Prusa CORE One MMU3 Community version

Here is my take on the Prusa CORE One MMU3—introducing the Community version! This setup mounts the entire MMU3 unit directly on top of the printer, with an integrated buffer and spool holders.

In addition to the printed parts (you'll need around 4.5 kg of filament), you’ll also need some extra fasteners (see the table below) and a longer MMU cable to connect the MMU3 unit to the CORE One. Be sure to check the parts list and notes before starting your build.

Keep in mind, this is still a work in progress, and some tweaking may be needed to get everything dialed in for your specific setup.

Instagram build: https://www.instagram.com/p/DLS4avPN_VN/

Facebook build: https://www.facebook.com/reel/691513363857612?locale=cs_CZ

X build: https://x.com/PrusaGuy/status/1937591092381376741

Tik Tok build: https://www.tiktok.com/@prusaguy/video/7519596245304839446

A Note on Future Development
I am excited to release it to the community and encourage users to take it forward, creating remixes, improvements, and new attachments. I look forward to seeing what you create! However, I want to be transparent that neither I nor anyone else in the Prusa team will be actively developing or maintaining this model, as we are focusing our efforts on the next generation MMU system, which is completely different.

Print instructions

Download the latest PrusaSlicer and use the following settings**:

• Print settings: 0.20mm STRUCTURAL
• Filament: PETG (tested on Prusament)
• 15% Grid infill

** Note that print settings are recommended, but you can experiment with your own.

The prints were tested on the Prusa CORE One.

Required fasteners:

*Before using the MMU3, set the correct PTFE tube length (390 mm) in the printer menu under Settings → Hardware → MMU → Front PTFE Length. This setting is available in firmware version 6.3.3.

Other parts required:

MMU3 cable (longer version) - https://www.prusa3d.com/en/product/original-prusa-mmu3-community-version-cable-for-core-one/