[Mike Betts]

Originally Posted by reilly

How can we control the output of two cylinders in opposite directions continously?

We are using two Festo solenoid valves right now. We got them to go in reverse of each other: for example say piston A goes in , and piston B goes out but this happens only once unless we manually reverse the tubing to the exhaust [2 to 4].

I'm not sure I understand your problem... Try this... Use one Festo. put a T connector at both its port 2 and port 4. Now hook one of the port 2 outputs to cylinder A front and the other to cylinder B back. Hook one of port 4 outputs to cylinder A back and cylinder B front.

See is that does what you want... If not, please describe what you are trying to do in more detail.