Selco RC10 Instrucciones De Uso página 21

4.0 FUNCTION KEYS
Function key which is always active.
Selects the type of welding required.
The process chosen is shown by the graphic symbol
shown on the display corresponding to the function key.
Within a welding selection, the F1 button allows you to
choose between a graphic display (with current and voltage rea-
dings in TIG and electrode, and wire speed, thickness, current
and voltage readings in MIG) and display of all the parameters
that can be set (according to the type of welding being used).
Function key active only in the TIG and MIG/MAG pro-
cess. Allows you to choose between sets of different wel-
ding modes within a process (TIG-MIG) which can be
controlled via the torch button.
2-stroke or 4-stroke welding in TIG: with Two-stroke, pressing
the button makes the gas flow and activates the voltage on the
electrode with the relevant current flow (possible increase to the
current value set); on releasing the button the current goes to
zero by slow decrease, once the arc is off, the gas continues to
flow for the whole post-gas time set from the keyboard.
With Four-stroke, the first push on the button makes the gas flow,
carrying out a manual pre-gas treatment, on releasing it the vol-
tage reaches the torch, striking the arc and the current value
increases to the value set. The next push on the button makes
the final process start (descent ramp) until zero current, on relea-
sing the button definitively, the post-gas time starts as set from
the keyboard.
2-stroke or 4-stroke MIG/MAG welding (Fig. 1): on Two-stro-
ke, pressing the button makes the gas flow, activates the voltage
on the wire and makes it advance; on releasing it, the current
goes to zero, the wire is stopped, and the gas continues for the
post-gas time.
Fig. 1 Diagram of the 2 and 4 stroke work cycle
With four-stroke, the first push on the button makes the gas flow,
carrying out a manual pre-gas treatment, releasing it activates the
current to the wire and its advance. The next push on the button
stops the wire and makes the final process start wnich takes the
current to zero immediately after the burn back time; on relea-
sing it definitively, the gas flow is stopped.
Timer welding in TIG and MIG/MAG (Fig. 2): pressing the but-
ton makes the gas flow and activates the voltage to the electro-
de; the current automatically goes to zero after the welding time
set from the keyboard. To restart, release and press the torch but-
ton again.
Fig. 2 Diagram of the timer work cycle
Welding in TIG BILEVEL 2T and TIG BILEVEL 4T: the Bilevel is
an option that provides two current levels, I1 and I2, which can
be directly controlled via the torch button.
The advantage of Bilevel is therefore the possibility of performing
pulse welding fully controlled by the torch button.
There are two types of Bilevel: Bilevel 2T and Bilevel 4T.
The Bilevel mode is selected by repeatedly pressing key F2 until
the required setting is reached.
Once the Bilevel mode has been selected, a new item I2 will be
shown on the display in which the required current value can be
entered.
BILEVEL 2T
When the torch button is pressed, the gas begins to flow and the
electrode is powered. The arc is sparked at the initial current,
performs the ascent ramp (if present) and settles at current I1.
When the torch button is released and then immediately pressed
again, the current will switch from I1 to I2.
If the torch button is released for a relatively long time, the cur-
rent will drop to the final value following the set descent ramp
and the arc will then be cut off.
The gas will flow for the whole of the set post gas time.
BILEVEL 4T
When the torch button is pressed, the gas begins to flow, the
electrode is powered and the arc is sparked at the initial current.
When the torch button is released, the current increases to I1,
performing the pre-set ascent ramp. When the button is pressed
again and then immediately released, the current switches from
I1 to I2.
If the torch button is pressed for a relatively long time, the wel-
ding current will drop to the final value following the set descent
ramp.
Release of the button will cut the arc off.
The gas will flow for the whole of the set post gas time.
* In practice, with this system, the operator can perform wel-
ding by controlling four different currents:
I initial/ I final/ I weld / I weld 2
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