Different signals such as sine waveform, step waveform and exponential waveform are available. Its frequency and phase can be adjusted precisely through the front panel.

RL circuit is taken into consideration, in which the transient current signal includes a period component varying in sinusoidal waveform and a non-period component varying in exponential waveform.

The bonding power of this welder also has a negative decreasing exponential curve. This control rule is easy and helps to realize waveform control method and droplet control.