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MK4/S MMU3 compatible for CoreONE  

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chandler
(@chandler-2)
Active Member
MK4/S MMU3 compatible for CoreONE

Actually I own a MK4/S with MMU3. The printer and the MMU was upgraded from MK4/MMU3 bought in Summer 2024. I have read that the MMU3 is not automatically compatible for usage with CoreONE. I am intended to upgrade my MK4/S to the latest product and I am in doubt if the MMU3 will work.

How can I find it out?

Btw, I have modded the MMU3 and do NOT use the filament buffers and original spool holders. I have a box with spring loaded filament spool holders, which are pulling back the filament during unload. In the future I would like to build the COREBOXX premium ( https://www.printables.com/model/1178997-prusa-core-one-coreboxx-premium) with the CoreONE.

Posted : 18/08/2025 2:49 pm
Protoncek
(@protoncek-2)
Trusted Member
RE:

I bought MMU3 kit for MK4S at spring, since it was way shorter wait time at that point (i wanted MMU3 for Core One though), then i installed it on Core One. You have to print some things specific for Core One and i think that PTFE tube is different length, 

This post was modified 3 weeks ago by Protoncek
Posted : 20/08/2025 12:52 pm
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