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foehnsturm

UM2+ feeder and (soft) flexible filaments slipping

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I've been testing an upgrade which closes the gap between the knurled wheel and the bowden entry completley to avoid any filament tangling. In doing so, I noticed that Recreus Filaflex (which is quite soft) will start to slip at some point, even with the highest possible idler pressure. You can even pull it out by hand with some - but not excessive - force. It looks like the filament squeezes so much that there's not enough contact pressure.

Anyone noticed the same thing?

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