Full Product Manual
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desired, particularly on thin aluminum. Total heat
output is affected regardless of the amperage select-
ed. In the Triangular wave form maximum output
will seem colder with less aggressive wet in and
colder fusion. Using the triangular wave form at
the same amperage of the Advanced Square wave
form will demonstrate the stark difference. You
should notice a colder puddle with a different bead
prole. The soft square wave, offers a buttery arc,
with a smooth, easy feel similar to the feel of a
standard square wave transformer-based welder.
The soft square wave may be preferred by older,
more experienced welders, who have spent time on
transformer machine welders. The Sine wave is the
wave form of older style transformer welders. This
provides a soft, but capable arc for those that desire
a more traditional behavior from their welder. Heat
output and wet-in will seem somewhat muted in
comparison to the Advanced Square wave. At the
beginning, for al our users, regardless of experi-
ence, we suggest that you use the Advanced Square
wave until you are familiar with the machine.
AC Frequency. The AC frequency only applies to
the AC mode. Standard transformer welders typi-
cally have a xed frequency of 60 Hz which is es-
sentially the line input frequency supplied by the
power company. But with inverters, the capability of
AC frequency adjustment is practically limitless due
to the IGBT components that create its own frequen-
cy. Frequency adjustment capability is useful to
help improve directional control of the arc, and to
focus the arc so that a narrower bead prole can be
achieved. Also, at higher frequencies, the puddle
agitation is greater which improve the breakup of
undesirable oxides. All wave forms can be adjusted
from 20-200 Hz.
The AC output is formed by rapidly alternating
polarity between electrode negative and electrode
positive, creating something that resembles a wave
when viewed on an oscilloscope. Normally, with
standard transformer welders, both standard sine
wave and even square wave welders have little or no
way to change the ratio of EN to EP, which results in
welding with a molten ball at the tip of the tungsten
and a less stable arc. Electrode negative (EN) pro-
AC TIG Operation.
AC TIG operation is a new and unique feature for
compact MIG/TIG/Stick multi-process units. With
that said, this welder is a well developed machine,
with both HF start and AC TIG/AC Pulse TIG fea-
tures with industrial capability in all processes. To
be capable of all processes, there are some equally
unique technological challenges to address. Ever-
last has sought to include everything possible with-
out compromising performance or quality without
over complicating the machine. While it is certain
that others in the industry will follow Everlast’s rst
to market model, none will likely be as simple and
convenient to operate with less points of failure. In
order to eliminate the most points of failure possi-
ble, we have chosen to include a separate circuit for
AC, which outputs directly from the AC part of the
inverter to a separate AC terminal (DINSE connect-
or) that is to be used with the work clamp only
when in AC TIG or AC Pulse TIG modes. By doing
this, we have isolated possible interference from the
AC side of the machine with other circuits used for
other processes. This has simplied internal struc-
ture and reduced the need to compromise perfor-
mance. But you will always need to make sure that
the work clamp is moved over to the AC terminal
when you change over to AC TIG. You will not
need to move the torch, as it will always stay in the
negative terminal. If you do not manually relocate
the work clamp to the AC output terminal, you will
experience erratic operation, and in the long term,
possibly incur damage the internal components.
With the addition AC to the unit, there are a few
more items that should be covered in greater detail
to help the user to understand exactly what is going
on.
AC Wave Forms. The wave form control is a useful
feature for achieving a desired type of arc perfor-
mance in AC mode. There are 4 wave forms to
choose from. These are the most commonly found
forms, though there are other types of wave forms.
The standard, default wave form is the advanced
square wave. This wave form is excellent for all
types of welding, and offers quick puddle wet-in,
and good arc stability. The triangular wave form is
useful in situations where a fast freezing puddle is
TIG OPERATION AND THEORY
Section 3 Basic Theory and Function