A static regulator reading does not prove that sufficient pressure and flow reach the machine during a forming event. Pressure may collapse when the pressure box, pre-stretch, air eject, or another plant user demands high flow. The result can be shallow detail, unstable bubbles, or variable release.
Pressure should be logged upstream and downstream of filters, regulators, valves, and machine receivers during the cycle. A drop across one component identifies restriction; a simultaneous plant-wide drop points to supply capacity or competing demand. The measurement point must be close enough to the consumer to capture transient loss.
Line sizing, local storage, filtration, valve conductance, and leak repair should be addressed from the measured demand. Raising the upstream setpoint without checking component ratings and pressure stability is not an acceptable correction.