My initial thought was that it was kapton tape to prevent heat transfer from nozzle to arm to magnet, causing it to overheat and lose magnetism.
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Its definitely not magnetic as previously suggested⌠Iâm playing with mine (which fell off yesterday). It has a purely adhesive attachment. Its definitely a simple tinted transparent piece of plastic.
Iâm not sure how they expected this to stay on for any significant amount of time. Seems as though it was bound to dislodge and fall off at some point. The adhesive wasnât terribly good.
Personally, if they were worried about friction, if might have made more sense to increase the deepness of the hole by 0.25 - 0.50mm. However that small change would likely cost a lot, so this may be a late cycle band aid.
Iâll probably leave mine sitting in the accessory box and not worry about it.
I got the reply regarding putting it back (which adhesive) from Bambulab:
We do not recommend using any adhesive, as it may affect the magnetâs ability to hold.
You can try gently placing the part back on. If it doesnât hold, thatâs okay.
Cover of the magnet, not magnetic cover