[Concept] Nutty drive

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3 Responses

  1. Erik says:

    Alternatively, the alignment holes could contain filament to get a tension that is paired with the filament that is pushed through (though about 3 times stronger). Then you don’t even need to have tensioners, just epicentric nuts. Just one of the discs should have teeth (a gear), the other ones could be round. They could be held by 3 skate bearings.

  2. Renoir says:

    Nice idea. I think it might cause the same problem as a small nut – causing the filament to rotate. Because there is only intermittent contact between the filament and the nut, there isn’t a continuous thread cutting into the filament – more like a scraping downwards every rotation. Not saying it won’t work, though. As usual, the only way is to build one to find out…:-)

    p.s. After thinking about Forrest’s idea, you could use a coupling nut to get a nice long threaded section. Re-cutting a sharp thread with a die might also help too.

  3. Julius says:

    In the BfB-design is also some bolts in the gears, and they are put on the side… This is to prevent sliding of the nut and loosening the tensioner.