Tig Welding - CEA DIGITECH 400 PULSED-TA4 Manual De Instrucciones

TIG welding

Connect up as shown in fig. C to start welding in TIG, more specifi-
cally (with machine switched off):
• Connect up the gas tube, coming from its rapid coupling on the
torch with TIG welding valve, to the gas cylinder and open it.
Gas cylinders are supplied with a pressure reducer to adjust
pressure of the gas used for welding.
• connect up the earthing system cable to the rapid coupling marked
by a + (positive) symbol and then the relevant earth clamps to
the piece being welded or to its holder in an area free from rust,
paint and grease;
• connect up the torch power cable to the rapid coupling marked
with a - (negative) symbol.
Part to be welded
The part to be welded must always be connected to earth in order
to reduce electromagnetic emission. Much attention must be af-
forded so that the earth connection of the part to be welded does
not increase the risk of accident to the user or the risk of damage
to other electric equipment. When it is necessary to connect the
part to be welded to earth, you should make a direct connection
between the part and the earth shaft. In those countries in which
such a connection is not allowed, connect the part to be welded to
earth using suitable capacitors, in compliance with the national regu-
lations.
26
2000H799
FIG. C