This looks like a fantastic solution! Also thanks to @bryan.dasilva for initially sharing this design.
Oh, this is a good idea…
Hi. I use a 32mm (mechanical) socket inside the center of the spool. Well it’s a Jayo cardboard filament spool. I do not know the center hole radius of Polymaker’s, and if it has some kind of flange. I’m certain a big metal or glass ball would do as well. The socket rolls inside the inner hole so the the weight is always in the right place, never unballancing the spool. Up to now works flowlessly. And for the outer flange electrical tape.
Bambu delivered my AMS P1S two weeks ago, either the recent AMS has shrunk tiny bit or the cardboard spools diameter has increased. Because four popular rings I’ve tried are all too thick for AMS lid to close fully without scratching the lid (Even BL’s own spools scratch the lid a bit). I even CADed one myself with thinnest wall possible 0.8 mm and still that is too thick.
I ended up using a 1/2" painter/masking tape, no problem closing the lid but I haven’t used it in my AMS yet because I can’t get it to catch the extruder (with BL filaments.) Hopefully BL will respond to my ticket soon.
I tried the printed spool adapters posted by Polymaker for their spools in the Bambu AMS and as their video shows, they work fine, WITH THE AMS OPEN. Closing the AMS causes the spool to hit the top of the AMS and stop it from working. Really a bummer.
Resorted to electrical tape on the edges of the spool. Inelegant and wasteful, but so far, functional.
I still find this method to be the best and always works. I’ve recored over 100 Polymaker spools without any issues.
Polymaker and Duramic Cardboard Spool Adapter by 3Designforlife | Download free STL model | Printables.com
3 Likes
I use your winder. Great invention, to say the least. I don’t use carboard spools in my AMS. (As Bambu warns.) And after using the Pastamatic Filament winder, I see why–The friction panels used on the Supply spool get covered in cardboard dust. I certainly don’t want that dust inside my AMS units. 
I had visions of a massive spool uncoiling moving to the adapter but it has been happily uneventful. Highly recommend!
1 Like
Same here on recored polymaker spools.
As soon as it comes out of the dryer it goes straight to BL spools with center core desiccant and stored in a one of those cereal plastic bins. From there it will go straight into the AMS when needed.
No lost spools! No tangles. And because of the desiccant core the spool halves never come apart. They also fit my Qidi dry box perfectly.
Five minutes tops from dryer to AMS!
Pro tip: The cardboard sides come apart much easier when right out of the dryer. The inner ring of glue cleans up easier also.
1 Like
There is no reliable solution for that at the moment, I think only winding on another plastic spool is the only way right now. You cannot even close the AMS lid with the solution that Polymaker gave. The electric tape can work for some time but then it will fail or one day there will be a small bump on the end segment and it will get stuck, etc.
I’ve tried a lot of possible solutions. This adapter has been working very well for me for some months now:
I’m using version 1 with the “smooth edges”.
I dare to suggest you my yniversal cardboard spool adapter. I personally use it with polymaker and many users did without having any problem.
You have the choice of themes but maybe you should try the “techno” version:
Give it a try… It’s free 
Polymaker cardboard spools all have varied sizes and you cannot even close the AMS lid, so not a reliable solution still unfortunately.