Nozzle Differences

[cosmicfugue 0]

What is the differences between AA and BB nozzles. Can I use AA 0.4 mm nozzle with BB 0.4 mm print head?

[SandervG 1,521]

Hi @cosmicfugue, thank you for your post. The AA print core is developed to be used with 'building material' like PLA, Nylon etc. And the BB core is developed to be used with the support material PVA. But what is the difference? The difference lies in the nozzle design. PVA has the tendency to burn more quickly in the nozzle and consequently clog it. So we needed a special design for it. You can see our solution on this image:

 

As you can see the AA nozzle has 'shoulders' on the inside, this helps to prevent oozing. But this would also be where PVA would be collected, burn, and clog the nozzle. So the BB print core doesn't have those shoulders. That means if you would run PVA in an AA print core, you most likely get clogs. If you run any other material in the BB print core, you most likely get more oozing than normally due to it not having any 'shoulders'. Hope this helps! 

[cosmicfugue 0]

Thank you for your information.

 

As far as I understand, I can manage with AA nozzle until I get a new BB nozzle. Of course, provided that it is cleaned as long as there is a clog.

[SandervG 1,521]

I would not recommend printing PVA with an AA print core, but other materials you can (unless they're abrasive). Cura will also give you an error / blocking warning when you try to slice a file with PVA assigned to an AA print core. It is a guarantee your nozzle will get clogged. 

[cosmicfugue 0]

I am aware that the device has a print core recognition system. I was talking about attaching an AA nozzle (just the gold colored piece at the end) to the BB print core.

[SandervG 1,521]

Thank you for your response. Do you have original print cores or do you have any third party products like from 3DSolex? If you have original Ultimaker print cores, without any special tools and knowledge you can not safely remove/replace the nozzle (gold colored piece). The Ultimaker print cores are not meant to be taken apart. There is a chance you might damage the print core or not insert the new nozzle correctly and creating a chance for leakages. 

 

Third party products like 3DSolex do have print core 'clones' with detachable nozzles. It has its own set of risks and advantages. @gr5 might know more if you have any questions about it!

 

Hope this helps! 

[cosmicfugue 0]

Since the print core is already damaged, I have already removed parts of it without breaking the printcore.

 

I just need that part in the blue circle.

 

[SandervG 1,521]

16 minutes ago, cosmicfugue said:

Since the print core is already damaged, I have already removed parts of it without breaking the printcore.

 

I just need that part in the blue circle.

 

 

Unfortunately, since the printcore is not meant to be taken apart of assembled, we don't sell them separately and I think a reseller also doesn't have any. They all have assembled print cores.