9
The different electrodes need different connections i.e.- polarity.
Please refer to the electrode manual.
3.3.2 TIG SET UP
2
～
4mm
1、
Place the welding
gun aslant.
2、
Scrape the electrode
with the workpiece.
3、
Lift arc.
Steps of striking the arc.
Striking the arc for TIG operation
：
when tungsten electrode touches the workpiece
，
the
short-circuit current is only 10A. After generating arc, current can rise to the preset welding
current. If the tungsten electrode touches the workpiece when welding, the current will drop to
10A within 2s, which can reduce tungsten spoilage
，
prolong the using life of the tungsten
electrode
，
and preventing tungsten clipping.
●
For TIG operation, the shielded gas is
inputted to welding torch directly, and
the method of lifting arc is adopted.
(Scratch TIG and MMA)
Summary of Contents for ARCOSTICK MMA 180
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Page 24: ...21 5 3 Electrical principle drawing 180 system chart ...
