I just recently got my P1S with AMS delivered and set up. Ive been able to work through all the hiccups I ran into along the way except 1. The second slot from the left in my AMS won’t pull in filament when I load it. I hear a dull grinding sound and the filament doesn’t go into the tube and the spool doesn’t turn. When I load filament into any of the other AMS positions it makes a quiet hum and works fine.
If I “help” (by forcing it) while the AMS is trying to pull the filament in - it will go in, but the first time it tries to unload that filament I end up with all of it tangled in my AMS, not back on the roll. Even once I fix that it won’t load it again unless I force it.
This makes multicolor prints that use the second slot impossible, and if I do use that slot the print will fail before it finishes due to the AMS trying to put filament back on the spool, and it tangling up in the AMS chamber.
I’ve searched everywhere I could and couldn’t find a solution. I’ve found solutions to similar issues that don’t resolve my issue. Bambu is completely non responsive through their ticket system so far - and I’m about to the point where I’m going to send the whole thing back since I have no confidence in BL of making things right. If I can fix this myself and get on with my life I will.
I’ve tried 3 different brands and 4 different materials across all the slots. 2 always fails, and the other three slots always work so I’m confident it’s the specific slot in the AMS. The lights don’t indicate any problem.
Anyone have any ideas on what I could do to resolve this?
I have this exact same issue. This was on a brand new AMS. Slot #2 always fails to load. This happened out of the box and should not contain any broken filament (I still followed instructions to confirm no broken filament in PTFE tubing on second slot). After further inspection, at least on my AMS, it looks like the roller in slot #2 that rotates the spool is not rotating
ok, that turned out to be the problem. After closer inspection, I saw one of the bearings was not fully seated. After pressing and snapping in place, that slot started working. Thanks!
Make that 3 of us! Brand new AMS and slot 2 fails to load, all I get is a grinding noise. I’ll check to see if the bearings are seated properly after reading the responses here. Sounds like a common issue apparently and always with slot 2
UPDATE: Got home and checked bearings and sure enough left side of front bearing for slot 2 was popped out and not seated. Looks like a common problem . I seated the bearing and all is running normal now.
I’m guessing this was my problem as well. I pulled out a full spool and put a weight inside and it just magically worked, and had worked ever since.
Thanks everyone! I really hope this gets enough attention to be easily findable by the next people who run into this problem - or gets added to a KB or troubleshooting guide or something.
It definitely sounds like a specific problem with the second slot. Since the other slots work fine, it’s probably not a filament issue. One thing you might try is checking for any obstructions or misalignments in the second slot’s loading mechanism. Sometimes a small piece of debris or a slight misalignment can cause the kind of problems you’re describing. If you haven’t already, maybe try giving the slot a thorough cleaning and making sure everything is seated correctly. Sometimes, gently adjusting the components can make a big difference.
Checking here as well - just received my printer and AMS, grinding on slot 2 and 3. Bambu probably should get an eye on this.
I understand it is rectifiable, but from a user experience perspective, I could understand someone new to printing might have a lot of anxiety if that happened straight out of the gate.
UPDATE FROM 2024
This problem happened to me on the same slot, in my case one of the bearings was out ofthe rail, with some push with the finger and a click, the problem was solved.
This same thing happened on my brandnew AMS, slot three was not loading, the bearing was out and the rubber roller has a flat spot in it now, but the filament in that slot is now loading!
In my last post, two entries above, I put a screenshot link, you only have to push with a finger pointing to the ground just to hear a click, which means that the roler is on the proper rail.
Thank you this solved my issue for newly received AMS, two of the spots needed the roller pushed in. As soon it clicked in started working no problems.