Operation; Controls And Indicators - Craftsman 196.205040 Manual Del Usuario

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
POWER switch is in the ON position, the
welding 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
supplies 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
performing any maintenance.
VOLTAGE SELECTORS - The voltage
selector switch and dial control the welding
heat. The voltage selector switch is label
MIN/MAX, referring to minimum and maxi-
mum voltage output. The voltage selector
dial is lettered A-C. Letter A is the lowest
heat and letter C is the highest. Refer to the
label under the welder hood (or on page 32
of this manual) for recommended voltage
selectors settings for your welding job.
Switch position "MAX" and dial position "C"
produce the rated output of 150 amps.
WIRE SPEED CONTROL - The wire speed
control adjusts the speed at which the wire is
fed out of the welding gun. 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. Set up and ground 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 gun 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 GUN
on page 18 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 gun to start an arc, then
begin to drag the gun 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 sputtering 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.
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