Jasic EVO 2.0 EM-200CT, Operator'S Manual

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59
LIFT TIG SETUP
Before starting any welding activity ensure that you have suitable eye protection and
protective clothing. Also take the necessary steps to protect any persons within the welding
area.
LIFT TIG welding mode
Terms used: TIG – Tungsten Inert Gas, GTAW – Gas Tungsten Arc Welding.
TIG welding is an arc welding process that uses a non - consumable
tungsten electrode to produce the heat for welding.
The weld area is protected from atmospheric contamination by a
shielding gas (usually an inert gas such as argon or helium) and a filler
rod matching the base material is normally used, though some welds,
known as autogenous welds, are carried out without the need for
filler wire.
The LIFT TIG welding process with the EM - 200CT and EM - 250CT
Machines is in the DC process (Direct Current) for welding steel
and stainless steel etc.
With the EVO range of machines a euro style (as shown below) type
TIG torches can be used.
Using the euro style TIG torch, connect the TIG torch euro style plug to the
(MIG) Euro connector outlet and rotate clockwise to tighten.
Ensure the trailing lead is connected into the “ - ” socket on the front panel of
the machine and fully tightened clockwise.
Insert the dinse plug on the work return cable into the “+” socket on the
front panel of the machine and rotate clockwise to tighten.
Attach the work clamp to the work piece.
Connect the supply gas hose to the gas inlet on the back panel or
the machine. The other end of the supply hose connects to the
gas regulator or flowmeter on the gas cylinder.
Press the gas purge button on the control
panel to activate the gas solenoid to allow
gas to flow, this will allow you to set the
gas flow level.
Adjust the welding current according to the thickness of the work
piece to be welded (for a guide to TIG welding parameters, please refer to the table below).
Allow the TIG torch tungsten to touch the work piece and then press the torch trigger.
Gas will then start to flow, output voltage will also activate and then lift the TIG torch 2 ~ 4mm away
from the work piece and the arc will initiate and the welding will commence and be maintained at the
preset welding, welding can be carried out.
Releasing the torch trigger will stop the welding arc
although the shielding gas will continue flowing for
the preset post flow time, welding then ends.
The amperage guide for TIG welding tungsten sizes
can vary depending on material, work piece
thickness, welding position and joint form.
Tungsten Size DC – Electrode Negative
1.0mm 15 – 80A
1.6mm 70 – 150A
2.4mm 150 – 250A
3.2mm 250A – 400A