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Connect the torch cable to
the (-) terminal of the
machine and the work
clamp to the (+) terminal.
Insert the connector with
the key lining up with the
keyway and rotate
approximately ¼ turn
clockwise. Do not over
tighten. Finally, connect
the gas hose to the gas regulator on the cylinder of gas
to be used.
VRD: Voltage Reduction Device
This machine is provided by an internal VRD (Voltage
Reduction Device) circuitry: this device reduces the
voltage at the output leads. The VRD is automatically
enabled / disabled by the machine. The factory default
voltage is:
V145-S CE:
V145-S CE (12V):
V145-S AUSTRALIA:
Refer to the section below for more details.
Auto Adaptive Arc Force (with MMA
welding)
During MMA welding is activated the function Auto
Adaptive Arc Force that increases temporary the output
current, used to clear intermittent connections between
the electrode and the weld puddle that occur during stick
welding.
This is an active control feature that guarantees the best
arrangement between the arc stability and spatter
presence. The feature "Auto Adaptive Arc Force" has
instead of a fixed or manual regulation, an automatic and
multilevel setting: its intensity depends by the output
voltage and it is calculated in real time by the
microprocessor where are also mapped the Arc Force
levels. The control measure in each instant the output
voltage, compare with the mapped levels and it
determines the amount of the peak of current to apply;
that value is enough to breaks the metal drop that is
being transferred from the electrode to the workpiece as
to guarantee the arc stability, but not too high to avoid
spatters around the welding puddle. That means:
•
Electrode / workpiece sticking prevention, also with
low current values.
•
Spatters reduction.
The welding operations are simplified and the welded
joins looks better, also if not brushed after the welding.
This feature is available in the Soft Stick and Crisp
Stick operating modes and can be selected by the
operator and it allows to weld with the characteristics
more suitable at the electrode type and welding
conditions. The Crisp Stick feature also increases the
Hot Start action, facilitating the arc striking.
With the MMA welding are also enabled the following
features:
•
Hot Start: This is a temporary increase in the initial
welding current. This helps ignite the arc quickly
and reliably.
•
Anti-Sticking: This is a function that decreases the
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75 Vdc
12 Vdc
12 Vdc
A-3
output current of the machine to a low level when
the operator makes an error and sticks the electrode
to the work piece. This decrease in current allows
the operator to remove the electrode from the
electrode holder without creating large sparks that
can damage the electrode holder.
Refer to the section below for more details.
Controls and Operational Features
A.
Output Current
Knob:
Potentiometer used
to set the output
current used during
welding, from 5A to
145A.
B.
Welding Mode
Switch: With three
positions, controls
the welding mode of
the machine: two for
Stick welding (Soft
and Crisp) and one
for Lift TIG welding.
•
Soft Stick: For a welding with a low spatter
presence.
•
Crisp Stick: For an aggressive welding, with an
increased Arc stability.
•
Lift TIG: When the mode switch is in the Lift
TIG position, the stick welding functions are
disabled and the machine is ready for Lift TIG
welding. Lift TIG is a method of starting a TIG
weld by first pressing the TIG torch electrode
on the work piece in order to create a low
current short circuit. Then, the electrode is
lifted from the work piece to start the TIG arc.
C. Thermal LED: This indicator will turn on when the
machine is overheated and the output has been
disabled. This normally occurs when the duty cycle
of the machine has been exceeded. Leave the
machine on to allow the internal components to
cool. When the indicator turns off, normal operation
is again possible.
D. Power On/Off & VRD (Voltage Reduction Device)
LEDs: These LEDs (one green and one red)
operates as described in the table below:
LED status
Green
Red
ON
OFF
The machine is turned ON.
VRD ON condition: The machine
is at idle (no-welding time) and
the VRD device is enabled. No
current at the output leads; the
voltage has reached a value
under the VRD limit.
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