13
USER MANUAL
JEFMIG151-A
151A MIG WELDER - 230V
~
50Hz
www.jeffersontools.com
11.6.1 Turn the gas regulator knob halfway for a 2ltr/min flow and all the way for
maximum flow of 4ltr/min.
11.6.2 Always remove the flow regulator after use if the machine is to be stored
for any length of time.
11.7
Gas types.
Welding mild steel with CO² gas is appropriate for most
welding tasks where spatter and high build up of
weld do not pose a problem. To achieve a spatter-free and flat weld
however, you must use an CO²/Argon mixture.
To weld aluminium use:
• Argon gas • 0.8mm Contact Tip • 0.8mm Aluminium Wire (MIG/2/
KAL08)
11.8
Cylinder sizes.
The platform at the rear of the welder will support cylinders
up to a diameter of 140mm, a height of 500mm and a maximum weight
of 10kg. If you wish to use larger cylinders they must be properly secured
to a separate welding trolley. An industrial gas cylinder adaptor kit will be
required. Contact your local Jefferson dealer to order these items.
11.8.1 The following table is an estimated duration of cylinders based on a flow
rate of 2 litres per minute. Actual duration will be dependant upon various
job conditions including the operator’s welding technique. All times are
therefore approximate.
11.9
Mig/Mag gas welding principles:
Welding wire is automatically fed through an insulated liner to the tip of the torch. The
torch consists of a switch, liner, gas hose, and control cable. The switch activates the wire feed roller and the gas flow.
Releasing the switch stops the wire feed and gas flow. The weld current is transferred to the electrode (the wire) from the
contact tip at the torch end. The current switches (see section 9.3) control the current to the electrode. Wire speed must
be adjusted according to current output. The higher the current the faster the wire speed. A gas cup fits over the contact
tip to direct gas flow towards the weld, ensuring that the arc welding process is shielded from oxidisation. The shielding
gas also assists heating of the weld. The torch is connected to the positive side of a DC rectifier, and the negative clamp
is attached to the workpiece.
Disposable cylinders:
CO²/100 390g = 1-1/4hours.
CO²/101 600g = 2 hours.
Argon ARG/100 300g = 1hour.
Argon/CO² MIX/100 300g = 1 hour.
Note: When comparing prices, always check fill weights.
FIG. 12
