Internal Thermal Protection; Controls And Indicators; Preparations For Welding; Setting Up The Work Piece - Craftsman 196.205680 Manual Del Usuario

CAUTION
Do not constantly exceed the duty cycle or
damage to this welder can result.
INTERNAL THERMAL
PROTECTION
If you exceed the duty cycle of your welder,
an internal thermal protector will open and
shut off all welder functions. After cooling,
the thermal protector will automatically reset
and the welder will function normally again.
Prepare an organized, well lighted work
area (see Figure 5).
Provide protection for the eyes and skin
of the operator and bystanders.
Set up the work piece and make the
ground clamp connection.
Select the electrode.
Adiust the heat control.
I I
CONTROLS AND INDICATORS
_
WARNING
ELECTRIC SHOCK CAN KILL!
To remove the risk of electric shock, be
aware that the POWER switch, when OFF,
does not remove power from all internal cir-
cuitry in the welder.
The POWER SWITCH controls the main
power to the welder and lights up when the
welder is ON. When the switch is OFF, there
is still power to some areas of the welder.
When working inside the welder or when
removing panels on the welder, make sure
the welder is unplugged from the wall outlet.
Figure 5. Work Area
_1 WARNING
Exposure to a welding arc is extremely
harmful to the eyes and skin. Prolonged
exposure to a welding arc can cause
blindness and burns. Never strike an arc or
begin welding unless you are adequately
protected. Wear flameproof welding gloves,
heavy long sleeved shirt, cuffless trousers,
high topped shoes and a welding helmet.
The VOLTAGE SELECTOR allows you to
select minimum and maximum heat settings.
Refer to the instruction label inside the
welder's hood (or to the Suggested Settings
Chart on p.30 of this manual) for suggestions
on which heat setting to use for your welding
job.
PREPARATIONS FOR WELDING
An important factor in making a satisfactory
weld is preparation. This includes studying
the process and equipment and then practice
welding before attempting to weld finished
product. An organized, safe, convenient,
comfortable, well-lighted work area should be
available to the operator. The work area
should specifically be free of all flammables
with both a fire extinguisher and bucket of
sand available.
To properly prepare for welding, it is
necessary to:
12
SETTING UP THE WORK PIECE
Welding Positions
Welding with an ac wire welder can be done in
any of three basic positions: Flat, Horizontal,
and Vertical. Flat welding is generally easier,
faster and allows for better penetration. The
heat (amperage) selections will be affected by
the positions. Vertical welding is usually only
attempted when using a dc welder. If possible,
the work piece should be positioned so that
the bead will run on a flat surface.
PREPARING THE JOINT
For effective welding, the surfaces to be
joined must be free of dirt, rust, scale, oil or
paint. Welding on metals not properly
cleaned will cause a brittle and porous weld.
If the base metal pieces to be joined are thick
or heavy, it may be necessary to bevel the
edges, with a metal grinder, at the point of