Kemppi Pulse TCS User Manual

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4.2

HOW DOES IT WORK?

In tandem welding, there is a leading arc that controls the weld penetration, while the trailing

arc affects the weld bead appearance. Both filler wires contribute to the common weld pool,

but they are independently controlled by their respective power sources. It is also possible to

use the tandem equipment to perform 1-wire welding.

4.3

THE FOUR OPERATION MODES

There are four different operation mode combinations available in KempArc Pulse TCS

system.
Pulsed + Pulsed

Both leading and trailing arcs operate in a pulsed mode, controlled by the Kemppi Tandem

Control System so that the peak of each pulse occurs in the background of the other arc. This

is the most commonly used operation mode.

Pulsed + Standard

The leading arc operates in pulsed mode, while trailing arc is constant voltage. This helps to

achieve maximum welding speed and gap bridging.

Standard + Pulsed

The leading arc is in constant voltage mode to maximize the penetration and travel speed,

while the trailing arc is in pulse mode to reduce heat input and to cool the weld pool. This

mode provides the deepest penetration.

Standard + Standard

Both leading and trailing arcs operate in constant voltage mode. This mode is mainly used

in 1-wire welding, where the active wire is switched when welding direction changes. This

reduces the cycle time.

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