ABSTRACT
This chapter discusses the general characteristics of the more commonly used instruments, data accumulators and control systems. In modern cold-rolling mills, hydraulic systems are used extensively to adjust or control the positions of many mill components. The value of the rolling force is a very important process parameter and operators of mills with reliable rolling force indicators soon learn to depend upon these instruments for proper mill control. For example, in the absence of instrumentation which monitors rolled strip shape, rollers usually find that operating the mill stands with rolling forces within certain ranges constitutes their best assurance in attaining satisfactory shape. For the convenience of mill operators, controls and instruments have always been provided on panels or pendants located close to the mill stands. Some instrumentation is located remotely from the mill, however. Rooms housing motor generator sets and electrical control equipment are often some short distances from the mill and sometimes below ground level.
