Everlast PowerMTS 251Si Operator's Manual page 53

Section 3
achieved by using a dedicated stainless
steel brush to remove the oxide layer and
using acetone or aluminum cleaner before
welding to remove any residues. Even
though aluminum may appear shiny and
clean, it still has an oxide layer and a thin
layer of oil left over from the manufactur-
ing process. Some soot will appear in most
Aluminum MIG welds but if a lot is noticed,
you have either contaminated metal, or
insufficient gas flow. You can also induce
turbulence by having too much of a torch
angle. Start with a 90 degree angle and
then lean the gun slightly (about 15 de-
grees) to the "push" position. Welding
aluminum is not typically a short circuit
process. It is a spray transfer process or a
Pulsed-Spray process. Spray and Pulsed-
Spray transfer are processes that are used
to weld many metals, but in Aluminum it
must be used to obtain the most sound
quality welds.
3. Spool Gun Selection. When using the op-
tional spool gun, the amp/wire speed con-
trol is controlled on the spool gun. You
must purchase a MTS version of the spool
gun to operate correctly. You may pur-
chase a compatible spool gun directly from
Everlast for your unit. For the best match-
up, we recommend the Parker
4. Flux-Core Operation. Flux-Core welding
requires the use of serrated drive rollers.
These grip the wire and feed it correctly at
a steady speed. Flux- Core drive rolls are
available for purchase as an optional item.
Full time use of Flux-Core filler wire will
require the purchase of a flux-core specific
gun. Everlast does not supply this type of
gun, but many after-market Gun suppliers
can supply a Flux -core gun with a Euro-
connect fitting and will work. Part-time or
occasional Flux-core use with the standard
Basic Theory and Function
MIG gun is acceptable as long as the nozzle
is kept free of spatter.
5. When running this unit on a generator, the
manufacturer of the generator must certi-
fy it as a having " Clean Power" output.
This means the unit produces a truer sine
wave and is not a modified sine wave gen-
erator and is largely free from harmonic
distortion. A clean power generator is usu-
ally listed as such, but the manufacturer of
the generator should be able to clarify the
clean power status of the generator
through the technical department of the
generator manufacturer. Everlast does not
keep a list of approved generators nor
does it make endorsements of generators
that are listed as clean power output. The
generator power requirement for this unit
is unit is 8500 continuous watts with a
surge capacity of 12,000 watts required.
6. MIG/TIG 2T/4T settings for the sequencer.
For TIG, the 2T/4T feature allows opera-
tion without a foot pedal. In many circum-
stances, a foot pedal is not practical for
use. So, the 2T/4T function has been cre-
ated to allow sequencer programming of
the welder to simulate the activities of the
foot pedal while providing more accurate
control. In TIG mode you are controlling
Pre-Flow, Post-Flow, Up and Downslope of
the Amps with the sequencer. For MIG,
the 2T/4T feature allows control of the se-
quencer programming giving the user the
choice of operation styles. This allows the
unit to be operated without keeping the
trigger pressed. This allows the user to
improve productivity while reducing fa-
tigue. In some circumstances, it allows the
unit to be used with some auto-welding
machines. When used in MIG mode, you
are controlling the Pre-flow, Post-Flow, Up
and downslope of the Volts with the se-
quencer. NOTE: For MIG operation, the
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