W. Schlafhorst Ag & Company

Norbert Veit

Heribert Kargel

The method and apparatus optically scan the size of a yarn package of a spinning bobbin with a plurality of light transmitters and light receivers and derive defined control processes in accordance with the ascertained size. Bobbins with yarn packages are moved in a given direction of motion at a predetermined speed between a plurality of paired and mutually opposite light transmitters and light receivers disposed one above the other with respect to the given direction of motion for placing at least some of the light receivers into a shadow. At least one of the light transmitters and light receivers are switched on and off in cycles at a predetermined rhythm, order and duration. A signal is delivered to a computer from each of the light receivers placed into a shadow in each cycle by the bobbin. The volume of the applicable bobbin is calculated with the computer from a given time required for scanning one bobbin and from the signals from the shadowed light receivers delivered during the given time. The volume of the tube of the bobbin is subtracted from the volume of the bobbin for determining the volume of the yarn package. Defined control processes are derived and the bobbins are assigned to at least one of specific work stations and specific method steps, as a function of the volume of the yarn package.

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Monchen-Gladbach, Germany

Norbert Veit