System of rolls in a supercalender

A supercalender comprising:

• an upper roll,
• a lower roll, and
• at least one intermediate roll between the upper roll and the lower roll and having a roll shaft,
• the upper roll being a stationary variable-crown roll having a roll shaft, a roll mantle having two opposite ends, bearings supporting the roll mantle at its opposite ends relative to the roll shaft and preventing displacement of the mantle ends in the radial direction relative to the roll shaft, and multiple independently actuable hydrostatic loading elements intermediate the ends of the roll mantle and acting in a direction towards the lower roll,
• the lower roll being a floating variable-crown roll having a roll shaft, a roll mantle, and multiple independently actuable hydrostatic loading elements supporting the roll mantle on the roll shaft and acting in a direction towards the upper roll and said hydrostatic loading elements of said lower roll generating measurement signals corresponding to the loading on said rolls,
• and the supercalender further comprising:
• position detectors at the ends of the roll shaft of at least one roll generating measurement signals corresponding to a position of said roll shaft of said one roll, and
• control means for controlling a supply of hydraulic fluid to the hydrostatic loading elements in response to measurement signals received from the position detectors and from the hydrostatic loading elements of at least the lower roll.