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USER MANUAL
JEFMIG185-A – JEFMIG210-A
185A MIG WELDER - 230V 50Hz
210A MIG WELDER - 230V 50Hz
www.jeffersontools.com
A spool of welding wire is positioned on the welder’s spool holder and automatically
fed through an insulated liner in the torch to the tip. The torch assembly consists of a
switch, liner, gas hose, and control cable. The switch activates the wire feed roller and
the gas flow. Conversely, 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 end of
the torch. A gas cup fits over the contact tip to direct the gas flow towards the weld
ensuring that the arc welding process is shielded from oxidising air contaminates. The
shielding gas also assists heating of the weld materials. (The welder can also be used
in gasless mode using flux cored wire). The torch is connected to the positive side of
a DC rectifier, and the negative clamp is attached to the workpiece.
IMPORTANT: Should you have no welding experience, we recommend you seek
training from an expert source to ensure your personal health & safety. Good
Mig welding may be achieved only with continued, supervised practice.
7. 1
PREPARATION FOR WELDING
IMPORTANT: BEFORE YOU COMMENCE, MAKE SURE THE MACHINE IS
SWITCHED OFF AT THE MAINS. IF WELDING A CAR, DISCONNECT THE
BATTERY OR FIT AN ELECTRONIC CIRCUIT PROTECTOR. ENSURE YOU
HAVE READ & UNDERSTOOD THE ELECTRICAL SAFETY INSTRUCTIONS
IN SECTION 3.
7.1.1
Connecting the Earth Lead.
To ensure a complete circuit, the earth lead must be securely attached to the
work piece that is to be welded.
a) Best connection is obtained by grinding clean the point of contact on the
workpiece before connecting the earth clamp.
b) The weld area must also be free of paint, rust, grease, etc.
c) When welding a vehicle, be sure the vehicle battery is disconnected or fit
an Electronic Circuit Protector available from your Jefferson dealer.
7.1.2
Power Output switch.
Set the switch to position 1 or 2 for welding up to
2mm thickness. Use settings 3,4,5,6 for thicker welds.
7.1.3
Setting the welder controls.
In principle, the lower the amperage required,
the slower the wire speed. See setting chart for voltage and corresponding
wire speeds. Note: these settings are only a guide and will vary according to
the operators experience.
7.1.4
Welding mild steel.
To weld mild steel you can use CO² gas for most tasks
where spatter and the high build up of weld do not pose a problem. Welding
with a long arc reduces penetration and widens the arc. This in turn results
in more spatter. A long welding arc can be appropriate for welding butt joints
in thin materials. Welding with a short arc, at the same weld settings, results
in greater penetration and a narrower weld
and reduces the amount of spatter. To
achieve a consistent spatter free and flat
weld, you must use an Argon/CO² mixture.
7.1.5
To weld aluminium use:
3
Argon gas,
3
0.8mm Contact Tip (MIG927),
3
0.8mm Aluminium Wire, (MIG/2KAL08).
7.1.6
Overload Protection.
Thermostatic
overload protection is provided. When an
overload has occurred, leave the unit to
cool. The thermostat will automatically reset
the unit when the temperature has returned
within limits
7. MIG / MAG Welding
Settings shown as a guide only
Wire 0.6mm Steel
Argon / CO
2
Mix
Voltage Step
1
2
3
4
5
6
Wire Speed
5
6
7
8
9 10
Above: Polarity settings for
welding without gas and with gas
Summary of Contents for JEFMIG185-A
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