數(shù)控技術(shù)概述-展示頁(yè)
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【正文】 Types of NC ServoDrive System ClosedLoop ServoDrive It is characterized as a system that the direct feedback monitors the output of servomotor. A feedback sensor directly measures the position of worktable. With its drive signal originated by the worktable, It is the preferred system because it monitors the actual position of the worktable on which the part is mounted. It is more accurate。 (3)Application of NC . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Types of NC Motion Control System Motion control systems for NC can be divided into two types: (1) Pointtopoint control system (點(diǎn)位控制系統(tǒng) )。 the program of instructions is called a part program. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Basic Components of NC Machine Tools The program is coded on a suitable medium for submission to the machine control unit. The mon medium in the past is punched tape, magic tape: . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Basic Components of NC Machine Tools Now, The mon medium is diskette, electronic transfer from a puter(RS232C): . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Basic Components of NC Machine Tools MCU consists of a microputer and related control hardware that stores the program of instructions and executes it by converting each mand into mechanical actions of machine tool, one mand at a MCU includes system software,calculation algorithm,and transition software to covert the NC parts program into a usable format for the MCU . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Basic Components of NC Machine Tools Spindle and feed drive motors and their servoamplifiers are the ponents of the servodrive MCU processes the data and generates discrete numerical position mands for each feed drive and velocity mand for the spindle numerical mands are converted into signal voltage by the MCU unit and sent to servoamplifiers, which process and amplify them to the high voltage levels required by the drive motors. The drives in machine tools are classified as spindle and feed drive mechanisms. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL CLASSIFICATIONS OF NC MACHINE Numerical control machines are classified in different way: (1)The types of NC motion control system。 (4)the feedback transducer。 (2)the machine control unit。NUMERICAL CONTROL TECHNOLOGY Chapter 1 Introduction to Numerical Control Teacher Xu Cijun 13872082953 62956 . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL 、 Fundamental of NC Technology 、 Classifications of NC Machines 、 Features of Numerical Control and Its Application Areas Course Description: ? NC is one of the most important achievements in mechanical engineering field in 20 century. ? It is a crossing and integrating technology prising of puter technology, automatic control technology, information technology, sense technology, and machining technology. ? Numerical Control Technology has became one of the important technical basic classes of mechanical engineering specialty. Toshiba events . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL 、 Development History of NC 1946the first puter appeared in the world, which lift the curtain on the mankind into information time. 1948Parsons Corporation brought forward using puter to control machine when they machined the surface contours of airfoil shape. Parsons Corporation was a minihelicopter manufacturer. The machining accuracy of the airfoil shape was 177。 . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL 、 Development History of NC Under the support by the Air Force Responsed by the Servomechanisms Laboratory at the MIT (Massachusetts Institute of Technology
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