Output Connections; Arc Force - Lincoln Electric INVERTEC 160SX Operator's Manual

Output Connections

A quick disconnect system using Twist-MateTM cable
plugs is used for the welding cable connections. Refer to
the following sections for more information on
connecting the machine for operation of stick welding
(MMA) or TIG welding.

(+) Positive Quick Disconnect: Positive output
connector for the welding circuit.

(-) Negative Quick Disconnect: Negative output
connector for the welding circuit.
Stick Welding (MMA)
First determine the proper electrode polarity for the
electrode to be used. Consult the electrode data for this
information. Then connect the output cables to the
output terminals of the machine for the selected polarity.
Shown here is the connection method for DC(+) welding.
Connect the electrode cable to the (+) terminal 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.
For DC(-) welding, switch the cable connections at the
machine so that the electrode cable is connected to (-)
and the work clamp is connected to (+).
TIG Welding
This machine does not include a TIG torch necessary for
TIG welding, but one may be purchased separately.
Refer to the accessories section for more information.
Most TIG welding is done with DC(-) polarity shown
here. If DC(+) polarity is necessary switch the cable
connections at the machine.
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.
Allowable TIG processes:

Lift TIG
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Arc Force

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 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.
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
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
Machine Start-Up:
When the machine is turned ON, an auto-test is
executed; during this test all LEDs are turned ON then
OFF. After that the Power ON LED blinks until the
machine has completed the Start-Up sequence.

The Machine is ready to operate when on the Front
Control Panel lights up the Power ON LED with one
of the three LED of the Welding mode command.
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