A method for sensing the supply current of a switched DC-to-DC converter is discussed. The transmission band body has a lengthwise direction and a widthwise direction. A suitable non-sludging lubricant of low surface tension is held in a porous reservoir within the stationary portion of the bearing. By this means the UCM exercises indirect control of the sun-roof in accordance with the state of a switch, and exercises indirect control of various lamps GEN1, GEN2, FLL and FRL in the roof housing in accordance with the state of switches Gen, FL and FR mounted in the roof housing or, in the case of the lamps GEN1 and GEN2, when a vehicle door is opened. A host computer is provided with a spool file manager for calculating the relative position of the logic page to the physical page, and a despooler for processing the layout data, obtained by enlarging or reducing the logic page, to a data format matching the graphic engine.