Würth WIG 180 DC Traducción Del Manual De Instrucciones De Servicio Original página 24

Electrode welding with a positive (+)
electrode:
▸
Connect the electrode holder to the positive (+)
socket [4] of the machine and secure it by turning
the connector clockwise.
Electrode welding with a negative (–)
electrode:
▸
Connect the electrode holder to the negative (–)
socket [3] of the machine and secure it by turning
the connector clockwise.
▸
Press the lever on the handle of the electrode
holder. Clamp an electrode with the bare end in
the holder, observing the notches on the inside of
the two jaws.
Connecting the workpiece lead
▸
Connect the workpiece lead to the free second
socket [3] or [4]. Secure the connecting plug by
turning in clockwise direction.
Switch on the machine
Switch on the machine at the main switch [5] and
select with button [18/2] the "Electrode" welding
method (LED [13] Electrode lights up).
A power range from 5 A to 150 A is available for
electrode welding. Set the welding current at rotary
controller [11].
Striking an arc ("Lift Arc")
▸
Touch the workpiece briefly with the electrode at
the point to be welded and lift the arc slightly: The
arc burns between workpiece and electrode.
Pulse
▸
Press the button [18/1] until the Pulse LED [12]
illuminates.
▸
Call up the ancillary parameters (see "Call ancil-
lary parameters").
▸
Select the ancillary parameter secondary current
I (code I2).
2
▸
Set the desired secondary current value with the
rotary controller [11]. The set value indicates the
proportion in % of the welding current I
▸
Select the ancillary parameter Pulse frequency
(code FPU).
▸
Set the desired pulse frequency with the rotary
controller [11].
▸
Select the ancillary parameter Pulse duty cycle
(code FPU).
24
▸
Set the desired pulse duty cycle with the rotary
controller [11]. The set value indicates the propor-
tion in % of the welding current I
Example: 60 % corresponds to the proportion
60 % of welding current I
current I
▸
Exit ancillary parameters.
Hot start
During "Electrode" welding, a higher current can
be set to strike the arc, irrespective of the welding
current (see Setting of ancillary parameters).
Arc force
In order to improve the welding behaviour, the
system has an arc force function: With short arcs
or during brief short-circuits, the welding current is
higher than the set value.
Anti-stick
If a short-circuit of the electrode with the workpiece
lasts longer than the normal striking time (e.g. if the
electrode "sticks"), the welding current is reduced to
less than 20 A.
This prevents overheating of the electrode and the
short-circuit can be remedied without striking an arc.
If the system does not detect the short-circuit, the anti-
stick device is not tripped. This can be the case with
— Very thin electrodes where the welding current is
set too high,
— Long and excessively thin welding cables,
— Poor ground contact.
Insert the electrode
▸
Grind the end of the tungsten electrode [28] so
that it forms a point
▸
Unscrew the clamping cap [29]
▸
Push the tungsten electrode [28] through the
appropriate clamping sleeve [27] and secure
▸
Screw on the clamping cap [29] again.
.
1
Do not remove the clamping sleeve hous-
ing [23] or gas nozzle [24].
Functions of welding torch buttons
Torch button 1 [30]: Start/Stop
Starting and stopping the welding process
Torch button 2 [31]: Secondary current
During the welding process, a secondary current can
be called up by pressing the welding torch button
(standard setting: 50% of main current).
and 40 % secondary
1
.
2
TIG welding (Fig. IV)
.
1