kelvinAI'm still scanning the old posts on Hackaday and this is an intreguing find.
It's unlikely that I'd be using this method for a custom length alternative to using belts for the main Z axis, but this method could be useful for the mini Z axis. However, such a method might not be usable due to the milling tool exerting strong forces and/or vibrations... ok nvm I just saw 1:08 and it looks pretty locked on there.
I've got all the hardware I need right here so I want to try a 3 bearing and 6 bearing solution.
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That is VERY cool looking. I'm not sure I'm sold on it for anything mission critical, but I certainly have some small projects that might benefit from the (I assume) cheaper BOM of a plain rod, and maybe once it performs well there I might trust it more.
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I just found out that someone's done a writeup with more information: https://www.patreon.com/posts/threadless-or-57786089
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