System Presentation; Generalities; Front Control Panel; Rear Panel - Selco UNISTEP Serie Instrucciones De Uso

3 SYSTEM PRESENTATION

3.1 Generalities

The semiautomatic UNISTEP Series systems for continuous wire
welding in MIG/MAG ensure high performance and quality in
welding with solid and core wires.
The static characteristic of the power source is constant voltage
with step adjustment of the welding voltage; the different
inductance outputs that can be selected enable the operator to
set optimal power source dynamics for welding.
The power source can be connected to 2 different wire feed units:
STANDARD version (WF 115):
the wire feed speed can be adjusted directly from the front
panel via potentiometer.
XP version (WF 115 XP):
these welding power sources feature an innovative "SYNERGY"
operating mode.
Synergy enable with setting of the type of material to be welded
and diameter of the wire used permits automatic wire speed
definition, simplifying system welding adjustment operations.

3.2 Front control panel

Switch I1: switch for sparking and the adjustment of the main
fields at 2/3 positions. When not set in 0, the switch connects
power to the equipment (pos. 0 = power source OFF).
Switch l2: switch for fine adjustment to 10 positions.
For both switches, the output voltage increases as the
number of the position increases.
Never operate the switch while you are welding!
L1: comes on as soon as the power source is powered.
L2: indicates cut-in of any protection devices such as
the thermal protection.
L3: comes on when voltage is present at the welder out-
put.
18
Fig.3

3.3 Rear panel

1: power supply cable
2:6x32 1A 250V fuse
3: plate specifications
4: signal cable input
5: power cable input

3.4 Sockets panel

L1, L2, L3 variable inductance output sockets.
A higher inductance provides a "softer" arc with fewer
splashes whereas a lower inductance results in a more
reactive arc.
Normally, use L1 together with step 1 on the main
switch, L2 on step 2 and L3 on step 3.
Fig.4
Fig.5