The slanted layers mean this simple block requires something like 180 filament changes while verifying the Prusa MK4 + MMU3 / filament buffer setup:
Because of all the color changes, the Wipe Tower holding the extruder waste is much much larger than the block:
The first attempt taught me, once again, the value of cleanliness:
The extruder head required tedious cleaning:
Scrubbing the steel plate with dish detergent and wiping it with isopropyl alcohol improved the outcome, but one corner of the Wipe Tower still lifted:
All’s well that ends well, but perhaps glue stick / hair spray under future Wipe Towers will ensure they don’t wander off.
The Smell of Molten Projects in the Morning 
Comments
3 responses to “Prusa MK4 + MMU3 Test Piece”
I’m surprised that the MK4 doesn’t come fitted with a silicone sock (it’s optional) as I haven’t had to degunk an extruder ever since fitting one to my MK3s a couple of years ago
After that debacle, I wrapped some silcone tape around the hot end block, snipped off everything that stuck out near the nozzle, flipped the “has a sock” config switch, and we’ll see how / if it improves the situation.
The Prusa socks seem indefinitely backordered, putting you well ahead of the power curve.
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