OPERA
TING INSTR
UCTIONS
37
MIG 140 INVERTER WELDER 058-9305-6
Striking the arc
1. Scratch the work piece (1) with the end
of electrode (2) to start the arc and then
raise it to a gap of 1/8" between the
electrode and the work piece
(fig j).
2. Maintain the gap between the electrode
and the work piece during welding.
Note: If the gap is too narrow, the electrode will
stick to the work piece. If the gap is too wide, the
arc will extinguish.
3. Gently rock the electrode back and forth to
separate the electrode from the work
piece when they stick together.
Note: A stuck electrode will cause a short circuit
and the thermal overload protection will shut the
welder OFF.
4. Make sure the arc is accompanied by a
crisp cracking sound, as it indicates a
proper arc.
5. Move the electrode (1) downwards along
required direction to lay a weld bead
(fig k).
DANGER!
Potential hazard that will result in serious injury or loss of life.
•
Prolonged exposure to the welding arc can cause blindness and burns.
•
Never strike the arc or start welding without any adequate protection.
•
Wear flameproof welding gloves, a heavy long
-
sleeved shirt, trousers
without cuffs, high
-
topped shoes, and an ANSI
-
approved welding helmet.
1/8"
MC-589305-39
1
2
fig j
MC-589305-40
fig k
1
