
12
prevent this, regularly remove the wire from the
cable, and blow dry compressed air down the gun
neck with the contact p removed. If necessary
remove the liner and replace it if becomes worn
and irregular or dicult feeding or gas ow is ob-
served. NOTE: (Binzel/Tramet 15 series) When
removing the shielding gas nozzle, twist the nozzle
like a screw to install or remove as it grips the noz-
zle ghtly. There is a special retaining spring un-
der the nozzle that acts as a thread. This feature
allows you to posion the nozzle in order to vary
the depth of the contact p for dierent welding
applicaons.
4) Shielding gas selecon and use. For MIG opera-
on, selecon of the proper shielding gas is im-
portant. Remember, each shielding gas mixture
and ller metal thickness will require a dierent
seng of voltage and amps. A 75/25 (75% Ar-
gon/25%CO2) mixture is recommended for general
purpose steel welding. This yields the best results
in most circumstances. To reduce spaer further,
other blends of Ar/CO2 with higher percentages of
Argon (a true inert gas) may be used. The puddle
may be dicult to control and cold lap may occur if
the mix is over 85% Argon, especially if used in out
of posion welds. Generally, when there is a high-
er percentage of Argon present in the mix, the cost
of the mix will be greater. Though less desirable,
100% CO2 may also be used. Greater penetraon
with a narrower bead prole can be achieved with
100% CO2. However, extra spaer, smoke and
oxidaon will be noced. CO2 is not a a true inert
gas so it can impart a dull gray, and even aky ap-
pearance to the weld as it interacts with the molten
metal. If 100% CO2 is used, regularly check to en-
sure the regulator is not freezing up. CO2 oers a
cheaper opon but losses in transfer eciency
(amount of metal actually deposited versus total
amount consumed) and extra me spent for clean-
ing spaer may negate inial cost savings. For
Stainless, a commercial Tri-mix of gas is generally
used for short circuit transfer. This is usually a pro-
prietary % blend of Argon, Helium, and CO2. Con-
sult with your local welding supply store. For alu-
minum, 100% Argon must be used.
5) Regulator and shielding gas ow adjustment.
NOTE: Regulators may be supplied in LPM or CFH.
Please note which has been provided before
starng to weld for future reference. The regula-
tor should always be mounted nearly vercal if not
with a slight upturn (for safety) so that the ball may
oat free. Always stand to the opposite side of the
regulator and slowly open the regulator with the
front and top of the regulator facing away from
you. Gas ow requirements vary in MIG greatly
and a lot depends upon the environment. More
gas will be required in open/dray areas. To avoid
wasng shielding gas, perform some preliminary
test welds. To adjust, decrease gas ow unl the
weld begins to bubble and exhibit porosity. Gradu-
ally increase the gas ow unl the bubbles disap-
pears completely. Crack the adjustment on the
regulator an small addional amount to ensure full
gas coverage. This process will reduce waste and
help ensure you are not introducing oxygen into
the weld. As the pressure drops within the cylin-
der readjustment may be necessary.
6) MIG polarity. When using solid MIG wire, the
polarity should always be electrode posive. This
means the torch should always be connected to
the posive (+) terminal when welding with solid
wire. To check this, open the cover, and inspect
the heavy power cable that runs from the front
end of the wire feeder to the bolted terminals on
the center divider wall that are marked either with
a posive (+) sign or a negave (-) sign. The cable
should be screwed down to the terminal marked
with the (+) sign for solid wire. For ux core, most
(but not all) manufacturers of ux core wire specify
the use of negave (-) polarity. Consult the manu-
facturer’s recommendaons regarding ux core or
dual shield wire polarity before installaon. If neg-
ave polarity is required, swap the feeder cable to
the negave terminal. Always make sure the ter-
minal screw is fully ghtened. Do not over ghten
the terminal or it may strip out the terminal
threads. If, aer switching between solid and ux
core wire, an errac arc is noced, double check
the polarity. This is a commonly overlooked part
of the changeover procedure.
7) Volt and Amp adjustment. The welder features
innite adjustment of voltage and wire feed speed
within each range. Wire speed adjustment is di-
rectly related to amp output and the terms are
generally used interchangeably. As wire speed in-
creases so does amperage and vice versa. In many
welding charts and calculators, you may nd actual
amperage sengs rather than a wire speed seng.
Amperage output also depends upon the diameter
of the wire as well. Both volts and amps are cali-
brated in numbers ranging from 1-10 with innite
adjustment possibility between each number.
These are relave numbers and are used only as a
reference when repeang the same or similar set-
Introduction and Specifications
Section 1