A method in a sheet metal working center, wherein a sheet secured to mounting member of a moving carriage arrangement is transferred in accordance with a predetermined program substantially in XY orthogonal coordinates in the main plane of the sheet so that machining of the sheet may be carried out by multiple machining units. At least two of the machining units are placed in the sheet metal working center and have separate XY orthogonal coordinates, and directions X of the separate XY orthogonal coordinates of the machines are combined to a common direction X of the sheet metal working center.
