I have found that the issues related to spools binding do not always correlate to spools being Bambu, or too lite, or cardboard but that, in many instances, the roller driven by the first stage feeder is locked up. Even forcing the spool to roll by applying pressure takes quite some force to get it to finally get free and actually roll. I’ve cleaned the gears in the first stage feeder and the rollers themselves but with no discernible difference in how it behaves. Could this be an issue of gearing not releasing properly after a full retraction on the color change prior or something firmware related that isn’t tripping the gears to begin the gear that causes the spool to roll at the same time, or slightly before, the first stage feeder begins to pull the filament in….things that make you go, hmmm….
Maybe someone knows better than me why the roller doesn’t start turning when the feeder starts pulling but this would seem to help stop the constant false tangle errors, Ams motor overloads and failed color changes that plague so many… and maybe it is just an inherent issue with the design of the first stage feeder that the gearing doesn’t always catch the roller properly upon pulling the filament in and it causes it to lock up the roller because the push/pull force is now out of balance. I’m not sure the exact reason for the foul up but that seems to be what happens 9 times out of 10 when it does throw errors at me that weren’t either my fault or an actual tangled spool of filament.
Did you ever get a response? I’m having the same issue.
Same for me, the gear of the roller not releasing causing the spool to jump in the chamber. and occasionally nor engaging for rewind. Looks like a quality issue or some slots just have a very short life span and wears out quicker than others.
I’m having the same problem. I’ve got a full bambu labs spool and when it’s time to rewind the filament the spool just stops spinning. It seems fine going forward. I’ve tried to find how people fixed it, but all the recommendations are to use a bambu lab spool and/or add weight. It seems like a full spool shouldn’t need more weight.
I am also having this issue. Tried so many different fixes. It’s driving me nuts.
I just bought an H2S full combo with the AMS 2 Pro, and am having the exact issue that you describe. I’m getting “AMS Motor Overloaded” errors while printing, and find that the driven rollers at the front of the AMS 2 Pro are “locked” and won’t allow the spool to rotate.
The motor pulls so hard that it wedges the filament into the center of the spool. If I force the spool to turn, or lift it up and let it rotate, it continues printing fine for a few minutes before it happens again.
It will try to unload and reload the filament, but continues to lock the front roller, preventing it from feeding itself the filament.
If I am close to the machine and hear it unloading/reloading the filament I can sometimes catch it in time to release the tension before it throws the “AMS Motor Overloaded” error message.
Using Bambu PLA on Bambu spools. Definitely an issue with the AMS 2 Pro fighting against itself.
Mine has firmware 4.00.19.87.
UPDATE: Now I feel like an idiot, but thought I would share in case this helps others with this issue. My Bambu spools have a small filament clip just inside the perimeter of the spool, which I noticed was in the same position whenever the spool got stuck. I can’t see what it is catching on, but I removed the clips, and completed the next print without any issues.
I designed and tested this as a fix for stuck spools, it has not failed me yet.
do you , by any chance have a installation instruction for this?
Thanks..
It slides into the primary feeder. Look at the pictures.
I am having the same issue with my H2S AMS 2 and only happens in slot 1. Did not have this issue new but now is same as described with roller “locking” while trying to feed. Doesn’t matter brand of filament nor if full or empty or anywhere in between.
Annoying of course & can’t seem to get any answers. Has anyone figured this out? I am not used ng any clips or anything else getting in the way.
thank you for any assistance.