Lincoln Electric IM649 manual STT Wave Shaping Principles, Appendix B

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Appendix B

STT WAVE SHAPING PRINCIPLES

B-1

B.1 APPENDIX OVERVIEW

This appendix provides a series of discussions on STT wave shaping principles and the development of custom STT waveforms. The contents of this appendix are arranged as follows:

Paragraph No./Title

Contents Description

B.2

STT Overview

How the STT waveform transfers weld droplets to the

 

 

weld surface

B.3

STT (Surface Tension Transfer)

How WFS and wave shape parameters effect welding

B.4

STT Wave Design Process

Flowchart and step by step descriptions of the STT

 

 

wave design process

B.5

Primary STT Waveform

How peak current, background current, and tailout

 

Components

speed effect weld droplet transfer

B.6

Secondary STT Waveform

How pinch start, pinch/peak, peak time, and dV/dt

 

Components

detect effect weld droplet transfer

B.7

Application Exercise

Sample development of an STT welding program using

 

 

Wave Designer.

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 DataSoftware Installation Procedure Software InstallationFile Storage Locations 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 Arcscope Using the ARC Scope WindowIntroduction GSF Other ARC Scope OptionsFile Arcscope Overview Wave Designer Troubleshooting Procedure TroubleshootingTroubleshooting Appendix Overview Pulse Wave Shaping PrinciplesAppendix a Figure A-1. Pulse Waveform Parameters Gmaw Pulse OverviewFigure A-2. Weld Droplet Transfer Adaptive Mode Adaptive and NON-ADAPTIVE ModeNON-ADAPTIVE 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