Czech 3D printer manufacturer Prusa has announced the launch of the MMU3 for the CORE One, an upgrade that enables simultaneous printing with up to five filaments. The MMU3 unit (Multi-Material Upgrade) is already known from the MK4 series and is now offered in several variants for the current CoreXY model. The aim is to produce colored objects efficiently and with minimal material loss.
Users can choose between three main configurations: a Lite Conversion Kit, the complete Enclosed version and an unofficial Community version. The Lite Kit is aimed at owners of an MMU3 module from the MK4/S series who want to transfer their existing hardware to the CORE One. The user mounts the unit on the open printer housing. The closed design is no longer required, but this is usually not critical for PLA and PETG. For more demanding materials, however, we recommend the enclosed version, which retains the closed housing. This configuration will be released at the beginning of June in several variants: as a complete kit, as a pre-assembled device or as a conversion kit for existing MMU3 users.
Technically, the design remains largely unchanged. The MMU3 unit changes filaments automatically and produces only minimal waste, which is collected in a compact wipe tower. A standard 0.4 mm brass nozzle replaces the high-flow nozzle to optimize material consumption. PrusaSlicer and EasyPrint support the workflow with tools for color assignment and automatic area filling. According to user feedback, the interaction of different materials, such as PLA with TPU, is also possible without any problems.
Prusa has also released an experimental, non-officially supported community version of MMU3. This is based on an alternative structure without a filament buffer and is fully 3D printable. Prusa provides the design files for this, but recommends a certain level of technical experience.
In the long term, the company is working on a new system for multi-material processing based on a different technical approach. A specific release date is not yet known.
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