Theory and Design of CNC Systems Part 13 pptx
Theory and Design of CNC Systems Part 13 pptx
... 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 of standards-based data ... E of ISO
14649 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...
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 ... 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 the...
Theory and Design of CNC Systems Part 14 potx
... normal-normal, 133 136
block classification – normal-short, 138 , 139
block classification – short-normal, 136 138
block classification – short-short, 140, 141
block overlap, 126, 132
block overlap control, 132
block ... 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...
Theory and Design of CNC Systems Part 1 pps
... 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...
Theory and Design of CNC Systems Part 2 doc
... 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...
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 ... 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...
Theory and Design of CNC Systems Part 4 potx
... 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...
Theory and Design of CNC Systems Part 5 potx
... 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 the ADCBI type of NCK, the ... velocity of the ith interval and V
0
= 0
L
i
is the displacement for the ith sampling time.
N
A
=
T
A
τ
.
132 4 Acceleration and Deceleration
In the constant speed range th...
Theory and Design of CNC Systems Part 8 ppsx
... standard
IEC 1131 , is the international standard for PLC, consisting of five parts and IEC 1131 -
3 is one of the parts of which IEC 1131 is composed.
1. IEC 1131 -1: PLC General information.
2. IEC 1131 -2: ... 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 IEC 1131 -3 can be regarded as...
Theory and Design of CNC Systems Part 9 potx
... 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...