초록 ▼

A control device for guiding edges or a centerline of a material web which moves over rollers utilizes the difference between a desired position value and an actual position value, which actual position value is multiplied by a signal corresponding to the speed of the material web. A control signal

A control device for guiding edges or a centerline of a material web which moves over rollers utilizes the difference between a desired position value and an actual position value, which actual position value is multiplied by a signal corresponding to the speed of the material web. A control signal is generated which is applied to a control element to reposition the web to obtain the desired positions for the edges or centerline. To make the control hunting-free, the error signal, formed of the actual value measured at a predetermined location, and the desired value is multiplied by the speed of the web and is delivered to a first control circuit for stabilization. A second control circuit, subordinate to the first, is provided between the output of an integrator and the correcting element and this second circuit comprises a position controller for the correcting element for receiving error signals which are formed of the output signal of the integrator representing the desired value, and the actual value of the correcting element.

대표청구항 ▼

A control device for continuously controlling the position of a material web which is guided over at least one roller in a controlled area, comprising: position correcting means engaged with the web at a first location of the controlled area to reposition the web in the controlled area; actual posit

A control device for continuously controlling the position of a material web which is guided over at least one roller in a controlled area, comprising: position correcting means engaged with the web at a first location of the controlled area to reposition the web in the controlled area; actual position sensing means for continuously sensing the actual position of the material web in the controlled area to generate an actual web position signal; speed sensing means for continuously sensing the speed of the web in the controlled area to generate a web speed signal; a difference unit having a desired web position signal and connected to said actual position sensing means for obtaining a difference signal corresponding to a difference between the desired web position signal and the actual web position signal; a multiplier connected to said difference unit and said speed sensing means for multiplying said difference signal by said web speed signal to obtain a corrected difference signal; and circuit means connected to said multiplier and said position controlling means for controlling said position correcting means in accordance with said corrected difference signal to reposition the web.