12
TIPS
• Keep the welding current as low as possible for the job at hand to maintain the best duty cycle from your
welding machine, prevent the flux from burning and make removal slag easier.
• To break the circuit withdraw the electrode from the work piece. Be careful with the end of the electrode,
as it will be HOT. Provided the current setting is correct, the surface of the work piece will also melt by the
intensity of the electric arc. A degree of “penetration” is thereby obtained, and a complete “fusion” of the
work piece and the deposited electrode is met.
• If the transformer overheats, the overload cut-out protector will activate and cut off. The light will illuminate
to show that the cut out has operated.
• After cooling, the protector will reconnect the supply circuit and the welder will be ready for further use.
Note: If the duty cycle of the machine is exceeded, the thermostatic protection will activate and the
machine will cut out, to cool down.
STARTING THE ARC (SCRATCH)
The welding arc is obtained when the welding current is forced across a gap between the electrode tip and
the workpiece. A welder must be able to strike and establish the correct arc easily and quickly.
The scratching method is easier for beginners. The electrode is moved across the plate inclined at an angle,
as you would strike a match. As the electrode scratches the plate an arc is struck. When the arc has formed,
withdraw the electrode momentarily to form an excessively long arc, then return to optimal arc length.
The optimal arc length, or distance between electrode and puddle, is the same as the diameter of the
electrode (the actual metal part within the flux covering). Holding the electrode too closely to the joint
decreases welding voltage, which creates an erratic arc that may extinguish itself.
Select your required current by turning the
Welding Parameter Adjustment Knob.
Ensure the electrode/electrode holder is
not near the work-piece or it can earth out.
Turn the machine on using the mains power
switch. The front displays will light up and the
cooling fan will start.
5
6
TRIGGER
WELDING WIRE
FLUX COATING
ROD
ARC
CONTACT TIP
DROPLETS
SHIELDING GAS
ARC
MOLTEN WELD METAL
SHROUD
WORK PIECE
WORK PIECE
WORK PIECE
WORK PIECE
WORK PIECE
WORK PIECE
WORK PIECE
WORK PIECE
STRAIGHT GROUND
CORRECT PREPERATION
- STABLE ARC
INCORRECT PREPERATION
- STABLE ARC
RADIAL GROUND
ARC WANDER
TUNGSTEN ELECTRODE
GAS LENS
STABLE ARC
FLAT TIP
POINTED TIP
GRINDING WHEEL
GRINDING WHEEL
FILLER WIRE
Note: Do not use wheel for other jobs or tugsten can become contaminated and cause lower weld quality
