UM2+ Extended- material overflow

[dani3l 0]

Hi all,

I have an issue with my UM2+ extended printer. So, basically I left it over night and in the morning I saw something like this (picture).
Whole hot end was covered by melted filament. I had to use hot gun to melt it and take it off laver by layer. Once I finished the cleaning it work good, as before. But this overflowing issue happend in next few days again. Does someone of you had similar problem or have a sugestion what could be the reason of such a behaviour? I changed the to make sure it is clean, but it didnt help. I also did atomic method to clean it. Everything looks fine, but at some point it gets stucked...
Any advices would be appreciated.

 

Best,
Daniel

[Smithy 1,146]

It looks like your object has lost the adhesion to the build plate and then sticked to the print head. Could this be the reason?

[dani3l 0]

I used the adhesive, so it doubt it...

[43915 19]

Was some part of the print you started still stuck to the bed when you found the printer like that or was the whole part stuck to the print head? If none of it was still on the buildplate one could assume that it has come loose from the bed during the print and gotten stuck to the print head instead, like Smithy said.

 

Or if it doesn't look like it's caused by the print getting stuck to the print head it could be a leak where the nozzle is screwed on to the hotend, I've had issues with that before. I didn't have a torque wrench and was afraid to tighten the nozzle too much, so it ended up too loose instead and filament slowly started to leak out through the threads. But it doesn't look like that's the problem on the picture.

 

You might have to keep an eye on the printer regularly instead of leaving it overnight to see if you can find out when the problem starts, or maybe set up a camera to film all your prints until it happens again.

[dani3l 0]

There was few centimeters of my print still on the bed. Thanks guys for all advices. I already set a camera and try to record the failure.