UM3 Material Grinding

[cmssss 0]

Hello Ultimaker community,

In the middle of a print, my ultimaker 3 has started to air-print. When I checked what was wrong, I saw that the material was being grinded and a dollop of plastic was stuck to the tip of the printcore. Does anyone have a suggestion on how to fix this?

Thanks,

cmssss

[fbrc8-erin 296]

Does it look like your printed part came off the bed? Or is the plastic on the end of the nozzle tip coming out of the nozzle? If there was nowhere for the filament to go (for example, it got burnt into the tip of the Core), then it could fail to extrude and result in grinding.

What material are you using? What settings?