Everlast PowerTIG 200 EXT, Руководство оператора

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Component Identification and Explanation
Explanation of Functions and Welding Terms
wet in and a generally buttery, but controllable weld. This is less likely
to consume Tungsten as rapidly, but some
“ heat ” loss going into the
weld will be experienced. Use with Lanthanated or Ceriated Tungsten.
Triangular Wave Form. This wave form provides the least amount of
heat and is used on thinner gauges of aluminum. This provides a
longer lasting point, and a better bead profile on thin metal gauges.
Due to the triangular shape of the wave form, the current only stays at
the peaks/valleys a fraction of the time of any other wave form. When
welding with this wave form, the digital display may read a much lower
output amperage from what is set. In simple terms, this is because of
the way the display is calibrated to accurately read the default, Adv.
Square wave with the broad shouldered wave form. The display reads
the
“ averaged ” current due to the less time spent at the peaks. Use
Lanthanated or Ceriated Tungsten for this wave form.
Sine Wave Form . This is the oldest and softest wave form used by
transformer welders before square wave technology became available.
Even though this is a wave form from the fast switching inverter, it
provides a soft feel to the arc, but wet in times are relatively long. Arc
directability, and stability in comparison is poor. Because this wave
form is created by an inverter with fast switching times, the need for HF
overlay used in the older transformers to prevent arc outages (at 60
times a second!) has been eliminated. This arc does not excel in di-
rectability, but may be a more comfortable wave form for users who
transitions from older transformer welders. Use Lanthanated or Ceriat-
ed Tungsten for this wave form.
Welding Amps. This is the main Amperage control. When used in the
context of Pulse, this is the
“ Peak ” part of the pulse while the Pulse
Amps is the “ Base Amp ” part of the pulse. Without Pulse, the main
welding amps simply controls the Amperage of the welder. For Ad-
vanced AC Pulse, this is the AC portion of the Pulse.
Why Doesn ’ t This Unit Have
Continuous HF on AC?
Regardless of wave form, the High Frequency (HF) on this welder is only
used to start the arc. Once the arc is started, the HF shuts off when the arc
transfers. This is possible, because of the fast switching times that there is
virtually no
“ off ” time of the arc as there is with a transformer welder operat-
ing on 60Hz. The transformer welder doesn ’ t modify or change that frequen-
cy. So, in a transformer welder, the arc “ outs ” 60 times a second as it
changes polarity 60 times a second. This is why HF is used to overlay the
arc to provide stability and a continuous arc as the arc hits a
“ dead ” spot.
Inverters take the 60 Hz (50Hz in some regions), break it down, chop it up,
and recompose the welding arc and can deliver switching speeds so fast, that
even welding at AC Hertz frequencies below 50 or 60 Hz, the arc has no
discernable
“ time off ” and no outages, so the arc remains relatively stable