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Black spots in white prints with MMU3/MK4s
Hello all,
I have a problem with my MMU3/MK4s setup as I see black spots appearing regularly when printing with white filament.
At first I thought these spots came from old filament at the nozzle tip or inside the nozzle. As a consequence I am doing cold pulls every time I start a print with white filament. But this doesn't help and today I again found a black spot inside my print.
I suspect that some filament residues in the filament path make their way into the hotend and ruin my print at some point.
Does anyone experience the same or has a tip, how to overcome this situation?
Thanks in advance.
Posted : 23/02/2025 5:50 pm