Tools Mapping and Filament Mapping (XL, MMU3)

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The Original Prusa XL multi-tool and the Original Prusa MMU3 are suitable for multi-filament printing. 

When slicing for a multi-filament object, the resulting G-code carries information on how individual materials and extruders are assigned, along with the specific material, to various parts of the object. On XL multi-tool and MMU3 (installed on MK4, MK3.9, MK3.5) it is possible to remap the materials assignment from the printer menu. 

Once the G-code is selected to be started from the printer USB drive, a thumbnail of the model is shown. By clicking Continue/Print, the Tools Mapping (XL) or Filament Mapping (MMU3) screen is opened, where it is possible to remap the extruders with the required material to a different one. 

The feature and related options work the same way across the mentioned printer models, the only change is on the name, due to the XL physically having multiple tools. 

Assigning parts of an object to a tool

To reassign one part or multiple parts of the object to a tool, navigate in the G-code filaments column to the tool you wish to reassign, select the desired tool, then navigate to the Printer tools/MMU filament column to the tool that will print the part, and select it. The printer will ask if the tool should be assigned to the object part, or if the tool should be used for the spool join functionality. 

Spool join - assigning one part of an object to multiple tools

Another use of the Tools Mapping function is assigning multiple tools for one part of the object.

In the example screenshot below, G-code filaments 3.PLA is mapped to tools 1, 4, and 2. This way, G-code filaments 3. PLA will start printing with Tool 1. If Tool 1 runs out of filament, then Tool 4 will be used. 

Filament submenu

On the main Tools Mapping screen, a Filament submenu is available. Once the submenu is opened, it is possible to load or unload filament on each tool without having to interrupt the tools mapping procedure.