Quick question for those more experienced than I. First a little background. We have a part that is being revived by the customer and the process that existed before switched from 1st stage to 2nd stage on machine pressure (not a cavity pressure sensor) instead of a stroke. We are having some issues with the part so I was asked to look at it. It is set to switch at 1400 PSI (Hydraulic). When I went to look at it I switched back to stroke as it seemed to be over packing the parts. Normal decoupled method had the peak pressure at about 400-450 PSI (hydraulic). The DOE I was running was to determine what was causing some issues with concentricity.
Now here is the questions. I haven't dug to deep on it and no one has given a good reason yet as to why it was originally run this way. Anyone have any insight as to why you would set up a machine to switch on machine pressure and not stroke?