Huge blob of material stuck to nozzle and head! UM3

[sysmop_Israel 0]

Hi everyone!

I've been printing with the UM3 for 2.5 months now fairly extensively. No problems up until last week it started printing very weak structures in what seems to be under extrusion problem.

After cleaning the nozzle and upgrading firmware I've managed to print good prints in ABS. However - the material ran out mid-print and after several attempts to restart from the last point (ending in the head hitting the model pretty hard) I gave up and put a fresh spool of PLA and started a new print.

came back in the morning and saw this (attached photo). what the hell happened? looks like the fan bracket opened mid print.. isn't there some sensor to stop printing in such cases?

I can't remove the PLA and it looks like it really bent the fan bracket.. )-:

[SandervG 1,155]

Hi @sysmop_Israel, welcome to the forums! I wish we could have met under different circumstances though. Usually these problems happen with, first of all, a good level of bad luck, and secondly when your print gets detached from the build plate.

As a result it will be dragged along with your print head, and instead of putting down nice layers it is accumulating at the nozzle.

There should be silicon pads to prevent the filament from crawling up. Do you know if these were still in place, and installed correctly?

Can you still heat up the print cores? If so, remove any filament that is inside and you could try to heat it up to around 230ºC and heat the PLA with a blowdryer from the outside, and see up until how far you can clear it.

Alternatively, perhaps you would just prefer to get in touch with your reseller. They should also be able to help you out. Good luck, and our apologies for the inconvenience!