A method for calibrating a printing system including a plurality of printers includes designating one of the plurality of printers as a reference printer and defining color values for a desired response for one or more printed test patches on a control page. When a master device for the cluster fails, data may continue to be stored using redundancy, and data searches performed may still be performed. Thus, the acousto-optical baby toy presents the sound and image messages of the baby cot in a wireless manner so that the parents can operate the acousto-optical baby toy in a remote control manner to watch the instant condition of the baby placed in the baby cot. The lower portion includes a rod comprising the plurality of extensions, and a transverse space crossing the rod along its lateral axis. For this purpose, a shavings-collecting container is configured to be compressible against a flexible restoring pressure and the effect generator is pressure-operated or pressure-controlled.