The invention provides an electrical connection for an electric motor having a casing which houses a drive device, embodied especially a stator in a casing interior. For each brightness level within the range, the number of pixels that have the same initial brightness level is counted. The first non-apertured section and the second non-apertured section define a blanked-off section of the particle retaining space, and the blanked-off section is spaced from an end of the particle retaining space. The information database and the audiovisual display unit are in communication with the impairment profile generator and the impairment profile generator is in communication with the physical data assessment unit. The recording film contains Sb of 79 atomic % to 95 atomic % and Ge of 5 atomic % to 21 atomic % as main components, and is formed of a phase change material which does not contain the elements in the sixteenth group of the periodic table. The setpoint may also be determined on the basis of a predefined characteristic of the substrates to be aligned.