Page 231 - Sensors and Control Systems in Manufacturing
P. 231

CHAPTER 4





                                                         Networking of



                                                            Sensors and


                                                     Control Systems



                                                    in Manufacturing








                     4.1 Introduction
                          Central to the development of any computer-integrated manufactur-
                          ing facility is the selection of the appropriate automated manufactur-
                          ing system and the sensors and control systems to implement it. The
                          degree to which a CIM configuration can be realized depends on the
                          capabilities and cost of available equipment and the simplicity of
                          information flow.
                             When designing an error-free manufacturing system, the manu-
                          facturing design group must have an appreciation for the functional
                          limits of the automated manufacturing equipment of interest and the
                          ability of the sensors to provide effective information flow since these
                          parameters will constrain the range of possible design configurations.
                          Obviously, it is not useful to design a manufacturing facility that can-
                          not be implemented because it exceeds the equipment’s capabilities.
                          It is desirable to match automated manufacturing equipment to the
                          application. Although sensors and control systems are—by far—less
                          costly than the automated manufacturing equipment, it is neither
                          useful nor cost-effective to apply the most sophisticated sensors and
                          controls, with the highest performance, to every possible application.
                          Rather, it is important that the design process determines the pre-
                          ferred parameter values.
                             The preferred values must be compatible with available equipment
                          and sensors and control systems, and should be those appropriate for



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