Print core nozzle replacement

[kjmsnpi 0]

Hi,

 

I wonder if I could replace print core nozzle because the nozzle is clogged with scorch that cannot be removed.

Is it possible to replace the nozzle with a generic nozzle like this link.

https://www.amazon.com/4-Pack-Printer-Ultimaker-Extended-Ultimaker3/dp/B07Y1SLDQM

 

I wish I had the right nozzle for PVA, but in the first palce, what is the difference between AA core and BB core?

 

Best regards,

Shimpei

[glx 27]

Hello,

The difference between AA and BB cores is the internal nozzle geometry, there's some more detailed explanation (and a video on how to swap nozzles) here: Difference between AA 0.4 and BB 0.4 nozzle - UltiMaker 3D printers - UltiMaker Community of 3D Printing Experts

 

The only replacement nozzles I'm aware of are from Microswiss: Micro Swiss Brass Plated Wear Resistant Nozzle for Ultimaker 3 / Ultim — Micro Swiss Online Store (micro-swiss.com)

I did swap a few nozzles, once you're used to it, its no big deal, but be aware of the risks of cracking the thin heatbreak or having a leaking core because it wasn't tightened up enough. 

So far I didn't come across an uncleanably clogged BB core, with enough temperature and patience I could resolve all of my clogs up to now.

[kjmsnpi 0]

Thanks for your reply, glx.

 

Microswiss core nozzle can be used as BB core?

When the print core is stacked, I usually remove nozzle and clean it up with heatgun.

 

[gr5 2,210]

Those ones that you linked to should work.  They're from a 3rd party seller in china I think.

 

These are not UM approved nozzles and may not be quite as good - for example it actually matters how smooth the bore of the nozzle is - how rough the tool marks are.  Here's an old video I made on how to take apart your UM core:

 

 

 

[gr5 2,210]

Also if you buy a print core from 3dsolex.com then it's easy to change nozzles - they are designed to be changed from one print to the next.