- 8 -
risks to persons (e.g. electric shock) and objects (e.g. re).
5.4 CONNECTION OF THE WELDING CABLES
WARNING! BEFORE MAKING THE FOLLOWING CONNECTIONS MAKE
SURE THE WELDING MACHINE IS SWITCHED OFF AND DISCONNECTED FROM
THE POWER SUPPLY OUTLET.
Table (TAB. 1) gives the recommended values for the welding cables (in mm2)
5.4.1 TIG welding
Connecting the torch
pipe to the appropriate connector.
Connecting the welding current return cable
- This is connected to the piece to be welded or to the metal bench on which it rests,
as close as possible to the joint being made.
designed for AC welding).
Connecting the gas bottle
clamp supplied.
- Loosen the ringnut for adjusting the pressure reducing valve before opening the
valve on the bottle.
suggestions for use given in the table (TAB. 4)
WARNING! Always close the gas bottle valve at the end of the job.
5.4.2 MMA WELDING
Connecting the electrode-holder clamp welding cable
electrode.
Connecting the welding current return cable
This is connected to the piece being welded or to the metal bench supporting it, as
close as possible to the join being made.
Warnings:
- The welding cables should be as short as possible.
welding.
6. WELDING: DESCRIPTION OF THE PROCEDURE
6.1 TIG WELDING
transmitting the welding current to it and protecting the electrode itself and the weld
(FIG. G).
with the exact current, see the table (TAB. 3).
8mm for corner welding.
pieces (up to about 1mm) weld material is not needed (FIG. H).
(FIG. I). To
grease, solvents etc.
6.1.1 HF and LIFT strike
HF strike:
mode does not entail either tungsten inclusions in the weld pool or electrode wear and
the weld pool on the piece and proceed along the joint.
and the HF discharges are visible, do not insist for long in subjecting the electrode to
slope down setting.
LIFT strike:
tungsten inclusions and electrode wear to a minimum.
, after a few moments the
6.1.2 TIG DC welding
as shown in FIG. L,
are possible.
6.1.3 TIG AC welding
arc, a narrower weld pool and limited heating of the electrode. Lower values give a
The table (TAB. 4) summarises the effects of parameter changes in AC welding.
The instructions for this welding procedure are also valid.
The table (TAB. 3)
suitable electrode is a pure tungsten electrode (green band).
6.1.4 Procedure
-
during welding to the actual required heat transfer.
-
enough to allow the electrode and weld pool to cool at the end of welding without
coming into contact with the atmosphere (oxidation and contamination).
TIG mode with 2T sequence:
.
current value.
-
TIG mode with 4T sequence:
- .
current
and the postgas phase will start.
TIG mode with 4T and BI-LEVEL sequence:
- .
pressure and release should be short) the current will change between the setting
12.
. The
current will be maintained until the button is released to terminate the welding
FIG. M).
TIG SPOT mode:
time has been reached (spot time).
6.2 MMA WELDING
and the most suitable current.
- The welding current must be regulated according to the diameter of the electrode in
ØElectrode (mm) Welding current (A)
Min. Max.
1.6 25
2
2.5
3.2
4
5
6
- The user must consider that, according to the electrode diameter, higher current
behaviour) of the welding machine. The setting for this parameter can be made
either on the panel or using the remote control with 2 potentiometers.
6.2.1 Procedure
