The instrumented bars designed and patented by Arcelor Research enable precise
calibration of the actuators (roll-gap, transversal and longitudinal tilting
and back-up rolls) of levellers. The calibration procedure requires to stop
the cut-to-length line for 30 minutes to calibrate the leveller, if no major
mechanical operation is necessary. The measurement device will guarantee the
pre-setting validity and the longevity of the leveller.