Weco Multi Power 204T Instruction Manual page 32

Cod. 006.0001.1420
08/09/2021 V.2.12
ENGLISH
The maximum and minimum TIG welding current values can be set with the foot pedal control.
The up and down slopes cannot be controlled via the foot pedal.
The following welding procedures can be selected with the foot pedal:
2T LIFT-ARC
If both remote controls are connected, the foot pedal assumes priority over the UP/DOWN or poten-
tiometer TIG torch.
When this function is active welding is performed without the following parameters:
• UP SLOPE
• DOWN SLOPE
• All special functions
*2: This parameter is set as a percentage referred to the value of the following parameter: WELDING
CURRENT
- SPOT TIG TIME
○ Available only with 2 STROKE SPOT When the torch trigger is pressed the welding arc persists
for the time set in the parameter. Press the torch trigger again to resume the welding process.
○ The result of this is a very precise, not oxidized welding spot without any plastic deformation of
the sheet.
- HF ARC START
○ This parameter enables the arc strike in the TIG welding procedure by means of a high frequency
(HF) current discharge. The high frequency arc strike (HF) prevents the inclusion of impurities at
the start of the weld pass. If set to OFF, the ignition will be of a 'LIFT ARC' strip type
• HF: This type of ignition occurs by means of a high-voltage electric discharge but of low am-
perage (HF) between the electrode tip and the weld workpiece. Once the electric arc is estab-
lished the generator stops delivering the HF charge. This type of ignition in addition to being
very easy and immediate, allows the electrode life to be extended and to keep it very pure
allowing the operator to work with a very precise and stable arc.
1
2
• LIFT-ARC: This type of arc blow is derived from a short low-amperage circuit (to avoid elec-
trode damage) that the operator created between the electrode tip and the workpiece and the
consequent rise of the electrode tip that maintains the current flow by creating the so-called
electric arc. It is advisable to use LIFT-ARC priming in applications such as maintenance of
32
WELD THE WORLD
+
2T HF
HF ARC IGNITION PROCEDURE
Position the tungsten electrode on the ignition point, so that there is a dis-
tance of about 2-3 mm between the electrode and the workpiece
Press the torch button according to the mode selected. The voltaic arc ignites
without touching the weld workpiece.
Multi Power 204T
2T SPOT 2T SPOT + HF
+