poradnik SAM.pdf

User's Guide

SAM 6.0

The Ultimate

Mechanism Designer

By ARTAS - Engineering Software

ARTAS - Engineering Software

Het Puyven 162

NL - 5672 RJ Nuenen

The Netherlands

tel/fax: +31 (0)40 2837552

E-mail: info@artas.nl

URL: www.artas.nl

27/10/2007

Contents

Preface 1-1

What is SAM ? ............................................................................................... 1-1

What's new in SAM 6.0 ? .............................................................................. 1-2

About this User's Guide ................................................................................. 1-4

Purchase Agreement ...................................................................................... 1-4

Overview 2-1

The Design Process........................................................................................ 2-1

Capabilities .................................................................................................... 2-2

Design ................................................................................................ 2-2

Modelling ........................................................................................... 2-2

Input Motion ...................................................................................... 2-2

CAD Interface .................................................................................... 2-3

Analysis Results................................................................................. 2-3

Post-Processing .................................................................................. 2-3

Optimization ...................................................................................... 2-3

History, Present and Future............................................................................ 2-4

European Academic Software Award............................................................ 2-5

Getting Started 3-1

System Requirements..................................................................................... 3-1

Installing SAM............................................................................................... 3-1

Before you install SAM ..................................................................... 3-1

Installation Procedure ........................................................................ 3-1

First Time Use (License Information) ............................................... 3-1

Use of SAM 3.0, 4.x and 5.x project files...................................................... 3-2

A Guided Tour 4-1

Running a sample project............................................................................... 4-1

A quick example ................................................................................ 4-2

Using the Design Wizard to create a mechanism .......................................... 4-6

Building a new mechanism (without Design Wizard) ................................. 4-10

Example of a 4-bar mechanism (motion analysis)........................... 4-11

Design Wizards 5-1

4-Bar Mechanism........................................................................................... 5-1

General (nodes) .................................................................................. 5-1

General (nodes, angle, dimension)..................................................... 5-2

Angle Function Synthesis .................................................................. 5-3

3-Position Synthesis (I)...................................................................... 5-5

3-Position Synthesis (II) .................................................................... 5-6

SAM - The Ultimate Mechanism Designer

Preface • 0-i

Exact Straight Line Mechanism..................................................................... 5-7

Symmetric Slider-Crank Mechanism................................................. 5-7

Geared Double-Crank Mechanism .................................................... 5-8

Hypo-Cyclic Planetary Gear Mechanism .......................................... 5-8

Planetary Gear-Coupled Dyad ........................................................... 5-9

Belt-Coupled Dyad ............................................................................ 5-9

Approximated Straight Line Mechanism..................................................... 5-10

Watt .................................................................................................. 5-10

Chebyshev........................................................................................ 5-11

Roberts ............................................................................................. 5-11

Evans................................................................................................ 5-12

Hoecken ........................................................................................... 5-12

Modelling Considerations 6-1

Units ............................................................................................................... 6-1

Exact Nodal Coordinates ............................................................................... 6-1

Motion File..................................................................................................... 6-2

Format ................................................................................................ 6-2

Importing a motion file ...................................................................... 6-4

Exporting a motion file ...................................................................... 6-4

Multiple Input Motions .................................................................................. 6-4

Linear Actuator .............................................................................................. 6-4

Inclined Linear Guiding ................................................................................. 6-4

Building Multi-Node Linkages ...................................................................... 6-5

Modelling a rack/pinion ................................................................................. 6-6

Forces in Moving Nodes ................................................................................ 6-8

Using Graphics............................................................................................... 6-8

Optimization 7-1

Introduction.................................................................................................... 7-1

Optimization Objective .................................................................................. 7-2

Parameter Space............................................................................................. 7-4

Optimization Options..................................................................................... 7-5

Examples 8-1

Motion Analysis............................................................................................. 8-1

Crank Rocker Mechanism.................................................................. 8-1

Quick-Return Mechanism .................................................................. 8-2

Slider Driven Gear Transmission....................................................... 8-3

Double Crank Mechanism ................................................................. 8-3

Planetary Mechanism (Hypo-Cyclic) ................................................ 8-4

Force Analysis ............................................................................................... 8-5

Transfer Mechanism (incl. gravity effects)........................................ 8-5

Belt drive with external force ............................................................ 8-6

Optimization .................................................................................................. 8-7

Driving Torque Minimization............................................................ 8-7

Optimization of trajectory.................................................................. 8-8

Elements

9-1

SAM - The Ultimate Mechanism Designer

Preface • 0-ii

Beam .............................................................................................................. 9-1

Slider .............................................................................................................. 9-3

Gear................................................................................................................ 9-6

Belt ............................................................................................................... 9-10

Spring, Damper, Friction ............................................................................. 9-13

Rotational Spring, Damper, Friction............................................................ 9-16

Non-linear spring ......................................................................................... 9-20

Integrated Analysis Environment 10-1

Keyboard and Mouse ................................................................................... 10-1

Toolbar ......................................................................................................... 10-2

Menu Commands ......................................................................................... 10-4

File Menu ......................................................................................... 10-4

Build Menu ...................................................................................... 10-5

Graphics Menu................................................................................. 10-6

Input Menu....................................................................................... 10-7

Loads Menu ..................................................................................... 10-9

Analysis Menu ............................................................................... 10-11

Optimize Menu .............................................................................. 10-11

Display Menu................................................................................. 10-11

Results Menu ................................................................................. 10-12

Window Menu................................................................................ 10-13

Help Menu ..................................................................................... 10-13

Literature

11-1

Appendix 12-1

Analysis Problems ....................................................................................... 12-1

DXF Template File ...................................................................................... 12-2

What was new in SAM 5.1 ?........................................................................ 12-2

What was new in SAM 5.0 ?........................................................................ 12-3

What was new in SAM 4.2 ?........................................................................ 12-3

What was new in SAM 4.1 ?........................................................................ 12-4

What was new in SAM 4.0 ?........................................................................ 12-5

Glossary of Terms ........................................................................................ 12-7

Index

13-1

SAM - The Ultimate Mechanism Designer

Preface • 0-iii

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