Solution: Variable position of cylinder in compliance with <R74>

[Roboman01]

that's what this is.

Precisely. After all, that was the entire point of the schematic...

[cjwmam]

Are you sure it's a center pressure valve? Also, when you were moving the cylinder, did you need to adjust the regulator to change the position of the rod, when it was not at either extreme?

Yes it is center pressure valve, I started with closed center but could not dump all air from system so went to presure center. once set you do not need to adjust regulator. you can stop & start at any point. up or down the stroke with only powering silonoid on one side or the other

[Roboman01]

Originally Posted by cjwmam

Yes it is center pressure valve, I started with closed center but could not dump all air from system so went to presure center. once set you do not need to adjust regulator. you can stop & start at any point. up or down the stroke with only powering silonoid on one side or the other

I see. Still, that is an improper application of a center-pressure valve, as my previous post stated. You could easily blow out your regulator with that setup. According the the Norgren Pneumatics Manual, the only way to properly jog a cylinder is to use a closed-center valve.