Weldtronic TTIG200PADP Operating Manual page 31

TIG welding （4T operation）
The start current and crater current can be pre-set. This function can compensate the possible crater that
appears at the beginning and end of the welding. Thus, 4T is suitable for the welding of medium thickness
plates.
Introduction ：

0：Press and hold the gun switch, Electromagnetic gas valve is turned on. The shielding gas stars to
flow;

0～t1：Pre-gas time (0~2S);

t1～t2：Arc is ignited at t1 and then output the setting value of start current;

t2： Loosen the gun switch, the output current slopes up from the start current;

t2～t3：The output current rises to the setting value (Iw or Ib), the upslope time can be adjusted;

t3～t4：Welding process. During this period, the gun switch is loosen;
Note: Select the pulsed output, the base current and welding current will be outputted alternately;
otherwise, output the setting value of welding current;

t4： Press the torch switch again, the welding current will drop in accordance with the selected
down-slope time.

t4～t5：The output current slopes down to the crater current. The downslope time can be adjusted;

t5～t6：The crater current time;

t6：Loosen the gun switch, stop arc and keep on argon flowing;

t6～t7： Post-gas time can be set by the post-gas time adjustment knob on the front panel（0～
10S）;

t7：Electromagnetic valve is closed and stop argon flowing. Welding is finished.
TitanTig 200P ACDC Pro Operators Manual Issue. A 0516