gala gar Smart Tig 310 PACDC Manual Técnico De Instrucciones página 46

Smart Tig 310 P ACDC
Pág. 46
Current change in AC TIG spot welding
Current change in AC pulsed TIG spot welding
5.5.7 Complex waveform TIG welding
Ip Id
T2
T2
Ib
Current change in complex waveform DC pulsed welding
This machine can obtain complex waveform TIG welding through programming. Special pulsed welding can be
obtained in DC TIG mode, dual-pulse welding can be obtained in pulsed TIG mode, and variable polarity pulsed
welding can be obtained in AC TIG mode. To obtain complex waveform TIG welding, it is necessary to select the
appropriate TIG operation mode or reprogram the TIG operation mode according to the appendix Programming
Guide for Users (TIG mode). Take complex waveform DC pulsed welding for example. By adding a pulsed current
with higher frequency to the peak pulsed current with lower frequency, some special welding requirements can be
met. Complicated complex waveform DC pulsed welding can be obtained by selecting the operation mode 18/19 or
self-programming in pulsed welding mode. A typical waveform of complex waveform DC pulsed welding (operation
mode 18) is showed in the above figure, in which, Ib and Ip stand for the base current and peak current in pulsed
welding mode respectively. Id 's value is equal to that of the pilot arc current, but it has no sense of pilot arc
current, and it can be considered as secondary base current. T2 stands for the period of the secondary pulse (LF),
and here in this example T2 is 200ms. In operation mode 19, the period of the secondary pulse (LF) can be
changed at any moment by adjusting the upslope time.