AWELCO MIG AUTOMIG 130 Manual De Instrucciones página 5

GENERAL DESCRIPTION
MIG welders which can weld flux cored gasless wire. When welding,
use promig jet welding spray to obtain optimal welding. the use of
this product will enhance the binding of the weld and reduce
spattering.
DESCRIPTION OF THE MACHINE
1. ON/OFF switch
2. Min-Max Switch
3. Wire speed regulator (Optional)
4. Check Firmware (Optional)
5. Power LED (Optional)
6. Thermal protection LED
ELECTRICAL CONNECTION
Before connecting the machine to the outlet, check that your
supply voltage is like the machine's voltage and that the power
supply is sufficient to feed the full load machine. Make sure that
the electric plant is provided with a sufficient earth connection.
EARTH CONNECTION
A suitable earth cable connected to a clamp is supplied with the
welding machine. The earth clamp should be attached to the
workpiece itself. It must be a very good connection wherever made,
as a poor or dirty connection will produce difficult welding conditions
and could result in a bad weld.
TECHNICAL INFORMATION
The welding machine has an On-Off switch (1), with luminous
led that indicates the operation of the machine (5). The welder
has a switch (2) that provides 2-position power, to select based on
the power required. Using the knob (3) placed on the frontal you
can regulate the welding wire speed. The knob should be
used in conjunction with the voltage switch to give a smooth and
perfect arc. The machine is fitted with a thermal overload
protection which will automatically interrupt the welding current
on reaching excessive temperatures; in which instance a yellow
pilot light (6) will switch on. Once the temperature has decreased to
a level low enough to allow welding, the light will switch itself off and
the machine is ready for use again.
SPOOLS INSTALLATION
You can use spools of Ø 100mm (0.1 Kg, 0,5 Kg).
WIRE-FEEDER MOTOR
Make sure that the size of the groove in the feed roll corresponds to
the welding wire size being used. The machines are arranged with
ENGLISH
feed roll Ø 0.9mm. The feed roll has the wire diameter stamped on
its side. The machines are equipped with proper K rolls
suitable for welding with flux cored wire without gas protection. In
any case, the machine uses only wire type FLUX.
FEEDING WIRE INTO THE WELDING TORCH (FIG.1)
Cut the first 10 cm of wire and then check that there are no burrs
or distortions at the cut end. Release the small wheel which
is connected to the pressure arm by unscrewing the pressure
screw and pass the wire through the feed roll's groove and then
re-insert the wire into the guide. At this point, make sure that the
wire lies in the feed roll's groove in a natural line. Drop the
pressure arm on the wire and swing it back under the pressure
screw. Pressure on the welding wire is regulated by turning the
pressure screw, the correct pressure being critically important to
the smooth operation of the welding machine. The optimum
pressure is the one which ensures that the wire runs smoothly
though allows the feed roll to slip in the event of a blockage in the
torch. It is possible to adjust the friction of the paddle hub. If the
hub over-runs, then increase the friction pressure in order to
always have the spool wire drawn. On the contrary, if the
friction pressure is too much, some tension can be released to
obtain a regular wire feeding.
TORCH CONNECTION
The torch is connected directly to the welding machine so it is ready
for use. A probable replacement of the torch must be done with care
and if possible by a technician. To replace contact tips, it is
necessary to unscrew or to pull it. Replace tip, check that it
corresponds with the wire size and replace the gas shroud. For good
wire feeding during welding operations, it is essential that the correct
size parts are used for each wire. Always Keep clean the contact tip.
WELDING GUIDE
When welding on the lowest output settings, it is necessary to keep
the arc as short as possible. This should be achieved by holding
welding torch as close as possible and at an angle of approximately
45 degrees to the workpiece.
The arc length can be increased when welding on the highest
settings, an arc length up to 20 mm can be enough when welding on
maximum settings.
GENERAL WELDING TIPS
From time to time, some faults may be observed in the weld owing to
external influences rather than due to welding machine's faults. Here
are some that you may come across :
- Porosity
Small holes in the weld, caused by break-down in gas coverage of
the weld or sometimes by foreign bodies inclusion.
usually, to grind out the weld. Remember, clean well the working
place and finally incline the torch while welding.
· Spatter
5
Remedy is,