Vorrichtung bzw. Steuerung für eine Vorrichtung zum Ansetzen von Nieten

摘要

The invention relates to a device for fitting rivets, buttons or the like in textiles or the like with a ram driving the rivets, the upward and downward movement of which is controlled by the co-operation of the upper end of the ram with a cam rotated by an electric motor. When a switch or the like is operated, the device performs a series of fitting movements, the electric motor (39) which runs at a preset angular speed being stopped briefly at the top dead centre position of the ram (24) to reduce the beat frequency of the ram stroke. To this end the control unit switches the drive motor (39) off at the top dead centre position of the ram for a pre-programmed dead time and switches it on again and actuates a brake especially during the dead time.