Device and method for controlling the tension of a substrate web
First Claim
1. Device for controlling the tension of a substrate web that is conveyed along a transport path, the device comprising:
- a first driving unit with a first driving roller around which a substrate web is partially guided and tensioned;
a second driving unit with a second driving roller around which the substrate web is partially guided and tensioned,with the first and the second driving units featuring different rotational moments of inertia;
a measuring unit for delivery of a measured value of the tension of the substrate web;
a control unit in connection with the measuring unit and the first and second driving units, the control unit comprising a first and a second filtering unit displaying different filtering characteristics for filtering the measured value,the control unit comprising a first control device for controlling the first driving unit based on the measured value filtered by the first filtering device, as well as a second control device for controlling the second driving unit based on the measured value filtered by the second filtering device.
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Accused Products
Abstract
A device for controlling substrate web tension includes first and second driving units with respective driving rollers around which the substrate web is partially guided and tensioned. The first and second driving units have different rotational moments of inertia. A measuring unit measures the tension of the substrate web. A control unit has first and a second filtering units with different filtering characteristics for filtering the measured value. The control unit includes a first control device for controlling the first driving unit based on the measured value filtered by the first filtering device, and a second control device for controlling the second driving unit based on the measured value filtered by the second filtering device.
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Citations
14 Claims
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1. Device for controlling the tension of a substrate web that is conveyed along a transport path, the device comprising:
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a first driving unit with a first driving roller around which a substrate web is partially guided and tensioned; a second driving unit with a second driving roller around which the substrate web is partially guided and tensioned, with the first and the second driving units featuring different rotational moments of inertia; a measuring unit for delivery of a measured value of the tension of the substrate web; a control unit in connection with the measuring unit and the first and second driving units, the control unit comprising a first and a second filtering unit displaying different filtering characteristics for filtering the measured value, the control unit comprising a first control device for controlling the first driving unit based on the measured value filtered by the first filtering device, as well as a second control device for controlling the second driving unit based on the measured value filtered by the second filtering device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Method for controlling the tension of a substrate web, wherein the substrate web is at least partially guided and conveyed around one first and one second driving rollers that feature different rotational moments of inertia, the method comprising:
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measuring the tension of the substrate web and generating a measured value as a function of the tension; parallel filtering of the measured value in a first and in a second filtering unit displaying different filtering characteristics; controlling the first driving unit as a function of the measured value filtered by the first filtering unit; and controlling the second driving unit as a function of the measured value filtered by the second filtering unit. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification