Method and apparatus for achieving a fast cross direction caliper control recovery time

摘要: Fast cross direction caliper control recovery time in a sheet making machine during startup of the after break is achieved provided that preselected duration measured from occurrence to clearing, has elapsed. One or more three operations, namely, open loop calender stack conditioning, conditioning measurement sensor for measuring and closed change set tuning parameters PI controller providing feedback actuators associated with, can be selectably performed. The operations have an order precedence. first second performed concurrently if selected both are identical, before third selected.