GRAND TIG 200 AC DC PULSE PFC MV
Characteristics
：
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MCU control system, responds immediately to any changes.
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High frequency and high voltage for arc igniting to ensure the success ratio of
igniting arc, the reverse polarity ignition ensures good ignition behavior in
TIG-AC welding.
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Avoid AC arc-break with special means, even if arc-break occurs the HF will
keep the arc stable.
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Pedal control the welding current.
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TIG/DC operation, If the tungesten electrode touches the workpiece when
welding, the current will drop to short-circuit current to protect tungsten.
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Intelligent protection: over-voltage, over-current, over-heat, when the problems
listed before occurred, the alarm lamp on the front panel will be on and the
output current will be cut off. It can self-protect and prolong the using life
.
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Double purposes: AC inverter TIG/MMA and DC inverter TIG/MMA.
- Excellent performance on Al-alloy, carbon steel, stainless stell, titanium.
According to choosing the front panel functions, the following six welding ways
can be realized.
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DC MMA
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DC TIG
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DC Pulse TIG
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AC MMA
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AC TIG
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AC Pulse TIG
1. For DC MMA
, polarity connection can be chosen according to different
electrodes;
2. For AC MMA
, magnetic flow caused by invariable DC polarity can be avoided
；
3. For DC TIG
, DCEP is used normally (workpiece connected to positive polarity,
while torch connected to negative polarity). This connection has many
characters, such as stable welding arc, low tungsten pole loss, more welding
current, narrow and deep weld;
4. For AC TIG
(rectangle wave), arc is more stable than Sine AC TIG. At the same
time, you can not only obtain the max penetration and the min tungsten pole
loss, but also obtain better clearance effect.
5. DC Pulsed TIG
has the following characters: 1) Pulse heating. Metal in Molten
pool has short time on high temperature status and freezes quickly, which can r
educe the possibility to produce hot crack of the materials with thermal
sensitivity. 2) The workpiece gets little heat. Arc energy is focused. Be suitable for
thin sheet and super thin sheet welding. 3) Exactly control heat input and the size
of the molten pool. The depth of penetration is even. Be suitable for welding by
one side and forming by two sides and all position welding for pipe. 4) High
frequency arc can make metal for microlite fabric, eliminate blowhole and i
mprove the mechanical performance of the joint. 5) High frequency arc is suitable
for high welding speed to improve the productivity.
