According to the method, a floor panel (2) is inserted between a lamellar retaining transport
assembly (7) and a lamellar pressing transport
assembly (8, 9); the floor panel (2) clamped between the moved lamellar retaining transport
assembly (7) and the lamellar pressing transport assembly (8, 9) is subjected to a feed motion through linear movement; a
cutting head (10, 11) is put into a rotary motion around axes of rotation (X1, X2) and parallel grooves (17, 21, 22) are machined in the underside (12) of the floor panel (2), using the feed motion imparted to it by the lamellar retaining transport assembly (7) and the lamellar pressing transport assembly (8, 9). The
machining of the parallel grooves (17, 21, 22) in the underside (12) of the floor panel (2) is performed with the
cutting head (10, 11) comprising a set of axially separated profile disc cutters having stepwise-changing diameters, the
machining of the parallel grooves (17, 21, 22) being performed when the axis of rotation (X1, X2) of the spindle (23, 24) of the
cutting head (10, 11) is inclined at an angle (+α, -α) relative to the plane of the underside (12) of the machined floor panel (2).