Theory and Design of CNC Systems Part 12 ppt

... byreal-time programming techniques.392 10 Design of PC-NC and Open CNC systems by modularization of system components and standardization of platforms and interfaces between modules, it is necessary ... com-munication task of MMI is designed as application software based on Windows 95.Therefore, on the side of MMI, the communication task can be designed easily by388 10 Design of PC-NC and Open CNC which ... closed architecture. However, CNC systems of Type 1 or Type 2 cannot change or modify a part of hardware or software with-out knowledge of the interface and dependency of each module. In contrast,...

Theory and Design of CNC Systems Part 6 pptx

... execution algo-rithms and implementation by pseudo-code. In this chapter, only the design of NCKwill be described and the overall design of the CNC system where the PLC and MMIunits 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,αw,isﬁltered and the ﬁltered command is input ... distortion of table, and the characteristics of the servo system as well as dynamicerrors due to high speed operation of the servo system, acceleration or decelerationoperation, and the change of movement...

Theory and Design of CNC Systems Part 13 pptx

... goal of using STEP-NC and other standards to develop an opendatabase of all the information necessary to design and manufacture a part. WhileNIST understands the value of standards-based data ... Development of Korea STEP-NC: STEP -CNC system for milling• Development of TurnSTEP: STEP -CNC system for turning• Development of the data model for turning (ISO14649 Part 12 and 121 ) withISW-University ... E of ISO14649 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 justa fraction of...

Theory and Design of CNC Systems Part 14 potx

... 107 128 , 187ADCBI, 107, 108, 128 –155, 187, 211ADCBI-type NCK – architecture, 211address, 237aging, 328AGV, 4AIM, 404 and – AND, 260 and not – ANDN, 261 and stack – ANDS, 266application layer, ... function, 56soft bus, 30, 416soft PLC, 247–249soft real-time system, 319Soft-NC, 30, 248, 353, 355, 357, 359, 362–364,366–369, 372–377, 388, 392, 393, 416software model, 242softwired NC, ... Transactions,Journal of Dynamic Systems, Measurement and Control, Vol. 109, pp. 65–68, 1987.151. Toshiba, “Numerical Control Unit”, US patent 5994863, 1999.152. University of Utah Research, “Method and system...

Theory and Design of CNC Systems Part 1 pps

... Open CNC 35310.1 Introduction . . 35310.2 DesignofSoftwareArchitecture 35610.2.1 CNCSystemModeling 35610.3 DesignofSoft-NCSystem 35910.3.1 Design of Task Module . 35910.3.2 DesignoftheSystemKernel ... 1.1.ContentsAbbreviations xvii Part I Principles and NCK Design of CNC Systems 1 Introduction to NC Systems 31.1 Introduction . . 31.2 TheHistoryofNCandNCMachineTools 61.3 CNC Driving System Components ... Lee,Hye-Jung Kim, and Hildegarde Nagy-Stroud and to the rest of our familiesfor their endurance of this headlong task.1.3 CNC Driving System Components 15 of signals and the miniaturization of the device...

Theory and Design of CNC Systems Part 2 doc

... detailed functions of anyparticular CNC. 2.2 Part ProgramAlthough the standard exists for generating a CNC part program, sequentially listingthe commands for executing CNC, each CNC maker has, ... representative indicatorthat shows the design concept and the functional aspect of a CNC and is a big part of 3326 1 Introduction to NC Systems Systemmemory Part programD.P.RMMIInternaldatablockD.P.RPLCFIFO ... Coolant: command coolant on or off.(2) Start/End of a main and sub program: inform thebeginning and end of a part program.(3) Spindle: command a spindle to rotate in CCW or CWdirection and specify...

Theory and Design of CNC Systems Part 3 ppsx

... 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 ... the internalbehavior of the interpreter, it is necessary to understand the structure of a part pro-gram and the commands used therein.In a CNC system, various coordinate systems, such as the ... XPulse to YQ1=Q1+AFig. 3.7 Software DDA interpolatorment of the X-andY-axes, and the initial value of variables Q1 and Q2 is zero. InFig. 3.7b, the initial values of variables are the same as...

Theory and Design of CNC Systems Part 4 potx

... number of the pulses from rough interpolation and Acc/Dec control at time i. tipois the it-eration time of rough interpolation and N is the ratio of the iteration time of roughinterpolation and ... 4Acceleration and DecelerationIn order to smooth the movement of a machine, the acceleration and deceleration forthe movementof the machineaxes should be controlled. For CNC systems, two kinds of Acceleration ... space and if u is ui and multiplicity of knot uiis k, P(u) can be differentiated as many as p −k times.• The movement of control point Pior the change of weight wiaffects the portionof...

Theory and Design of CNC Systems Part 5 potx

... Acceleration and Decelerationtrajectory is inversely proportional to the feedrate and sudden changes of feedrateresult in reduction of accuracy of the CNC equipment.In the ADCBI type of NCK, the ... connected it is possible to classify pairs of blocks into twelve typesdepending on the type of block (e.g. normal block and short block) and the difference of commanded feedrate between the two blocks. ... speed proﬁle of the acceleration interval of Block N1 can be obtained byEq. 4.73 and Eq. 4.55. The speed proﬁle of the deceleration interval of Block N2can be obtained by Eq. 4.74 and Eq. 4.56,...

Theory and Design of CNC Systems Part 8 ppsx

... methods and themethod 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 userinterface and the PLC kernel based on the IEC1131-3 can be regarded as partial systems of Soft-NC.Figure ... conﬁguration and software of a Soft PLC, pleaseread other references about Soft-NC and Open CNC systems. 7.7 PLC Conﬁguration ElementsIn this section, the conﬁguration and execution structure of a...

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