Blind rivet setting device and method for setting a blind rivet

A blind rivet setting device comprising:

• a housing;
• a pulling mechanism arranged in the housing;
• an electric motor structured and arranged to move the pulling mechanism in a pulling direction out of a rivet receiving position;
• a control device, which is structured and arranged to control the motor, comprising a tear-off detection device that monitors current or electric power drawn by the motor to generate a mandrel tear-off signal when a pulling mandrel is torn off;
• and
• an operating device that is connected to the control device;
• wherein, when the mandrel tear-off signal is generated, the control device is configured to stop the driving of the pulling mechanism in the pulling direction, and
• wherein the tear-off detection device comprises a current monitor structured and arranged to constantly ascertain a current fed to the motor, which includes a maximum value and an intermediate maximum occurring prior to the maximum value, and to generate the mandrel tear-off signal only when the current, after reaching the maximum value, drops at least by a predetermined percentage of the maximum value within a pulling movement of less than 1 mm,
• whereby the tear-off detection device does not detect the intermediate maximum as the maximum value.