Campbell Hausfeld WS0900 Instructions D'utilisation page 5

Operation
(Con't)
Grounding against
any metallic surface
may produce an arc which could cause
sparks and damage eyesight.
7. Hold the electrode rod away from the
grounded work piece or workbench.
Turn on the welder.
8. Position the electrode to begin weld,
lower the welding helmet or position
the hand shield, and strike an arc.
Adjust weld amperage as needed.
9. When finished welding, turn welder
off and store properly.
DUTY CYCLE / THERMOSTATIC
PROTECTION
Welder duty cycle is the percentage of
actual weld time that can occur in a ten
minute interval. For example, at a 10%
duty cycle, actual welding can occur for
one minute, then the welder must cool
for nine minutes.
Welding Guidelines
General
This line of welding machines utilizes a
process known as Shielded Metal-Arc
Welding (SMAW). This process is used to
bond metals by heating them with an
electric arc created between the
electrode and the work piece.
Electrodes used for shielded metal arc
welding have two parts. The inner core is
a metal rod or wire that should be similar
in composition to the base metal. The
outer coating is called flux. Various types
of flux exist. Each coating is used for a
particular welding situation.
While the metal is molten, it can be
contaminated by elements in the air. This
contamination could weaken the weld.
The flux coating creates a protective
barrier called slag that protects the
molten metal from contaminants.
When current (amperage) flows through
the circuit to the electrode, an arc is
formed between the end of the electrode
and the work piece. The arc melts the
electrode and the work piece. The melted
metal of the electrode flows into the
molten crater and forms a bond with the
work piece as shown in Figure 10.
Models WS0900, WS090001, WS0950, WS1000 and WS1020
Internal components of this welder are
protected from overheating with an
automatic thermal switch. A yellow
lamp is illuminated on the front panel
(on/off switch) if the duty cycle is
exceeded. On Model WS090001, the
yellow lamp is located next to on/off
switch. Welding operations may
continue when the yellow lamp is no
longer illuminated.
Maintenance
Disconnect power
supply and turn
machine off before inspecting or
servicing any components.
Before every use;
1. Check condition of weld cables and
immediately repair or replace any
cables with damaged insulation.
2. Check condition of power cord and
immediately repair or replace any
cord if damaged.
Wire
Slag
Weld
Figure 10 - Weld Components
NOTE: Discontinue using and discard
electrodes that burn down to 1 to 2
inches from the electrode holder.
STRIKING AN ARC
Place the bare end of the electrode in
the holder. Grip the holder lightly to
reduce tiring of the hand and arm.
NOTE: Always keep the jaws of the
holder clean to insure good electrical
contact with the electrode.
Be careful not to
touch the work
piece or welding bench with the
electrode as this causes arc flashes.
The best method of striking an arc is the
scratching method. Drag the electrode at
an angle along the surface much like
striking a match. Upon contact with the
plate, lift the electrode approximately
5
3. Check condition of electrode holder
insulating pieces and immediately
replace cracked or missing insulators.
Verify that all fasteners are tight and
insulated.
with cracked or missing insulation on
welding cables, electrode holder, or
power cord.
Every 3 months;
Replace any unreadable labels on the
welder. Use compressed air to blow all
dust and lint from the ventilation
openings.
1/16" off the surface or it will stick (See
Figure 11).
Flux
Work
Piece
Crater
Same as Electrode Diameter
Figure 11 - Scratching Method
NOTE: Should the electrode stick to the
work piece, break it loose by quickly
twisting or bending at the holder while
pulling upward. If the electrode does not
break loose, disengage the electrode by
releasing it from the holder.
ELECTRODE TYPE AND SIZE
Two types of electrodes are
recommended for this welder. The
electrodes are commonly known by the
AWS (American Welding Society)
designation as follows:
1. E-6013 GENERAL PURPOSE
• All position, smooth deposit rod with
low spatter.
• For all mild steel and general purpose
work.
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Do not operate this
welding machine
1/16"