Hi everyone, recently received my AMS Lite (for my A1), and today I tried to print with some Prusament I have. Just about every layer though, the printer would give me an error saying “Unable to feed filament into the extruder. This could be due to entangled filament or a stuck spool. If not, please check if the AMS PTFE tube is connected.” I tried to print different things with it but they all failed. This only ever happens with my Prusament so I was wondering, has anyone been able to print Prusament on their AMS Lite? Is it just not possible?
Due to excessive amounts of prusameters half of my spools are Prusament. I designed some adapters for the AMS lite and haven’t had any issues yet. The only issue I had with filament was that I pulled the spool off of another printer and plonked it on the AMS, and it failed to feed. It was because I didn’t cut off the end straight before loading it (it still had the blob from the other extruder).
But I guess that shouldn’t be the issue?
Does the filament reach into the extruder (extruder pulling it) or does it fail before it reaches it (AMS motor not able to pull it)?
Interesting! Yeah, the filament doesn’t even get to the extruder. It seems like the AMS just doesn’t push the filament far enough.
I’ll definitely test out your spool adapters 
Then there are a couple things I can think of:
1: are your Prusament spools quite full? Because I use different brands and some wind the filament neatly (in this case Prusament, slot 4, and Das Filament, slot 2), and Bambu is quite messy (slot 1 and 3). In most cases neatly is better because it can’t jam inbetween the spool walls and the roll but with the AMS the Prusament can be pulled quite diagonally when full on a neat spool creating extra friction.
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Just in general, because Prusament spools sit further out on the AMS lite, the sideways pulling is worsened in slots 2 and 3 so if that is the slot you are using try slot 1 or 4.
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What kind of filament are you using? Because it might be too slippery for the AMS? Not sure if that can be a thing…
(4. Of course still trusting your filament isn’t tangled)
Wow, thanks for the detailed reply…
I’ve actually spooled some of the Prusament onto an empty 250g spool (because the Prusament won’t fit on the AMS) so I don’t think the extra tension from it pulling to one side is the problem. And yes, the filament is spooled very nicely with no tangles. It’s also just regular PLA too. I did notice as the extruder starts pushing filament into the hotend, the pice above the tool head that says “AMS” on it starts to be pushed down towards the hotend. Not sure why this is happening, but it seems like its creating some sort of tension.
I believe it works differently. The bit on top is spring loaded and when the tension on the filament is too high it pulls it down and triggers the error.
For this to happen the extruder needs to be pulling (so the filament should be inside) and the filament should be hold back on the otherside (tangled spool, locked AMS spinny thing, something). Maybe turn off the printer while it is doing it’s error thing and pulling the thingy down, and try to feel where the resistance is coming from. Pull the bowden out of the splitter thingy and try to see where the friction comes from?
The thing is it does this multiple times each print and only with Prusament. I tried using some Bambu stuff and it works just fine. Now, I did notice that the front Bowden tubes cut a pretty short angle and I was wondering if that had anything to do with it. I also have some silk filament that gives the same error as the Prusament. The filament was in slot one and gave the error, so I put it in slot four (slot four has a less sharp angle) and so far, my current print is doing very well and hasn’t given an error at all. Here is a picture of my AMS setup…
I used Prusament last week, on slot 1.
Jammed the spool on best I could, and it seemed fine - no errors (although it was a half used spool)…