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PATON
®
ADI 200 STANDARD TIG/MMA MIG/MAG
3.9 WELDING AT PULSE WELDING CURRENT
This function is designed to simplify the control of a welding process in various spatial welding
positions, excluding a flat welding position. This function is also used in welding nonferrous
metals. When this function is activated, the application of pulse welding current improves the
mixing of molten metals in the weld area and causes forced action on the transfer of molten metal
drops into the welding pool, therefore the stability of the weld formation and the stability of the
welding process are improved. The pulse welding current in the manual arc welding process affects
the weld parameters similar to the movement of the operator hand in manual arc welding process,
specifically at hard-to-reach places. The proper adjustment of the welding process parameters in
the welding at pulse welding current has a direct effect on the weld quality, specifically reduces
weld metal porosity and decreases the graininess of the weld metal. As a result of the improved
weld quality, the weld strength increases.
To activate this function, it is necessary to set the following three operational parameters of the
welding process: current pulse amplitude
[POWER OF PULSE]
, current pulse frequency
[FREQUENCY OF PULSE]
, and duty cycle
[DUTY CYCLE OF PULSE]
. By default, the current pulse
amplitude is 0
[OFF],
that is, the function is switched off, the current pulse frequency is 50 Hz, and
the duty cycle is 50 %. To activate the function, set the current pulse amplitude
[POWER OF PULSE]
higher than 0. The current pulse amplitude should be set in percentage of the welding current
specified for the welding process.
Example:
Welding is to be performed with electrode wire 3.0 mm in diameter. The set welding
current is 90 A. The current pulse amplitude is
[
POWER OF PULSE
] =
40 %. The
current pulse frequency is
[
FREQUENCY OF PULSE
]
50 Hz (default value). The duty
cycle is
[
DUTY CYCLE OF PULSE
]
50 % (default value)
Result:
The result is the following: the welding current pulse amplitude will be in the range of
54 … 126 A, the current pulse frequency will be 50 Hz, and the current pulse length
will be equal to the length of an interval between pulses. If the duty cycle
[
DUTY
CYCLE OF PULSE
]
is not equal to 50 %, the current pulses will be nonsymmetrical
relative to the intervals between pulses, but the average welding current value will be
equal to the set welding current value of 90 A. As a result, the average heat input to
the weld will not change.
Default
[DUTY CYCLE OF PULSE]
50%
[DUTY CYCLE OF PULSE]
20%
[DUTY CYCLE OF PULSE]
70%
Operations required to set these parameters for the current welding process are described in
Section 6.1.
t, s
t, s
t, s
