Loading aid for the MMU3 buffer segment R3

Threading the filament into the buffer is still very awkward for me. You have to remove the segmenter, thread the filament around the roll and then push it up to the MMU, start the loading process of the MMU and then reinstall the segmenter in the buffer.

There are a few solutions to simplify the loading process in the segmenter, but they seemed too complicated to me and were not compatible with my desire for a buffer that was as airtight as possible.

So I came up with the idea of installing a roller shutter in the segmenter that could be closed for the filament loading process. After a few attempts, I managed to find a working solution that allows the filament to be pushed through to the MMU in loading mode.

Once the filament has been loaded into the MMU, the roller shutter is opened again and the filament can be pushed into the buffer during the unloading process of the extruder.

Hints:

• PETG is best for printing
• Layer height 0.2mm / 0.4mm nozzle
• Use quality setting for more precise printing
• The guide slot for the closure can be greased with a little grease from the Prusa maintenance package. This increases the ease of running.

This upgrade simplifies the insertion of the filament into the buffer. The segmenter no longer needs to be removed. The design of the segment-R3.stl has been extended to include a cap that makes it easier to load the filament.