Theory and Design of CNC Systems Part 14 potx

... 211 ADCBI-type NCK – architecture, 211 address, 237 aging, 328 AGV, 4 AIM, 404 and – AND, 260 and not – ANDN, 261 and stack – ANDS, 266 application layer, 275 approximation errors, 77 APT, 281 architecture ... 351–354, 1989. 146 . Szyperski, C., “Component Software: Beyond Object-Oriented Programming”, Addison Wesley, Boston, MA., 1999. 147 . Teltz, R., Elbestawi, M. Design Basis a...

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... number of the pulses from rough interpolation and Acc/Dec control at time i. t ipo is the it- eration time of rough interpolation and N is the ratio of the iteration time of rough interpolation and ... 4 Acceleration and Deceleration In order to smooth the movement of a machine, the acceleration and deceleration for the movementof the machineaxes should be controlled. For...

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... tool breakage due 146 4 Acceleration and Deceleration trajectory is inversely proportional to the feedrate and sudden changes of feedrate result in reduction of accuracy of the CNC equipment. In ... Ahead 149 mining the end speed of the current block considering the length of the block and the corner speed between two successive blocks. Set i = N Determine the start speed...

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... task is called CNC programming. 8.3.1 The Sequence of Part Programming Roughly, CNC programming is composed of the generation of a process plan from a part drawing and the generation of the part program. ... used on the shop floor and has a good effect on productivity. In this text book, the design and development of Shopfloor Oriented Programming systems embedded...

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... Open CNC 353 10.1 Introduction . . 353 10.2 DesignofSoftwareArchitecture 356 10.2.1 CNCSystemModeling 356 10.3 DesignofSoft-NCSystem 359 10.3.1 Design of Task Module . 359 10.3.2 DesignoftheSystemKernel ... 1.1. Contents Abbreviations xvii Part I Principles and NCK Design of CNC Systems 1 Introduction to NC Systems 3 1.1 Introduction . . 3 1.2 TheHistoryofNCandNCMachineToo...

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... detailed functions of any particular CNC. 2.2 Part Program Although the standard exists for generating a CNC part program, sequentially listing the commands for executing CNC, each CNC maker has, ... representative indicator that shows the design concept and the functional aspect of a CNC and is a big part of 33 26 1 Introduction to NC Systems System memory Part...

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... the interpreter of the CNC system is the soft- ware module of the NCK unit that interprets the part program consisting of G&M- code commands and related addresses such as S, T, and F. The interpreter ... understand the structure of a part pro- gram and the commands used therein. In a CNC system, various coordinate systems, such as the machine coordinate system, work...

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... execution algo- rithms and implementation by pseudo-code. In this chapter, only the design of NCK will be described and the overall design of the CNC system where the PLC and MMI units are included ... reference on design of digital drive systems. Figure 5 .14 shows the architecture of a speed feedforward controller where the posi- tion command, α w ,isfiltered and t...

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... methods and the method of designing a soft PLC system will be described together with design of Soft-NC in the later in this textbook. In Soft-NC, a PC is used as the hardware plat- form and all CNC ... Soft NC, Soft NC and Soft PLC can be regarded as the same system. Soft PLC which is made by a user interface and the PLC kernel based on the IEC1131-3 can be regarded as partia...

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... point of view. Furthermore, the design of the system kernel, which plays the role of booting up the CNC system, terminating the CNC system, communicating data and events to the tasks, and switching ... minimized and in which the number of tool changes is minimized, verifying tool paths and the finished part, and estimating machining time based on the minimum user input...

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