[bharrison6]

Was wondering if you did the setup with the compressor and regulator off the robot and filled your tank with 60 psi through the off-board regulator and had the cylinders extended. You then disconnect the off-board compressor/regulator and just have your tank, 120 psi relief valve and cylinders. You then retract the cylinders through mechanical means which effectively decreases your total volume and increases your total pressure. There is no pressure gauge to read this increase in pressure but I am thinking it might break the "working" pressure rule. But maybe not?

If yall think it does then does it fall in the category of "closed" loop Pneumatics which do not have psi limits?

Thanks for the replies.