eli5, How can things like tankturrets and excavators spin?

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Is there not like a bunch of electronic components that would get twisted and ruined of they just kept spinning? Or is there a limit to how many rotations they can do before needing to counterspin?

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Anonymous 0 Comments

When I worked with some Armoured Fighting Vehicles some years ago, the signals from below passed upwards to the rotating turret via slip rings, basically two facing conducting circles connected by conducting fingers. There was no limit to the number of rotations in any given direction.

I don’t recall the exact mechanics of the solution (how the turret was permanently affixed to the body) but the electronics were essentially separated via the slip rings.

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