A machine for making paper is diagrammed in Fig. 1.12. There are two main parameters
Chapter 1, Problem 1.3(choose chapter or problem)
A machine for making paper is diagrammed in Fig. 1.12. There are two main parameters under feedback control: the density of fibers as controlled by the consistency of the thick stock that flows from the headbox onto the wire, and the moisture content of the final product that comes out of the dryers. Stock from the machine chest is diluted by white water returning from under the wire as controlled by a control valve (CV). A meter supplies a reading of the consistency. At the dry end of the machine, there is a moisture sensor. Draw a signal graph and identify the nine components listed in 1.1 part (d) for (a) control of consistency (b) control of moisture
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