You may have already heard, but the Bambulab AMS unit doesn't play well with cardboard spools, from slipping problems to dust inside the unit, while cardboard spools are becoming more and more popular. It's not an ideal situation, and so to overcome that, I wrap the edges of spools with electrical tape.
I have tried other methods like printing the rings for the edges, and I found it finicky, and I didn't like having to wait to print more rings.
Electrical tape has been quick & easy to implement, lasts as long as the roll lasts, and has caused me no problems while printing with the AMS.

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