A rolled sheet may not be sufficiently flat as it leaves the roll gap, due to factors
such as variations in the incoming material or in the processing parameters during
rolling. To improve flatness, the rolled strip typically goes through a series of
leveling rolls. Several roller arrangements are used, as shown in Fig. 13.7. The workpiece
is flexed in opposite directions as it passes through the sets of rollers. Each roll
usually is driven separately by an individual electric motor.