this post was submitted on 06 May 2024
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Something I don't quite get: it seems like this would grind the shit outta any surface it comes in contact with (or, be ground to shit if whatever's on it is harder than the material of the cone thingies).
Does anyone have any idea how the constant abrasion is mitigated? Or is it somehow just not that big a deal, like it doesn't actually chew chunks outta (for example) shoe soles?
It doesn't grind anything basically the same way a treadmill doesn't sand anything. You're not forcing anything to stay put on the surface, you're maneuvering on the surface while the surface is counter-moving you.
MKBHD's video shows it moving him around on a chair, spinning the chair, etc etc. In the closeup shots, it looks like there's debris on the surface of the cone thingies:
The debris isn't uniform and is quite obviously not part of the roller material; I just kind of assumed that it was from stuff they'd been testing on it, though I suppose it could be generic workshop crud that fell on the rollers too 🤷
There's probably very minimal sliding against that surface. From the point of view of each point of contact, it's mostly static friction, with very little dynamic friction/slippage.