I'm considering a potential product but I'm not sure about the core technology I'd need.
The fundamental idea is that there would be a cable (or something similar) that would be pulled. But as it was pulled with X force, the device (mechanically and/or electronically) would provide equal (but slightly less) resistance.
So if it's pulled with 10 pounds, it would respond with (for example) 9 pounds of resistance (so the net result would the cable moving at 1 pound pressure).
But it would also need to react in real-time (more or less instantly), as the pull force would be constantly changing.
Is there already some kind of device that does that I'm not an engineer, more on an entrepreneur, so I'm a bit out of my depth here. Thanks!