Flex filament not possible to load into all heads - General discussion, announcements and releases https://forum.prusa3d.com/forum/original-prusa-xl-tool-changer-general-discussion-announcements-and-releases/flex-filament-not-possible-to-load-into-all-heads/ Prusa3D Forum Discussion Board en-US Sat, 09 May 2026 14:02:36 +0000 wpForo 60 Flex filament not possible to load into all heads https://forum.prusa3d.com/forum/original-prusa-xl-tool-changer-general-discussion-announcements-and-releases/flex-filament-not-possible-to-load-into-all-heads/#post-708097 Thu, 18 Apr 2024 07:17:49 +0000 When loading a Flex (Torwell 92?) filament, it cannot be loaded into heads (1,3,5), but it works well for heads 2 and 4. The filament is pushed into the wider upper metal part of the nozzle correctly, but then the filament starts slipping on nextruder wheel and does not continue to the lower hot-end.

I've tried stretchen nextruder springs, increase the nozzle temperature up to 280C, no success so far. Looks not all nextruders are the same :(.

Are there any other suggestions to improve the loading of flex filament?

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