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AssigneeSiemens Aktiengesellschaft
InventorsStefan Ingo Meier, Wolf-Martin Rasenack
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A method for operating a machine for producing and/or processing a material web, wherein a first drive unit is supplied by a converter with a current, a vibration propagating over the material web is captured via the first drive unit, the vibration is measured and transformed into a measurement signal that is examined for presence of a signature that differs from the basic waveform of the current, a web tear is thus identified if the signature propagating over the material web is missing during the evaluation of the electrical measurement signal, whereby no further sensors, in particular optical sensors, are required to capture the measurement signal, and the measurement also occurs independently of a torque, a speed or speed development of drive motors over time and, moreover, the detection of the web tear does not require a comparison measurement at the machine without a continuous material web.
A method operating a machine for at least one of produce and processing a material web, the machine comprising at least one drive unit with a drive motor and a converter, the method comprising:
A control device, the control device being configured to:
Dependencies are inferred from the claim text.