I worked with several companies (Epson and xerox) with some microfluidics projects.
Sounds like a player piano!The closest I ever came to it was with a Moog Hydrapoint milling machine. It used compressed air to read the mylar punched tape to define machine position. The air pressure was then applied to air to hydraulic transducers which ported hydraulic oil to move pistons in a hydraulic cylinder. The cylinders were side ported with switch plates. The plates were stacked and moved individually to open a specific position along side the cylinder. The piston would move to a point that it would cover the open port. A buildup of pressure would indicate that the position had been reached and the next portion of the program would be activated.
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