Welding Mode; Mma Welded With Coated Electrode - Platec INVERTER 250W Manual De Instrucciones

Release (4T) the button to cut off the arc.
The supply of gas continues for a period equal to the
POST-GAS time (adjustable).
2
T
Bring the torch near to the piece to be welded, keeping
the point of the electrode 2 or 3 mm away from the piece
itself.
Press (1T) and keep the button for the torch held down.
The arc strikes without contact with the piece, and the
voltage discharges (HF) automatically stop.
The WELDING CURRENT goes to the value set, carrying
out an ASCENT RAMP if necessary (adjustable time)
Release (2T) the button to start the process of
completing the weld.
The current goes to the FINAL CURRENT value set in a
period equal to the chosen DESCENT RAMP time
(adjustable).
The electric arc goes out.
The supply of gas continues for a period equal to the
POST-GAS time (adjustable).
4 H W
T F ELDING
Bring the torch near to the piece to be welded, keeping
the point of the electrode 2 or 3 mm away from the piece
itself.
Press (1T) and keep the button for the torch held down.
The arc strikes without contact with the piece, and the
voltage discharges (HF) automatically stop. The welding
current goes to a value of 8A, which acts as the PILOT
CURRENT (pilot current = A.on).
Release (2T) the torch button.
The WELDING CURRENT goes to the value set, carrying
out an ASCENT RAMP if necessary (adjustable time).
Press (3T) and keep the button held down to start the
process of completing the weld.
The current goes to the FINAL CURRENT value set in a
period equal to the chosen DESCENT RAMP time
(adjustable).
The electric arc stays lit, and the supplied current is equal
to the FINAL CURRENT (adjustable).
Under these conditions, it is possible to carry out the
closing of the weld bath (CRATER FILLER CURRENT).
Release (4T) the button to cut off the arc.
The supply of gas continues for a period equal to the
POST-GAS time (adjustable).
B -L W
I EVEL ELDING
Bring the torch near to the piece to be welded, keeping
the point of the electrode 2 or 3 mm away from the piece
itself.
Press (1T) and keep the button for the torch held down.
The arc strikes without contact with the piece, and the
voltage discharges (HF) automatically stop. The welding
current goes to a value of 8A, which acts as the PILOT
CURRENT (pilot current = A.on).
Release (2T) the torch button.
The WELDING CURRENT goes to the value set, carrying
out an ASCENT RAMP if necessary (adjustable time).
Press and immediately release the torch button to go on
to the SECOND WELDING CURRENT.
E n
E n
H W
F ELDING
W P C
ITH ILOT URRENT
W P C
ITH ILOT URRENT
g l i s h
g l i s h
I N V E R T E R 2
I N V E R T E R 2
The button should not be kept pressed for more than 0.3
seconds, otherwise the phase will start for the completion
of the weld.
By pressing and immediately releasing this button, you
can return to the WELDING CURRENT.
Press (3T) and keep the button held down to start the
process of completing the weld.
The current goes to the FINAL CURRENT value set in a
period equal to the chosen DESCENT RAMP time
(adjustable).
The electric arc stays lit, and the supplied current is equal
to the FINAL CURRENT (adjustable).
Under these conditions, it is possible to carry out the
closing of the weld bath (CRATER FILLER CURRENT).
Release (4T) the button to cut off the arc.
The supply of gas continues for a period equal to the
POST-GAS time (adjustable).
• S4: Welding mode selection key. Each time the key
is pressed it is possible to move from one welding mode
to another only when they are not in the process of
welding.
If the led next to the symbol is on, the selection is
confirmed.
The welding modes which can be selected are:
• M
MA
• C
ONTINUOUS
• P T
ULSED IG
• S
The pulsation frequency, the peak time and the base
currant are set by the manufacturer on a synergic curve
related to the welding current; in this modality the above-
mentioned parameters can be displayed by pressing the
S2 key but they cannot be modified.

WELDING MODE

MMA WELDED WITH COATED ELECTRODE

Connect the electrode holder and the earth clamp to the
output sockets of the machine according to the polarity
required by the manufacture of the electrode that you
wish to use.
CAUTION! Make sure that the electrode does not touch
any metal part at all, since in this welding mode, the
output sockets of the machine are live.
M W
MA ELDED
To obtain good welds, it is necessary to weld on clean
metal pieces, which are free of rust or other contaminating
agents. In preparing the edges to be welded, take into
account the thickness, type of joint, position of weld and
the requirements of the project.
Normally the edges are prepared in a "V" shape; but with
thicker items, it is recommended to have "X" shaped
edges (backweld) or "U" shaped edges (no backweld).
The manufacturers of the electrodes specify the optimum
welding current for each type of electrode. The type of
electrode to be used depends on the thickness of the
material to be welded and on its position.
1 8
1 8
5 0 W
5 0 W
T
IG
P
YNERGIC ULSED
I
NSTALLATION
W C E
ITH OATED LECTRODE
T .
IG