Yeswelder CT2050 Operator's Manual page 28

AC Pulse TIG Welding
AC pulse TIG welding is almost the same as AC square wave TIG welding, and what makes them different is that in AC pulsed TIG
welding, the welding current varies with the pulse, peak current, and base current is generated because the welding current is con-
trolled by a low-frequency pulse. The preset peak current and base currents are the low-frequency pulse peak value (average
value) and base value (average value) respectively. For the AC square wave parameter selecting and setting, please refer to the
corresponding contents in AC square wave TIG welding. For the pulse frequency and pulse duration ratio, users may refer to the
corresponding contents in DC pulsed TIG welding. The pulse frequency (1/T) is a little low, and it can be adjusted between 0.5Hz
and 5Hz. The pulse duration ratio (Tp/T) can be adjusted between 10% and 90%.
AC Pulse TIG
Process
AC Pulse TIG
DUTY CYCLE (I1:I2)
SLOPPE DOWN
AC BALANCE
tu Tp
tc-Cathode Current time, tp-AC Period
Tp-Pulsed Peak Current Time, T-Pulse Period
Fig 17 AC Pulse TIG Current Change Waveform
Parameter Description
PRE GAS Pre-flow
Istart Initial Current
SLOPE UP UpSlope Time
I1 Peak Current
I2 Background Current
PULSE(Hz) Crater Current
Post-flow
Downslope Time
Istop Crater Current
POST GAS Post-flow
AC Hz AC Frequency
Clearance Width
tc
T
tp
220V
0.1~15s
5~160A
0~10s
5-200A
I1*10%-I1 A
0.2-200Hz
10%-90%
0-15s
5-200A
0.1-15s
20-250Hz
5-99A: 20-80%
100-200A: 20-65%
25
td
110V
0.1~15s
5~80A
0~10s
5~160A
I1*10%-I1 A
0.2-200Hz
10%-90%
0-15s
5-100A
0.1-15s
5-99A: 20-80%
100-160A: 10-65%
Default
0.3s
15A
0s
50A
50A
0.5Hz
0s
15A
2s
85Hz