loving the X1C, but man the AMS 2 Pro has been a massive let down, nothing but issues with it so far.
I’ve got exactly the same issue. Only with one AMS though. The AMS sounds like it grinding.
Watching the PTFE it doesn’t even make it to the buffer. It gets about 3/4 of the way down the tube, makes a grinding sound and then retracts.