PLA accumulation before entering printcore

[anonyme 0]

I have an issue with my Ultimaker 3 extended: my PLA filament keeps getting stuck between the Bowden tube and printcore. I have cleaned the nozzle with the hot and cold pull technique with no results.

 

Any leads on the issue and way to fix it?

 

Picture of the issue

 

Thank you!

[gr5 2,234]

Are you sure it's PLA and not PVA?

 

So that blob must have been deep in the print core to get soft.

 

The problem is that the teflon inside your printcore is either too short (manufactured wrong) or has decayed causing an area where pla can spread out.

 

I recommend you just throw it out and get a new core.  Maybe get a 3dsolex core from shop3d.ca (disclaimer - I sell 3dsolex cores also).