SMART PRO 5.0 Pág. 29
3.3 Welding polarity connection way
3.3 Welding polarity connection way
3.3 Welding polarity connection way
3.3 Welding polarity connection way
MMA
MMA
MMA
MMA
Choosing the connection of DCEN or DCEP is based on the arc stable burning condition. The different
electrodes need different connection way. Please refer to the electrode manual.
TIG
TIG
TIG
TIG
Ar
Wo rk pi ec e
DC EN
We ld in g gu n
GM-3150
2
～
4mm
1、
Place the welding
gun aslant.
2、
Scrape the electrode
with the workpiece.
3、
Lift arc.
Steps of scraping arc
Stricking arc of TIG operation
：
when tungsten electrode touches the workpiece
，
the short-circuit current is
only 28A . After generating arc, current can rise to the setting welding current.If the tungesten electrode
touches the workpiece when welding, the current will drop to 5A within 2s, which can reduce the tungsten
spoilage farthestly
，
prolong the using life of the tungsten electrode
，
and prevent tungsten clipping.
workpiece
Welding holder
electrode
DCEP
GM-3150
workpiece
electrode
DCEN
Welding holder
GM-3150
SMART PRO 5.0
SMART PRO 5.0
SMART PRO 5.0
●
When TIG operation,
the shielded gas is
inputted to welding gun
directly, and the method
of lifting arc is scraping
arc.
