Lincoln Electric IM649 Manual

A SERVICE OF

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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.

Appendix B B-1

STT WAVE SHAPING PRINCIPLES

WAVE DESIGNER