Abstract: A method for determining the thickness of a material strip (5) when feeding the material strip (5) to the processing zone of a machine tool (1). The material strip (5) is clamped between two rotatable rollers (3, 4), whose relative position to each other in the original state with clean rollers and “zero” roller spacing was detected (reference relative position) and whose relative position to each other in the intended feed operation is determined for each feed interval (current relative position). The difference between the current relative position and the reference relative position, which gives the thickness of the strip material (5) when the rollers are clean in their original state, is corrected according to the invention for any changes in diameter of the rollers (3, 4) that may have occurred, for example, due to contamination.

Abstract: A method for operating a servo motor (10) driven turning station (5, 6, 7) of a stacking tool for a punch press includes the following steps: determining a target turning acceleration curve of the turning station (5, 6, 7) in the acceleration phase (A) of the turning increment (D); carrying out a reference acceleration run of the turning station (5, 6, 7); determining during the reference acceleration run the reference angular velocity (?ref) of the turning station (5, 6, 7); determining from the target turning acceleration curve the target angular velocity (?soll); calculating a target drive torque of the servo motor, at which the target angular velocity (?soll) results, from the relationship, known from the reference acceleration run; and accelerating the turning station (5, 6, 7) with the servo motor (10) in the acceleration phase (A).

Abstract: A method for determining the thickness of a material strip (5) when feeding the material strip (5) to the processing zone of a machine tool (1). The material strip (5) is clamped between two rotatable rollers (3, 4), whose relative position to each other in the original state with clean rollers and “zero” roller spacing was detected (reference relative position) and whose relative position to each other in the intended feed operation is determined for each feed interval (current relative position). The difference between the current relative position and the reference relative position, which gives the thickness of the strip material (5) when the rollers are clean in their original state, is corrected according to the invention for any changes in diameter of the rollers (3, 4) that may have occurred, for example, due to contamination.

Abstract: A method for operating a servo motor (10) driven turning station (5, 6, 7) of a stacking tool for a punch press including the following steps: determining a target turning acceleration curve of the turning station (5, 6, 7) in the acceleration phase (A) of the turning increment (D); carrying out a reference acceleration run of the turning station (5, 6, 7) while providing a certain reference drive torque by the servo motor (10) or while supplying the servo motor (10) with a certain reference supply current; determining during the reference acceleration run the reference angular velocity (?ref) of the turning station (5, 6, 7) when a certain turning angle is reached; determining from the target turning acceleration curve the target angular velocity (?soll), which should be present when a certain turning angle shall be present; calculating a target drive torque of the servo motor, at which the target angular velocity (?soll) results, from the relationship, known from the reference acceleration run, between the

Abstract: The invention relates to a method for operating a stamping press (1) with a ram (2) which acts against a bolster plate (3), in particular a fixed bolster plate (3), and whose ram position relative to the bolster plate (3) can be adjusted in the intended use, wherein the ram (2) carries a first die part (4) and the bolster plate (3) carries a second die part (5), wherein the two die parts (4, 5) provide associated stop faces (6a, 7a) which, when the die is completely closed, form one or more fixed stops within the die for limiting the closing dimension of the die (4, 5). In accordance with a first method according to the invention, the distance (a, a1, a2, a3) between the two die parts (4, 5) or a parameter (b1, b2, b3, c) representing said distance is monitored at a certain point (P1, P2, P3) of the ram movement in which the die (4, 5) is not fully closed, and the ram movement is changed as a function of the monitoring result.