Broke my 3D printer Fixing it.

That’s it right there!    The cause of all my 3d printing troubles for quite a while.

It’s not just a clogged print head.. it looks like a burnt out clogged printhead.

I own an Ultimaker 2..   and have gotten many really great prints out of it… but every now and then I get a nozzle clog problem… which makes the prints really bad.

Short of taking the printhead apart… there is a method to clear a clogged nozzle by heating it up, manually pushing a piece of filament in, cooling it down and yanking it out hard…    It is supposed to pull out any crud stuck in the nozzle and eventually after repeated tries you should get a cone shaped end on the filament when you pull it out…     The problem with mine is it would never come out cone shaped…

What would happen is the filament would break right at the entry to the nozzle…    Sure.. messing with it for an hour and I can get a few nice prints out.. but then it clogs up again..

Today I spent several hours with it.. What was happening is I could clear the nozzle so plastic flows.. then it gets stopped up again and no plastic would flow no matter how hard you push on the filament.     So i assumed there is a piece of something non-meltable that is floating around in there and eventually it falls into place and blocks the flow…

Tonight I bit the bullet and took the print head apart…  Had I gotten it out right.. I could have cleaned the obstruction.. but as it is.. I broke the temperature probe trying to get it out of the printhead…  It was frozen in there…

Anyways now I see why I never got a cone shape… the inner surface of the passage way through the nozzle is coated in carbon — burnt plastic…    since it has an irregular shape no amount of pushing and pulling would pull out the plastic in the nozzle.

Anyways… I was on the fence about ordering an upgrade kit that upgrade my printer to the next model up — the Ultimaker 2+…

I just ordered it.    The upgrade kit comes with a new printhead…   and the big thing about that is it has removable nozzles…  You can use different size nozzles, and presumably it makes it easier to clear bad clogs because you can take the nozzle off without taking the print head apart.

 

 

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