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Kind of like a Rekluse clutch for motorcycles?
Those were in use 50 yrs ago. Tapered pullys whose spacing was adjusted by spring tension and or speed. Some were by belt torque.
Not new by any means.
We have the pulley system you are talking about on our Hardinge lathe at work. The system in the video doesn't look or work anything like that, it works by the pulley actually changing size.
According to the article the pulley size is changed by digitally controlled hydraulics, not by centrifugal force or tension/torque. There may be similarities to the other systems you mentioned, I was only referring to the variable-speed belt drive you mentioned in your other post.
Side note, I've been working with a Hardinge/Omni-Turn and Bridgeport/Anilam making a small variety of tools for Swiss style screw machines for about 11yrs. I doubt that I will ever reach your level of experience due to age/time restrictions but it made me smile to see that not only were you in the same business but also used similar if not the same machines.
To me this is just a computer-controlled Reeves drive. Not a new idea, just a new control system.
I agree with Taku, CNC left us old guys out in the cold as far as price competition and time. I still enjoy making parts for myself and hobby stuff for friends. DRO is cheating! You should have to know your backlash and lead screw wear and compensate for it on the fly!