Weldarc 200 AC/DC | Operator Manual | Model No MC114-2
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Fig 12 Lift TIG Operation Procedure
HF TIG can be used where work piece
contamination by the electrode is a
concern. Also where repetitive starts
causes contamination of the electrode,
which produces an unstable arc.
LIFT TIG Operation
When the Welding mode is set to LIFT TIG
then the arc start can be achieved with the
following procedure.
1 Touch the electrode lightly against the
work piece.
2 Press the torch trigger switch. The
shielding gas will start to flow and a small
current will pass through the electrode.
3 While still holding the electrode against
the work piece, roll the hand piece over
until the cup rests on the work piece.
Use the cup as a pivot point to roll the
hand piece over allowing the electrode
to lift of the work piece.
The arc will ignite.
4 Immediately lift the cup of the work
piece, the current will rise to the welding
level within the up-slope time.
Use of a copper striking plate can be
used to avoid electrode contamination.
The electrode can also be contaminated
by contact with the filler rod.
A contaminated electrode produces an
unstable arc. If this occurs regrind the
electrode tip.
7 BASIC WELDING INFORMATION
TIG Welding Operation
Connect the Work Clamp to the work piece.
Turn on the power switch located on the rear
panel. Wait approximately 5 seconds as the
unit goes through its initiation sequence.
Use the Weld Mode Selection Switch to
select LIFT TIG or HF TIG Mode.
Select an appropriate welding current for
the job by setting the knob on the machine
front panel.
HF Start
When HF Start TIG is selected then the
electrode tip is bought close to the work
piece, but not touching.
Pressing the trigger will produce a high
voltage spark that will jump to the work
piece and initiate an arc.
HF TIG can be used where work piece
contamination by the electrode is a
concern. Also where repetitive starts
causes contamination of the electrode,
which produces an unstable arc.
TIG Welding Operation
Connect the Work Clamp to the work piece.
Turn on the power switch located on the rear
panel. Wait approximately 5 seconds as the
unit goes through its initiation sequence.
Use the Weld Mode Selection Switch to
select LIFT TIG or HF TIG Mode.
Select an appropriate welding current for
the job by setting the knob on the machine
front panel.
HF Start
When HF Start TIG is selected then the
electrode tip is bought close to the work
piece, but not touching.
Pressing the trigger will produce a high
voltage spark that will jump to the work
piece and initiate an arc.
