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OPERATION
Operation of this welder consists of selecting
and adjusting operating controls for optimum
voltage (welding heat) and wire speed
settings.
CONTROLS AND INDICATORS
WARNING
Electric shock can kill! Whenever the Torch
Trigger switch is in the ON position, the weld-
ing circuit is activated. Under this condition,
an arc will occur if the welding wire or any
part of the welding circuit comes in contact
with welding ground.
POWER SWITCH - The power switch sup-
plies electrical current to the welder.
Whenever the power switch is in the ON
position, the welding circuit is activated.
ALWAYS turn the power switch to the OFF
position and unplug the welder before per-
forming any maintenance.
VOLTAGE SELECTOR - The voltage selec-
tor controls the welding heat. The voltage
selector is labeled "MIN" and "MAX". MIN is
the lowest heat and MAX is the highest.
Refer to the label inside the welder side door
(or on page 29 of this manual) for recom-
mended voltage selector settings for your
welding job. Switch position "MAX" produces
the rated output of 80 amps.
WIRE SPEED CONTROL - The wire speed
control adjusts the speed at which the wire is
fed out of the welding torch. The wire speed
needs to be closely matched (tuned-in) to the
rate at which it is being melted off. Some
things that affect wire speed selection are the
type and diameter of the wire being used, the
heat setting selected, and the welding position
to be used.
Note: The wire will feed faster without an
arc. When an arc is being drawn, the wire
speed will slow down.
TUNING IN THE WIRE SPEED
This is one of the most important parts of
MIG welder operation and must be done
before starting each welding job or whenever
any of the following variables are changed:
heat setting, wire diameter, or wire type.
1. Connect the Ground Clamp to a scrap
piece of the same type of material which
you will be welding. It should be equal to
or greater than the thickness of the actual
work piece, and free of oil, paint, rust,
etc.
2. Select a heat setting.
3. Hold the torch in one hand, allowing the
nozzle to rest on the edge of the work-
piece farthest away from you, and at an
angle similar to that which will be used
when welding. (See HOLDING THE
TORCH on page 15 if you are uncertain
of the angle at which you will be welding)
4. With your free hand, turn the Wire Speed
Dial to maximum and continue to hold
onto the knob.
WARNING
EXPOSURE TO A WELDING ARC IS
EXTREMELY HARMFUL TO THE EYES
AND SKIN! Prolonged exposure to the
welding arc can cause blindness and burns.
Never strike an arc or begin welding until you
are adequately protected. Wear flameproof
welding gloves, a heavy long sleeved shirt,
cuffless trousers, high topped shoes, and a
welding helmet.
5. Lower your welding helmet and pull the
trigger on the torch to start an arc, then
begin to drag the torch toward you while
simultaneously turning the Wire Speed
Dial counter-clockwise.
6. LISTEN! As you decrease the wire speed,
the sound that the arc makes will change
from a sputtering to a high-pitched
buzzing sound and then will begin sput-
tering again if you decrease the wire
speed too much. The point on the wire
speed adjustment where the high-pitched
buzzing sound is achieved is the correct
setting.
15
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