Nozzle completely clogged

[zephirl 0]

Hey,

I've tried to print with 1.75mm and since then, every time I want to print something, I have to do the atomic method in order to unblock the extruder/nozzle.

Unfortunately, now the nozzle/extruder is completely clogged which means that, after removing the bowden tube and the four screws, when I try to force push some filament directly in the extruder, nothing moves. I think there might be some plastic stuck right before the hot nozzle, is blocked there, and cannot be pushed.

Does anyone have a solution to this problem? I need to print a couple of things for my presentation next thursday and my ultimaker 2 needs to be able to print it ASAP,

Thanks,

Zephir

Edited March 18, 2017 by Guest

[neotko 1,417]

Well, your coupler looks quite deformed. Have you check the tip of the coupler for brown/burns/not being a perfect circle anymore

https://ultimaker.com/en/resources/19619-ulti-evening-maintenance

If so, think about upgrading the coupler to tfm + spring replacement to a fixed size spacer (any UM reseller has them).

Edited March 18, 2017 by Guest

[neotko 1,417]

Also, using 1.75 on a 2.85 hotend never delivers the best quality...