[Trying to fix our school's Original+, cannot figure out what's going on with our hot end....]

There's something I don't understand. On your photo I can see threads of the barrel.

Are you sure you didn't install it in on the opposite direction??

 

Oh yikes! May be! I will definitely look into that. Good catch - thank you so much!

[Trying to fix our school's Original+, cannot figure out what's going on with our hot end....]

I would try some other filament that you know to be 'fresh' (I have had this happen on older filament).

 

Yep...have done that too.  I'm kind of leaning towards just replacing the hot end and starting fresh....

[Trying to fix our school's Original+, cannot figure out what's going on with our hot end....]

Are there teeth marks on the filament? There should be some diamond shapes pressed into the filament from the feeder gear wheel. The most common problem I see with new UMO users is they don't latch the feeder properly causing no tension to be put onto the filament.

 

Yep!  Tension looks good on the feeder, and we've been loading it correctly.  Good thought, though!  I can totally see how that's a common issue with us newbies

[Trying to fix our school's Original+, cannot figure out what's going on with our hot end....]

Did you tighten the peek/barrel with all assembled and hot? Is possible to over tight it and deform slightly the peek inner screw. This makes more pressure on the ptfe coupler, making its like span shorter. I would take out the ptfe coupler and check the tip for deformation.

 

I did tighten it when it was hot. My next hunch was to replace the PEEK, if not the whole hot end to start new.

Just put in a new PTFE coupler, so that's not the problem.

[Trying to fix our school's Original+, cannot figure out what's going on with our hot end....]

Thank you so much for responding!

 

How many atomics done? Maybe is just some left particles of other filament or dirt. I would keep doing stomics until they come clean. Also maybe, if is abs debris, it might need an atomic with abs or with nylon.

Have done at LEAST 10 over the past few days.  Have only ever used high-quality PLA with this printer.

 

Could you post photos of the hotend to see if there's something wrong? Also double check that the bowden doesn't pop and is fully inserted into the ptfe coupler.

We had an earlier issue with molten PLA oozing on top of the heater block. Per suggestions here, heated the block until the PLA was pliable and scraped it off.  After tightening the hot end isolator tube (while the block was warm) seemed to fix the leak.  Still have some PLA lingering around the assembly - planning on working on this later

Bowden is fully inserted when assembled.  If it gives you (or anyone else) any additional clues, when we do a test print, the first few layers come out just fine, but get progressively spaced out and messy before the printhead stops extruding all together. Example below:

Thanks again for problem solving with me.  We are so frustrated at the moment...

[Trying to fix our school's Original+, cannot figure out what's going on with our hot end....]

Hello, all! Complete and total novice here, at my wit's end after working on our printer for hours! We have an Original+ in our makerspace that our students (5th and 6th graders) are DYING to use, but I cannot seem to figure out this problem....

Below are pictures of filament after attempting the atomic method several times. As you can see, the tip is coming out clean, but the filament seems to be melting/burning above the extruder head. I am using the exact temperatures specified for the atomic method and am making sure to pull the filament straight up when it has cooled. We had an issue earlier in which the nozzle clogged and melted filament collected at the top of the heater block, which has since, to the best of our ability, been cleaned up.

Pictures of our current issue

So far, I have tried:

 

[*]Replacing the aluminum heater block

[*]Replacing the hot end isolator coupler

[*]Adjusting the tension on the feeder wheel

Does this look like an issue with the hot end isolator tube, the peek isolator, or the nozzle? We're stumped at the moment :(