Current Ramp-Up Function; Pulsed Current Welding Function - Paton StandardMIG-160 Instruction Manual

4.3 CURRENT RAMP-UP FUNCTION

The function was developed to save the life of the tungsten electrode as well as the TIG
torch itself. It eliminates the formation of the initial weld pool spatter, as well as the set
time of the smooth current rise time [t.uP]. It is possible to precisely direct the torch to the
desired welding spot, since the arc ignition point in particularly critical products is not
always at the welding spot, and even with this function the welding spot can be preheated.
The default setting is "OFF," which means off.
To change the value of any function in the current welding mode, see Section 6.1.

4.4 PULSED CURRENT WELDING FUNCTION

In the context of TIG (Tungsten Inert Gas) welding, the term "lift" refers to "Lift Start",
which is a method to initiate the arc without the need for high frequency. When we talk
about "Pulse in TIG lift", we are discussing the integration of pulsed current in TIG welding
machines that utilize the Lift Start method, and that do not have an oscillator.
Here's a simplified explanation:
Pulse welding is a modified form of TIG welding where the welding current alternates
between a high (peak) current and a low (base or background) current. This pulsation helps
in better heat control, which is especially beneficial for thin materials, preventing burn-
through while still ensuring proper penetration.
Lift Start TIG welding is a way to initiate the arc by touching the tungsten electrode to the
workpiece and then lifting it away. This method doesn't require an oscillator or high-
frequency start, making it suitable for areas where high-frequency interference might be
problematic.
In machines without an oscillator, the Lift Start is used to initiate the arc, and then the
pulsed current is used throughout the welding process. This combination offers welders the
advantage of starting the arc without high frequency while still benefiting from the heat
control and other advantages of pulse welding.
To implement this function in the device, you must first enable the current pulse mode
[Po.P], switch from the "OFF" state to the "ON" state, and also set four parameters: pulse
current [I.iP], pause current [I.PS ], pulse frequency [Fr.P] and pulse/pause ratio (or "duty
cycle") [dut].
By default, the pulse frequency [Fr.P] and duty cycle [dut] are at the most common values
of 10.0Hz and 50%, respectively. When the "duty cycle" parameter is changed from 50%, an
asymmetry is introduced between the current pulse time and the current "pause" time:
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PATON StandardMIG DC MMA/TIG/MIG/MAG