Theory and Design of CNC Systems Part 8 ppsx

... 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

... 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 ... –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

... 41 G 58, 41 G59, 41 G61, 48, 126 G62, 49 G63, 49 G64, 48, 49, 126 G 68, 42 G70, 54 G71, 54 G72, 54 G73, 54 G74, 54 G75, 54 G76, 54 G80, 54 G81, 54 G82, 54 G83, 54 G84, 54 G84.2, 54 G84.3, 54 G85, ... 157 ADCAI, 107–1 28, 187 ADCBI, 107, 1 08, 1 28 155, 187 , 211 ADCBI-type NCK – architecture, 211 address, 237 aging, 3 28 AGV, 4 AIM, 404 and – AND, 260 and not – ANDN, 261 and stack –...

Ngày tải lên: 11/08/2014, 20:21

... 271 8. 1.2 Area for Data Input 273 8. 1.3 AreaforMPGHandling 273 8. 1.4 AreaforMachineOperation 273 8. 2 StructureoftheMMISystem 275 8. 3 CNCProgramming 2 78 8.3.1 TheSequenceofPartProgramming 2 78 8.3.2 ... 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...

Ngày tải lên: 11/08/2014, 20:21

... the concept of Soft-NC is applied. The CNC shown in Fig. 1.19 is designed based on the concept of modular- ization, standardization, and distributed processing and uses STEP-compatible part programs ... 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 Par...

Ngày tải lên: 11/08/2014, 20:21

... 30 6 4 10 0 40 8 5 0 0 40 8 6 0 10 30 6 7 0 10 20 4 8 0 10 10 2 9 0 10 0 0 Σ 40 48 As shown in Table 4.2, the maximum value of output pulses is 8 and this is less than the number of input pulses, ... to smooth the movement of a machine, the acceleration and deceleration for the movementof the machineaxes should be controlled. For CNC systems, two kinds of Acceleration...

Ngày tải lên: 11/08/2014, 20:21

... method of minimizing the reduction of feedrate was introduced by considering the commanded feedrate and the length of the successive blocks. X (mm) Y (mm) -10 -8 -6 -4 -2 0 2 4 6 8 10 -2 0 2 4 6 8 10 12 Fig. ... Acceleration and Deceleration trajectory is inversely proportional to the feedrate and sudden changes of feedrate result in reduction of accuracy of the CNC e...

Ngày tải lên: 11/08/2014, 20:21

... 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 ... (n=1,200) pos command(n)=10.0-real(n)*0.02; /Generation of position/ /command for simulation/ pos command (n+100) =8. 0+real(n)*0.02; end / Position control loop / begin (n=1,...

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. ... TANTO,CI 58 GOFWD/CI 58, TANTO,LI85 THICK/0.0,0.13,0.0 GOFWD/LI85,ON,(LINE/(POINT/6.25,-1.255,1.0),PERPTO,(LINE/$ 6.2507,-1.255,1.0,6.25,-1.255,1.0)) THICK/0.0,...

Ngày tải lên: 11/08/2014, 20:21

... sequence of lines or arcs and is used for visual verification of the toolpath of a part program (see Fig. 8. 19a). It provides the functions for checking for collisions between tools and clamps and ... 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 ev...

Ngày tải lên: 11/08/2014, 20:21