Lincoln Electric IM649 manual Frequency, Background Current

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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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Contents Wave Designer TM Page Table of Contents Wave Designer Software License Agreement License InformationIii License Information User Responsibility IntroductionKEY Topics Product OverviewWelding Equipment Requirements Software Release DataFile Storage Locations Software InstallationSoftware Installation Procedure Welcome to Wave Designer Equipment Interface ConnectionsControl Board DIP Switch Setting EQUIPMENT/SOFTWARE Startup Upgrade FirmwareSynergic Welding and Workpoints Software OperationWaveform Editor Window Working in Wave DesignerAbout the Procedure File Menu Waveform Editor Tool BARTools Tools MenuWave Designer Pro Waveform Editor Print MenuMenu Editing and Selecting WorkpointsWorkPoint Editor Editing WorkpointsEfforts Selecting WorkpointsExpand Graphic Editing Variable ParametersReference Paragraph see Appendix a Wave Design ProcessDownloading Wave Shapes Flashing PowerWave Custom Weld FilesAutosave Software Operation Introduction Using the ARC Scope WindowArcscope GSF Other ARC Scope OptionsFile Arcscope Overview Wave Designer Troubleshooting Procedure TroubleshootingTroubleshooting Appendix a Pulse Wave Shaping PrinciplesAppendix Overview Figure A-1. Pulse Waveform Parameters Gmaw Pulse OverviewFigure A-2. Weld Droplet Transfer NON-ADAPTIVE Mode Adaptive and NON-ADAPTIVE ModeAdaptive Mode Pulse Wave Design Process Figure A-4. Process FlowchartSelecting a Starting Wave Shape Select a Workpoint Customizing the Wave ShapeAdapting Stickout Select an Adaptive Type Optional Close the Adaptive Loop / Adjust the Peak VoltageStart Control Adjust the Start Control Parameters OptionalShorting Control Adjust the Shorting Control Parameters OptionalEnd Conditioning Adjust the End Condition Parameters OptionalDeveloping the 2nd Workpoint Go Figure / Make the Waveform SynergicPeak Current and Peak Time Primary Pulse Waveform ComponentsBackground Current FrequencySecondary Waveform Parameters Application Exercise Fresa Start Control Pulse Waveform Editor 28750046 Pulse Wave Shaping Principles Appendix B STT Wave Shaping PrinciplesPeak Time Peak Amps Tailout Speed STT OverviewFigure B-2. Weld Droplet Transfer STT Surface Tension Transfer Surface Tension TransferSTT Wave Shaping Principles Reference Paragraph see Appendix B STT Wave Design ProcessSelecting 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 ComponentsTailout Peak Time Secondary STT Waveform ComponentsPinch Start PINCH/PEAKSTT Waveform Editor STT Waveform Editor Index-1 IndexIndex-2 Voltage Index-3Index-4