Parameters; Starting Up; Shutting Down - Metabo WIG 170 AC/DC Manual De Uso

ENGLISH
S-Test
The machine checks the integrated
safety device for working
increased electrical hazards. To start the
test:
1. Turn machine ON
Both equipment-on indicator light
and the S-Test LED must be illumi-
nated.
2. Set current type selector to position
"Test".
− The machine internally simulates
a fault at the welding current out-
put. The S-Test LED must extin-
guish after a short time.
− The test was succesfull if the S-
Test LED extinguishes.
The machine is now no longer
ready to operate!
3. Turn the machine OFF.
4. Set the welding current selector
back to the desired type of current
and, after approx. 10 seceonds, turn
ON again.
3
Note:
A successfully completed test
means that no fault was detected in the
safety device.
If the test is not successfully completed it
means that the machine's control has
detected a fault in the safety device.
If that is the case, stop using the
machine and contact your Elektra
service!
5.2

Parameters

The following parameters are adjustable:
Welding current I1
Maximum current for the actual welding
process.
Setting range, in 1 A increments,
− for TIG welding: 3 A...170 A
− for stick
electrode
10 A...140 A.
3
Note:
During the welding process the
current nominal welding current value is
displayed.
If a slopedown time greater than zero is
set, the displayed value changes contin-
uously until the final value is reached.
The welding current can be changed
anytime during the welding process.
3
Note:
If a foot-operated remote control
unit is connected, the machine will
always switch into 2-step mode.
When a hand-operated remote control
unit is connected, the working current
can only changed by this control.
Current setting range foot-operated
remote control unit: minimum current to
12
All manuals and user guides at all-guides.com
set working current.
Current setting range hand-operated
remote control unit: minimum current to
under
maximum current.
Secondary current I2
A current that can be switched to in 4-
step mode during the welding process.
To display the currently set value:
1. Select one of the 4-step modes.
2. Press and hold the secondary cur-
rent button of the TIG torch.
− The welding current LED I2 is illu-
minated and the currently set
value of I2 is shown in the dis-
play. The value can now be
changed with the secondary cur-
rent control.
3. Release the secondary current but-
ton.
− The I2 welding current LED extin-
guishes, the value of the welding
current I1 is on display again.
− The value set for I2 is stored.
Minimum current
Current level to which the welding cur-
rent slopes down for crater filling at the
end of the welding process.
Slopedown time
Period in which the current slopes down
to minimum current.
Setting range: Min....Max., correspond-
ing to 5 ms...10 sec.
Gas postflow time t.
Duration of shielding gas postflow after
the welding process has ended.
Setting range 5...35 sec.
FREQUENCY
Pulse frequency
With the
frequency [Hz] = duration [sec] the dura-
tion of the pulse can be calculated.
welding:
Setting range: 30 Hz...200 Hz.
BALANCE
(WIG AC..mode only)
Ratio of positive to negative voltage time
for AC welding. A value of for instance
30 % means that for 30 % of the dura-
tion (t ) of a period (T) the welding volt-
1
age at the electrode will be positive and
for the remaining 70 % (t
ative.
Increasing this value leads to a better
cleaning effect (aluminium welding), but
at the same time subjects the electrode
to a higher thermal stress.
Setting range:
5.3
Gas-shielded arc welding
work:
− Correct shielding gas connected?
− Correct gas shroud fitted?
− Electrode tip still pointed?
in lengthwise direction only.
1.
2.
3.
formula 1 ÷ set
4.
5.
Stick electrode welding
1.
2.
3.
4.
) it will be neg-
2
5.4
1.
2.
3.
4.
+U
t t
1 2
T
-U
25 % ... 75 %.

Starting up

A
Caution!
Check before starting
Regrind if necessary.
3
Note:
Grind electrodes for DC welding
Attach welding return cable at a suit-
able location to the workpiece.
Open cylinder valve and set desired
gas flow rate.
Change gas shroud, if necessary.
Turn main switch ON.
Select desired welding process.
Set desired welding current.
The welding machine is now opera-
tional.
Attach welding return cable at a suit-
able location to the workpiece.
Turn main switch ON.
Select welding process "Electrode".
Set desired welding current.
The welding machine is now opera-
tional.

Shutting down

Close gas cylinder valve.
Set master switch to "0".
Disconnect welding return cable
from workpiece.
Unplug power cable.
t
any