Your assembled MK4S with MMU3 bundle has been calibrated and tested in our factory. However, a few easy checks are still required.
We can now move on to loading the filaments in and printing the test object! But first;
⬢Please prepare at least five different PLA filaments and cut off the ends to form a round sharp tip on each - as seen in the picture.
⬢The filaments must have a sharp tip in order to load properly into the MMU as well as into the printer. If the tip is deformed, bent or larger in diameter, it won't load properly.
⬢Inspect the last 40cm (15") of each filament. Make sure there are no dents in it. Sometimes, if filament got jammed before, the pulley wheel makes an indent in it. This part of the filament can no longer be grabbed and moved by the MMU unit and must be cut off.
⬢If the filament end is bent, straighten it. It must be perfectly straight.
Use only high-quality filament with guaranteed low diameter deviation. In case you have filament loading / unloading issues in the future, re-visit this step as well. Make sure the filament is dried up. Moisture-sensitive filaments can be problematic during the MMU operation.
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Original Prusa MK4S with MMU3 (assembled bundle) (1.0)
