[maxgebhardt]

Originally Posted by pras870

I've actually been looking for a way to do this for the past 2 years. I have a pretty firm grasp on pnuematics from the past 2 years, but I still fail to see how this could be done

I've also found, that amazingly, pneumatics actually weigh less then a motor driven assembly. Our team has always seemed to have a weight problem, and I'm always looking for a way to incorporate pneumatics instead of motor driven for the fact that they weigh less and are actually more reliable, but I've always been under the assumption, with the materials first gives us, you can only open and close a cylinder in 2 positions (full and closed).

well the entire point of the solenoid switch is that when it is switched not only is pressure introduced in one side of the actuator, but preasure leaves the other side through the exahust valve. so if you put a solenoid to control the exhaust valve's flow, then the pressure in the actuator equalizes and the actuator stops. that is exactly how it can be multi-positioned. like I said before, just try plugging up your ehaust valve on the solenoid while the cylender is moving and it will stop mid stroke, remove the plug to let it go.