Theory and Design of CNC Systems Part 6 pptx

... 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 ... call the sub program and user-defined G-code 6. 2 Architecture of ACDAI-type NCK 193 Input to interpreter A part program is input to the Interpreter and the composition...

Ngày tải lên: 11/08/2014, 20:21

... E of ISO 1 464 9 Part 11. Figure 11.18 shows the overall structure of the STEP-NC part pro- gram for the test part of Fig. 11.17. Note that the part program of Fig. 11.18 is just a fraction of ... goal of using STEP-NC and other standards to develop an open database of all the information necessary to design and manufacture a part. While NIST understands the value...

Ngày tải lên: 11/08/2014, 20:21

... operation, 414 partially open CNC, 392 path generator, 63 PC NC, 353 PC-based MMI, 275 performance – key indices, 340 PI control, 164 PI controller, 161 PID, 157, 162 – 166 PID controller, 162 , 164 – 166 PID ... 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 approxim...

Ngày tải lên: 11/08/2014, 20:21

... Open CNC 353 10.1 Introduction . . 353 10.2 DesignofSoftwareArchitecture 3 56 10.2.1 CNCSystemModeling 3 56 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 TheHistoryofNCandNCMachin...

Ngày tải lên: 11/08/2014, 20:21

... 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 program D.P.R MMI Internal data block D.P.R PLC FIFO ... detailed functions of any particular CNC. 2.2 Part Program Although the standard exists for generating a CNC part program, sequentially listing...

Ngày tải lên: 11/08/2014, 20:21

... 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 ... –3 9 –17 6 9 4 9 6 6 1 –17 5 9 5 9 7 –11 11 –15 5 8 5 8 8 0 13 –15 4 8 6 8 9 13 15 –15 3 8 7 8 10 –2 15 –13 3 7 7 7 11 13 17 –13 2 7 8 7 12 0 17 –11 2 6 8 6 13 17...

Ngày tải lên: 11/08/2014, 20:21

... 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 ... axis 234 567 2 3 4 5 6 Y - axis 7 0 0 (a) 1 1 X - axis 234 567 2 3 4 5 6 Y - axis 7 0 0 (b) 1 1 X - axis 234 567 2 3 4 5 6 Y - axis 7 0 0 (c) Fig. 3.20 NURBS curves point...

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... 4 .66 and the constant speed time is calculated by Eq. 4 .67 . The speed profile of the deceleration interval can be obtained by Eq. 4. 56 where the speed at the beginning of deceleration is F 2 and ... due 1 46 4 Acceleration and Deceleration trajectory is inversely proportional to the feedrate and sudden changes of feedrate result in reduction of accuracy of the CNC equ...

Ngày tải lên: 11/08/2014, 20:21

... 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...

Ngày tải lên: 11/08/2014, 20:21

... 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...

Ngày tải lên: 11/08/2014, 20:21