Frequency, Background Current | Lincoln Electric IM649 specification

Appendix A

PULSE WAVE SHAPING PRINCIPLES

A-15

A.5.2 FREQUENCY

Frequency, Figure A-7, is the number of pulses per second or, in theory, the number of weld droplets per second. Since increasing the frequency generates more pulses in a given time period, higher frequencies generate higher average current levels.

FIGURE A-7. FREQUENCY.

AVERAGE

CURRENT

BACKGROUND

CURRENT

T1

T2

T3

LARGER

DROPLETS

SHORTER

ARC

AVERAGE

CURRENT

BACKGROUND

CURRENT

T1

T2

T3

SMALLER

DROPLETS

LONGER

ARC

27850040

A.5.3 BACKGROUND CURRENT

The background current, Figure A-7, is set to maintain a desired plasma arc between weld droplet transfers and to control the heat input to the weld system.

WAVE DESIGNER

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Lincoln Electric IM649 manual Frequency, Background Current

Contents

Wave Designer TM Page Table of Contents Wave Designer Software License Agreement License Information Iii License Information User Responsibility IntroductionKEY Topics Product Overview Welding Equipment Requirements Software Release Data File Storage Locations Software InstallationSoftware Installation Procedure Welcome to Wave Designer Equipment Interface Connections Control Board DIP Switch Setting EQUIPMENT/SOFTWARE Startup Upgrade Firmware Synergic Welding and Workpoints Software Operation Waveform Editor Window Working in Wave Designer About the Procedure File Menu Waveform Editor Tool BAR Tools Tools Menu Wave Designer Pro Waveform Editor Print Menu Menu Editing and Selecting Workpoints WorkPoint Editor Editing Workpoints Efforts Selecting Workpoints Expand Graphic Editing Variable Parameters Reference Paragraph see Appendix a Wave Design Process Downloading Wave Shapes Flashing PowerWave Custom Weld Files Autosave Software Operation Introduction Using the ARC Scope WindowArcscope GSF Other ARC Scope Options File Arcscope Overview Wave Designer Troubleshooting Procedure Troubleshooting Troubleshooting Appendix a Pulse Wave Shaping PrinciplesAppendix Overview Figure A-1. Pulse Waveform Parameters Gmaw Pulse Overview Figure A-2. Weld Droplet Transfer NON-ADAPTIVE Mode Adaptive and NON-ADAPTIVE ModeAdaptive Mode Pulse Wave Design Process Figure A-4. Process Flowchart Selecting a Starting Wave Shape Select a Workpoint Customizing the Wave Shape Adapting Stickout Select an Adaptive Type Optional Close the Adaptive Loop / Adjust the Peak Voltage Start Control Adjust the Start Control Parameters Optional Shorting Control Adjust the Shorting Control Parameters Optional End Conditioning Adjust the End Condition Parameters Optional Developing the 2nd Workpoint Go Figure / Make the Waveform Synergic Peak Current and Peak Time Primary Pulse Waveform Components Background Current Frequency Secondary Waveform Parameters Application Exercise Fresa Start Control Pulse Waveform Editor 28750046 Pulse Wave Shaping Principles Appendix B STT Wave Shaping Principles Peak Time Peak Amps Tailout Speed STT Overview Figure B-2. Weld Droplet Transfer STT Surface Tension Transfer Surface Tension Transfer STT Wave Shaping Principles Reference Paragraph see Appendix B STT Wave Design Process Selecting a Starting Wave Shape Inch / min meter / min Go Figure Find the Optimal Arc Characteristics STT Start Control WorkPoint Editor Peak Current Primary STT Waveform Components Tailout Peak Time Secondary STT Waveform ComponentsPinch Start PINCH/PEAK STT Waveform Editor STT Waveform Editor Index-1 Index Index-2 Voltage Index-3 Index-4