‘STEPNCFBUoA’ - An Advanced Manufacturing Control System based on STEP-NC and FB enabled technology.

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STEPNCFBUoA – An Advanced Manufacturing

Control System based on

STEP-NC and FB Technology

Agenda: 1. Introduction, Background, Motivation and Objectives 2. STEP, STEP-NC and Function Block

3. Framework Modules 4. Development Tools

5. Implementation 6. Publications

7. Conclusions

ICEI2010 Feb 18-20 Holiday Inn Melaka

Supervisor : Associate Professor Xun Xu Co-Supervisor : Dr. Valeriy Vyatkin

Mohamad Bin Minhat

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Introduction

International Electrotechnical International

Organization for

• _{STEP-NC Controller}_{is about:}

* investigating into a future model of CNC controller

* that operates directly on STEP-NC (ISO 14649)

• _{This research incorporates}_{Function Blocks}_{that are an:}

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Background

• _Current_Technologies_{: * Computer-Aided}_Design₍_CAD₎

* Computer-Aided Process Planning (CAPP)

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Motivation and Objectives

• _Motivation:

* Development of an advanced CNC controller

based on the

new

CAM/CNC interface

scheme of

STEP-NC

to enable

feature-based manufacturing via

function block

technology

* To develop

a platform for research

on fundamental

technologies of a STEP-NC controller

* To both build a

conceptual framework

and

implement

a

physical system framework of the STEP-NC controller

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Why STEP-NC And Function Blocks?

STEP-NC (ISO 14649) - Standard for the

Exchange of Product data for Numerical Control.

Function blocks (IEC 61499) - an emerging IEC standard for distributed industrial processes and control systems.

STEP-NC data model represents a common

standard for NC programming Function Blocks can be used for CNC controls to encapsulate machining data, e.g., machining features & algorithms.

• Both demand higher-level input data

• _{Both share}_{rich information}_{for CNC}

• STEP-NC provides the high-level data containing information such as machining features, set-up, Workplan, Workingsteps and etc.

• _{Function blocks}_{act as the}_{tool/technology}_{to execute CNC machining and}

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Modules in the STEP-NC Controller

• _{The feature-based STEP-NC Controller consists of:}

* Data

Input

Module

* STEP/FB

Translator

* Tool-Path Generator

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Architecture of the System

‘The new software that fits in with any general computer which is independent of any controller vendors, plus a communication standard among computer hardware (LPT1), an

operation system (Windows or Linux) and application software (FB Holobloc)’.

STEP/FB Translator

Data Input Module Tool Path Generator

STEP-NC Controller Signal Mapping Device

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Development Tools

• STEP-NC data models (Off-line Interpretation): * EXPRESS Schema – Combined_Schema * ISO 10303 -21 – Part 21 File

* ISO 14649 -10 – General Process Data

* ISO 14649 -11 – Process Data for Milling

* ISO 14649 -111 – Tools for Milling Machines.

• _Tools_:

* ST-Developer (Off-line) * Express Engine (Off-line)

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Data Input Model Module by Layers

• Data Input Model works with two types of data:

• _{Generic data}_{– machining method,}

machining sequence and

machine tool data

* Native data – cutting tool

data, cutting condition and tool-paths

generation.

• Main source is from STEP Part 21 physical

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STEP/FB Translator Module

• Source of input: Part 21 physical file (ISO 10303-21)

• STEP/FB Translator has four parts of

* Data Extractor

* Main Processor

* Converter

* FB Editor.

• Supporting software: Java Development Kit (JDK), Java Run Time Environment (JRE) and Java 3D

STEP/FB Translator

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Graphical User Interface (GUI)

• _On-line_functions

linked to FB

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Linkage to FB Editor for Machining

• _{STEPNCFBUoA system application}

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Ready for Machining: STEP-NC Controller

•

Adaptor-FB-Controller

(i) Without casing

(ii) With a casing Interface 3D

Simulation

Machining Data Editor Box

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Publications and Conferences

• Book Chapter

1. Minhat, M. & Xu X. (2008). ‘Characteristics and Technologies of Advanced CNC Systems’. in Encyclopedia of

Information Science and Technology, Second Edition ed. Vol. 2, M. Khosrow-Pour, Ed.: IGI Global, Hershey, PA 17033-1240, USA (2008)., pp.519-526

• Journals

2. Minhat, M., Vyatkin, V., Xu, X., Wong, S. & Al-Bayaa, Z (2009). ‘A novel open CNC architecture based on

NC data model & IEC 61499 function blocks’. Robotics & Computer-Integrated Manufacturing, Vol. 25. pp.560-569

3. Minhat, M., Xu, X. & Vyatkin, V. (2009). ‘STEPNCMillUoA: A CNC system based on STEP-NC and Function

Block

architecture’. International Journal of Mechatronics and Manufacturing Systems, Vol. 2. pp.3-19

• Conferences

4. Minhat, M., Xu, X. W. & Vyatkin, V. (2008). ‘Development of an Open Soft CNC System Based on STEP-NC &

Function Blocks’. 5th International CIRP-sponsored Conference on Digital Enterprise Technology (DET) , 22-24

October 2008, Nantes, France

5. Minhat, M. & Xu, X. (2009). ‘A feature-based Machining Using Function Block Technology’. 7th IEEE International

Conference on Control & Automation (ICCA’09). 9-11 December, 2009, Christchurch, New Zealand

6. Minhat, M. & Xu, X. (2009). ‘STEPNCFBUoA’ - An Advanced Manufacturing Control System based on STEP-NC

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Conclusions

Thank You.

• _{Tools implemented in the design methodology, the architecture and the system}

support real-time machining simulation

• _{It has been}_tested_{through system application using a CNC milling machine}

• _{The research}_proved_{that use of function block technology allows the}

development of an open architecture control system

• _{STEP-NC controller has}_successfully_{been implemented using STEP-NC data}

input, JAVA, NetBeans and the IEC 61499 architecture

• _{This STEP-NC controller is the very}_first_{CNC system implementing STEP-NC}