Patent ID: 8790495

Claim:
A conservation control method for integration with a feedback cross-machine direction control system, the feedback cross-machine direction control system includes a cross-machine direction controller and a cross-machine direction profiler operable to directly modify the properties of a web being produced in the machine direction, said web properties measured and modified after the formed web has exited a headbox, said conservation control method comprising: receiving an error profile representing a web property, said error profile including a plurality of cross-direction zones; receiving a first cross-direction set-point array from the feedback cross-direction controller, said first cross-direction set-point array including a plurality of first set-point values, each said first set-point value correlating to one of said cross-direction zones; determining a performance band; creating a decision array having a plurality of decision array values, where each said array value correlates to one of said cross-direction zones, and for each cross-direction zone if said error profile is outside said performance band, said decision array value correlating to that cross-direction zone is set to accept and if said error profile is inside said performance band, said decision array value correlating to that cross-direction zone is set to reject; creating a modified cross-direction set-point array, said modified cross-direction set-point array including a plurality of modified set-point values, each of said modified set-point values correlating to one of said cross-direction zones, wherein for every cross-direction zone labeled accept in said decision array, the corresponding modified set-point value is set to the first set-point value correlating to that cross-direction zone and for every cross-direction zone labeled reject in said decision array, the corresponding modified set-point value is set to a previously stored set-point value; and transmitting said modified cross-direction set-point array to the cross-direction profiler.