According to one method, a floor panel (2) is inserted between a sheet holding transport
assembly (7) and a sheet pressing transport
assembly (8, 9); the floor panel (2) clamped between the moving sheet-like holding transport
assembly (7) and sheet-like pressing transport assemblies (8, 9) performs a feed movement by a linear movement; the
cutting heads (10, 11) are rotated about the axes of rotation (X1, X2) and parallel grooves (17, 21, 22) are machined in the lower side (12) of the floor panel (2) using a feed movement imparted to the floor panel (2) by the sheet-like holding transport assembly (7) and the sheet-like pressing transport assembly (8, 9). The
machining of the parallel grooves (17, 21, 22) is performed in the lower side (12) of the floor panel (2) by means of a
cutting head (10, 11) comprising a set of axially separated profiled disc-shaped cutters having a stepwise varying
diameter, when the axes of rotation (X1, X2) of the spindles (23, 24) of the
cutting head (10, 11) are inclined at an angle (+ alpha,-alpha) with respect to the plane of the lower side (12) of the floor panel (2) being machined, the cutting head (10, 11) being rotated by the axis of rotation (X1, X2) of the spindles (23, 24) of the cutting head (10, 11) at an angle (+ alpha,-alpha). The
machining of the parallel grooves (17, 21, 22) is carried out.