I'm sorry to hear your nozzle is clogged. Maybe we can help you solve the problem here on the forum, and/or you can contact your reseller.
Please don't disassemble the core yourself. At UM HQ we have never had a print core that could not be cleaned without disassembly.
What do you mean with "During the Atomic method the temp PLA material comes out clean (no burn marks)"? You mean that you are able to extrude PLA when the nozzle is hot? That is good, at least it's not completely clogged then.
But what exactly goes wrong during the cold pull?
And what do you mean with that you used 2 different methods Atomic and cold? Cold pull and Atomic method are the same I think?
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tomnagel
Glad you solved the clog. But still interesting to know the root cause. The BB core should not clog, also not after many days of printing. However, a minimum flow is needed. How much PVA was in
Dim3nsioneer
Better keep it below 35% r.h. and never let the clogged PVA carbonize so far you cannot melt filament anymore which you push from above at print core cleaning.
gr5
There's a print core cleaning wizard? I've been using my UM3 multiple times per week for over a year and I didn't notice? Was that there when it was still in beta? I thought I went through all the
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gr5 2,224
There are many ways to clean this. The hot/cold pulls method I hear works best but I haven't had to unclog a UM3 nozzle yet (just um2 nozzles so far). Also consider contacting your reseller as most of them have probably dealt with this.
As a last resort you can take it apart. Cores are delicate and it's TRIVIAL to destroy it if you try to take it apart. Just loosening the first screw will often destroy it. I have taken many cores apart so that is very easy for me -- so if I couldn't get hot/cold pulls to work I would take it all apart and soak the nozzle in water for 24 hours.
arrgg!! I forgot - I can't post this video because it has a "8" followed by a "D" in the url and this forum can't handle that. Search youtube instead for "um3 ultimaker 3 core disassembly". That explains in detail how not to destroy your core yet still take it apart.
But again - last resort - because once you take it apart you won't be able to get reseller support for that core and I'm pretty sure it violates the core's warranty.
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