| 摘要 |
An apparatus for calibrating a tension transducer for a web includes a pair of nip rollers and a motor for driving at least one of the pair of nip rollers, the motor having at least one roller output being a function of at least one of a motor torque and a motor velocity. A web tension transducer roll is located upstream of the nip rollers, the web tension transducer having a tension output being a function of the actual web tension of the web. A processor receives the at least one roller output and the tension output, the processor calculating a tension correction value as a function of the at least one roller output and the tension output. Also provided is a method for calibrating a tension transducer for a web comprising the steps of running the web over a tension transducer and through nip rollers, the nip rollers being run by a motor, varying a characteristic of the motor and reading actual reference signals from the transducer as the characteristic is varied, and calculating at least one correction value as a function of the actual reference signals.
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