
I understand the weight issue, but what good does making all e-bikes illegal do to prevent people using already illegal e-bikes? If the issue is people illegally modifying their bikes, then that should be what is enforced, not making things illegal for those following the rules.
Most of the trails in the city I live in have a 20 km/h speed limit. I tend to see a lot more regular bikes exceeding that than I do e-bikes. But regardless of type of bike, they should both be stopped for going too fast.
I don’t have a BambuLab printer, but the printers I have owned have done that when the nozzle is clogged, when over extruding or when the print bed is too close to the nozzle.
Basically, something is preventing the plastic from extruding out and the extruder motor is slipping.