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1.
Select the desired welding mode. Press the Mode Key (4) till led corresponding to the desired wel-
ding mode lights on:
•
2T – 2 stroke welding mode (manual)
ger and stops by releasing the same trigger. Pre-gas Time and post-gas time are fixed.
•
4T – 4 stroke welding mode (automatic).
trigger after a pre-gas time, it continues even if trigger is released and stops when this is pressed
and released once again after a post-gas time. Pre-gas time is fixed and post-gas time lasts the
time the torch trigger is kept pressed before final release.
•
Manual Spot Welding
ding time by rotating the Regulation knob (6).
•
Automatic Spot Welding
time by rotating the regulation knob (6).
2.
If needed, adjust the BBT, Slope and Post Gas values. Press the Selection Key (5) to view on the
digital ammeter the wording corresponding to the parameter you want to adjust. To adjust value
turn the regulation potentiometer clockwise or counterclockwise. The voltmeter will view: 0÷99
for BBT and Slope and 00.0÷03.0 for Post Gas. To keep on memory the adjusted value press the
Mode Key (4). Note: generator is equipped with a timer to close the Regulation menù after 30s.
3.
Set wire feed speed using the wire speed control knob (7).
4.
Set welding voltage using the welding voltage selector switches (2 - 3).
5.
Place the torch over the seam to be welded holding it at approximately a 45° angle, with the
nozzle at 5 mm distance from the piece to be welded. Lower the shielding helmet and press the
welding torch trigger to initiate an arc. As the arc has struck, move the torch from a left to right
direction, slowly along the seam at a constant speed. Turning the wire speed control knob clockwi-
se, will result in increased wire feed speed and welding current. Welding voltage must be adjusted
to match the wire feed speed (welding current).
6.
Progressively select higher voltage positions, while increasing the wire speed.
7.
During welding the dispaly views the real value of welding current and voltage.
Increase of the welding voltage, at the same wire speed, leads to a longer arc (without substantially affecting
the current). Conversely, a decreased welding voltage results in a shorter arc (the current again is not su-
bstancially changed).
A change in wire diameter results in changed parameters. A smaller diameter wire requires an increase
in wire feed speed to reach the same current. But be careful: If certain limits are exceeded, a satisfactory
weld cannot be obtained:
•
A) A too high wire feed speed (too high with regard to the welding voltage) results in pulsing within
the torch. This is because the wire dips into the puddle and cannot be melted off fast enough. This
will cause excessive spatter,
•
B) A too high welding voltage (too high with regard to the wire feed speed), will result in excessive
and unstable arc. By increasing still further the voltage, the contact tip will burn.
•
C) In any case, an excessive wire speed can be corrected through the arc voltage increase. The
limit of this operation depends on the thickness of the material to weld (a certain limit exceeded
will result in the perforation).Using the wire speed control knob, adjust for a "crisp" sounding arc:
experience will help to recognize the right "sound" of the arc.
24
-ENGLISH-
OPERATIOn
. The welding process starts by pressing the torch trig-
– the led (10) over the regulation knob (6) stays on. Adjust the spot wel-
- the led (10) over the regulation knob blinks. Adjust the Pause / Work
The welding process starts by pressing the torch
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