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A-14
A.5 PRIMARY PULSE WAVEFORM COMPONENTS
The following paragraphs describe how peak current, peak time, frequency, and background
current effect weld droplet transfer.
A.5.1 PEAK CURRENT AND PEAK TIME
A combination of peak current and peak time, Figure A-6, applies a force to detach the weld
droplet from the electrode and propel it across the arc. Transition current is the current level
required to achieve weld droplet formation. In order to achieve weld droplet transfer, the peak
current must always be above the spray transition current.
PULSE WAVE SHAPING PRINCIPLES
FIGURE A-6. PEAK CURRENT AND PEAK TIME.
PEAK TIME
FIXED
STICKOUT
WAVE DESIGNER
PEAK
PEAK TIME
SMALLER
DROPLET
LONGER
ARC
Appendix A
PEAK
LARGER
DROPLET
SHORTER
ARC
27850039
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