3D Simo - widening ring for better filament insertion
thingiverse
Widening the ring for improved filament insertion is key. The 3D printer's woes with TPU are well-known - it tends to slip right through, rendering the process futile. To rectify this issue, I fabricated a widening ring on the fly, increasing the thickness of the filament pressure roll in the process. Printing at a leisurely pace, 10mm every 7 seconds.
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