Yeswelder CT2050, Operator'S Manual

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tc tp
I0 I2
I1
tu td
I0-Initial Current, I1-Welding Current, I2-Pilot Arc Current,
tu-Upslope Time, td-Downslope Time
tp-AC Period, tc-Cathode Current Time
Fig 16 AC Square Wave TIG Current Change Waveform
In AC square wave TIG welding, the pre-flow time and post-flow time are the same with those in DC TIG welding, and others are de-
scribed as below.
Ÿ
Initial Current (I0), Welding Current (I1) & Pilot Arc Current (I2): The preset value of the three parameters is approximately the
absolute average of the practical welding current, and can be adjusted according to users' technical requirements.
Ÿ
Pulse Frequency (1/tp): It can be adjusted according to users' technical requirements.
Ÿ
Cleaning Strength (100%*Tc/Tp): Generally, in AC welding, when taking the electrode as an anode, the current is called cathode
current. Its main function is to break up the oxidized layer of the workpiece, and the cleaning strength is the percentage of cathode
current holding in the AC period. This parameter is 10~40% commonly. When the value is smaller, the arc is concentrative, the
molten pool is narrow and deep, and when it is bigger, the arc is dispersive, molten pool is wide and shallow.
Process Parameter Description 220V 110V Default
AC TIG
PRE GAS Pre-flow 0.1~15s 0.1~15s 0.3s
Istart Initial Current 5~160A 5~80A 15A
SLOPE UP UpSlope Time 0~10s 0~10s 0s
I1 Peak Current 5-200A 5~160A 50A
SLOPPE DOWN Downslope Time 0~15s 0~15s 0s
Istop Crater Current 5~200A 5~100A 15A
POST GAS Post-flow 0.1~15s 0.1~15s 2s
AC Hz AC Frequency 20-250Hz 20-250Hz 85Hz
AC BALANCE Clearance Width
5-99A: 20-80%
100-200A: 20-65%
5-99A: 20-80%
100-160A: 10-65%
AC Square Wave TIG Welding
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