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Figure 7-7 Current waveform of DC pulse TIG
I1-Initial current t0-Pre-flow time
I2-Current during up-slope time t1-Initial current period
I3-Pre-set pulse current t2-Up-slope time
I4-Current during down-slope time t3-Peak/base current period
I5-Finish current t4-Down-slope time
IP-Pulse peak current t5-Finish current period
Ib-Pulse base current t6-Post-flow time
tb-Pulse base time
tp-Pulse peak time
T-Pulse period
Pulse TIG includes all DC TIG parameters, except that the parameters are set differently. The
parameters will not be explained again here. In addition, there are 4 adjustable parameters,
which are explained separately in conjunction with the figure:
● Peak current (Ip): Maximum pulse current, adjusted according to the process requirements.
● Base current (Ib): Minimum pulse current, adjusted according to the process requirements.
● Pulse frequency (1/T): T=tp+tb, adjusted according to the process requirements.
● Duty cycle (100%*tp/T): the percentage of peak current duration in the pulse cycle,
adjusted according to the process requirements.
The parameters are set as follows:
Enter DC TIG mode, and press the encoder to select the welding parameters to be set. If the
parameter indicator is on, it indicates that the parameter is selected.
Press the encoder once. If the indicator is on, it indicates that the parameter has been
selected; press the encoder clockwise to increase the value, and counterclockwise to
decrease it.
After setting the parameter, press the encoder again to save the current settings, and the
parameter indicator will change to always on.
Set all welding parameters according to the above steps.
Choose the appropriate welding current, tungsten electrode, and shielding gas flow based on
the welding requirements. Refer to the Table 7-3 for details.
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