Lincoln Electric IM649 Wave Designer - Manual (Page 46)

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.
FIGURE A-6. PEAK CURRENT AND PEAK TIME.
A-14 Appendix A PULSE WAVE SHAPING PRINCIPLES
WAVE DESIGNER
27850039
PEAK TIME
PEAK TIME
SMALLER LARGER
DROPLET DROPLET
LONGER SHORTER
ARC ARC
FIXED
STICKOUT
PEAK
PEAK