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I have a circular saw cutter in a tube. The cutter is supposed to cut a gap into the metal tube by cutting in a spiral motion. Initially I wanted to make it fancy and show the material that is cut fall down. But right now I would even be happy with the cut material simply disappearing into thin air. I got the shapes and animation set up. I just need help with the interaction part.

Bottom view of the cutter + tube: http://prntscr.com/nagruw

The spiral path that the cutter follows: http://prntscr.com/nagr9f

I have tried to make the tube softbody, but the pieces do not fall down or disappear and it was way too wobbly for metal.

I have tried using using boolean difference modifier on the tube, with the object being a spiral shaped mesh using screw modifier: http://prntscr.com/nagugo. But somehow the boolean did not work properly (although it did work with a sphere as object).

I only started tinkering with blender since 4 days ago so I am a complete beginner, but I have watched a tens of videos over the past 2 days just to solve this issue. Yet I am no closer to getting what I want, so I came to this site.

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