How do machines like MRI that use large freely rotating pieces with sensors and tools attached deliver power and send/recieve data, I don’t think they would have miles of cables on a spool thats ready to be wound back and forth?
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Electric contact pads, they aren’t as efficient as a cable but they work well.
In the inside there is a pad with a wire attached to it and the same on the outside, these pads are touching but not glued or soldered.
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