Lincoln Electric IM649 Appendix B B-3

Appendix B B-3

STT WAVE SHAPING PRINCIPLES

WAVE DESIGNER

27850060

BACKGROUND AMPS

PINCH AMPS

PEAK

AMPS

TAIL O U T

T

1T2T3T5T6T7

T0

FIGURE B-2. WELD DROPLET TRANSFER.

• From time T0to T1: Background current is a steady-state current level, between 50 and

(Background Current) 100 Amps that maintains an arc to form a weld bead.

• From time T1to T2: An arc voltage detector indicates that the arc is shorted; background

(Ball Time) current is reduced for approximately 0.75 milliseconds.

• From time T2to T3: High current is applied to speed the transfer of molten metal to the

(Pinch) weld puddle. A dV/dt calculation indicates when fuse separation is

about to occur; current is reduced to 50 Amps.

• Time T4: Fuse separation occurs at low current. Time T4is a function of

(Fuse Separation) voltage, and not indicated on the amperage waveform.

• From time T5to T6: A period of high arc current that melts the electrode back.

(Plasma Boost)

• From time T6to T7: Arc current is reduced from Peak Amps to the Background current

(Plasma) level.

Contents

Main Wave Designer SOFTWARE OPERATORS MANUAL IM649 Safety Depends on You Page i TABLE OF CONTENTS ii ii LICENSE INFORMATION iii iii LICENSE INFORMATION Page 1.1 PRODUCT OVERVIEW 1.2 USER RESPONSIBILITY Section 1 1-1 INTRODUCTION 1.3 COMPUTER SYSTEM REQUIREMENTS KEY TOPICS 1.4 SOFTWARE RELEASE DATA 1.5 WELDING EQUIPMENT REQUIREMENTS INTRODUCTION 2.1 FILE STORAGE LOCATIONS 2.2 SOFTWARE INSTALLATION PROCEDURE Section 2 2-1 2-2 Section 2 Wave Designer 2.3 EQUIPMENT INTERFACE CONNECTIONS Section 2 2-3 FIGURE 2-2. CONTROL BOARD DIP SWITCH SETTING. FIGURE2-3. INTERFACE CONNECTION. http://www.pc.ibm.com/qtechinfo/DSHY-3P5QW4.html How to enable the external serial port on your ThinkPad 2.4 EQUIPMENT/SOFTWARE STARTUP 600 -20 250 1.2 SOFTWARE OPERATION 3.2 WORKING IN 3-2 Section 3 WAVE DESIGNER 3.2.1 WAVEFORM EDITOR WINDOW Section 3 3-3 About the Procedure 3-4 Section 3 3.2.2 WAVEFORM EDITOR TOOL BAR 3.2.2.1 FILE MENU 3.2.2.2 TOOLS MENU Section 3 3-5 Help Tools Print Pulse Editor Ctrl+P Ctrl+E Ctrl+A Ctrl+F Ctrl+B STT Editor ArcScope Flash Custom Waveform Browse Mode Directory Upgrade Firmware Wave Designer Pro Waveform Editor Wave Designer ArcScope Printed on Thu Jul 09 07:25:58 EDT 1998 --- Amp --- dV/dt 3.2.3 EDITING AND SELECTING WORKPOINTS Section 3 3-7 Adapt Short End 600 -20 3.2.3.1 EDITING WORKPOINTS 3-8 Section 3 WorkPoint Editor 3.2.3.2 SELECTING WORKPOINTS Section 3 3-9 3.2.4 EDITING VARIABLE PARAMETERS 3-10 Section 3 Section 3 3-11 3.3 WAVE DESIGN PROCESS 3-12 Section 3 3.4 DOWNLOADING WAVE SHAPES Section 3 3-13 3.5 AUTOSAVE Page 4.1 INTRODUCTION 4.1.1 USING THE ARC SCOPE WINDOW Condense Live Update Condense 4.1.2 OTHER ARC SCOPE OPTIONS 4-2 Section 4 Section 4 4-3 Page TROUBLESHOOTING Page A.1 APPENDIX OVERVIEW Appendix A A-1 A-2 Appendix A Pulse Waveform Editor Status A.2 GMAW PULSE OVERVIEW % OVERSHOOT SPEED RAMP-UP RATE Appendix A A-3 A.3 ADAPTIVE AND NON-ADAPTIVE MODE A.3.1 ADAPTIVE MODE A.3.2 NON-ADAPTIVE MODE A-4 Appendix A = A.4 PULSE WAVE DESIGN PROCESS Appendix A A-5 A.4.1 SELECTING A STARTING WAVE SHAPE A-6 Appendix A A.4.2 CUSTOMIZING THE WAVE SHAPE 1. Select a Workpoint Appendix A A-7 2. Open the Adaptive Loop / Find the Optimal Arc Characteristics A-8 Appendix A 3. Close the Adaptive Loop / Adjust the Peak Voltage 4. Select an Adaptive Type (Optional) Appendix A A-9 5. Adjust the Start Control Parameters (Optional) A-10 Appendix A 6. Adjust the Shorting Control Parameters (Optional) Appendix A A-11 Shorting Control 7. Adjust the End Condition Parameters (Optional) A-12 Appendix A End Conditioning 8. Go Figure/ Make the Waveform Synergic Developing the 2nd Workpoint Appendix A A-13 WorkPoint Editor Workpoints Interpolation A.5 PRIMARY PULSE WAVEFORM COMPONENTS A.5.1 PEAK CURRENT AND PEAK TIME A-14 Appendix A A.5.2 FREQUENCY Appendix A A-15 A.5.3 BACKGROUND CURRENT A.6 SECONDARY WAVEFORM PARAMETERS A.6.1 RAMP-UP RATE A.6.2 RAMP OVERSHOOT % A.6.3 TAILOUT SPEED A.6.4 TAILOUT TIME A.7 APPLICATION EXERCISE Select a wave shape. Pick a wire feed speed Appendix A A-17 A-18 Appendix A Adaptive mode. set the Peak Voltage select No Adapt adjust the pulse variables to improve welding performance. Start Control A-20 Appendix A second workpoint Appendix A A-21 Page B.1 APPENDIX OVERVIEW Appendix B B-1 B-2 Appendix B STT Waveform Editor 200 Status AMPERES PINCH START dV/dt CALCULATE PEAK TIME PEAK AMPS SPEED BACKGROUND AMPS Appendix B B-3 B.3 STT (SURFACE TENSION TRANSFER) B-4 Appendix B p Surface Tension Transfer Electrode Electrode to work volts Electrode Amperes Appendix B B-5 B.4 STT WAVE DESIGN PROCESS B-6 Appendix B B.4.1 SELECTING A STARTING WAVE SHAPE Appendix B B-7 B.4.2 CUSTOMIZING THE WAVE SHAPE 1. Select a Workpoint B-8 Appendix B 2. Find the Optimal Arc Characteristics Appendix B B-9 3. Adjust the Start Control Parameters (Optional) B-10 Appendix B STT Start Control 4. Go Figure/ Make the Waveform Synergic Developing the 2nd Workpoint Appendix B B-11 WorkPoint Editor Workpoints Interpolation B.5 PRIMARY STT WAVEFORM COMPONENTS B.5.1 PEAK CURRENT B-12 Appendix B B.5.3 TAILOUT Appendix B B-13 B.5.2 BACKGROUND CURRENT B.6 SECONDARY STT WAVEFORM COMPONENTS B.7 APPLICATION EXERCISE Select a wave shape. Appendix B B-15 Pick a wire feed speed Select 130 adjust the STT variables to improve welding performance. B-16 Appendix B STT Waveform Editor A B C D INDEX INDEX M O P R INDEX