14 | P a g e
PATON
®
PSI PRO 315 A 400 V DC MIG/MAG TIG/MMA
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 40%. The current pulse frequency is 50
Hz (default value). The duty cycle is 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 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%
If it is required to reduce heat input to the weld, as in welding thin parts, the welding current should be
decreased by performing the standard setting operations. In this case, current pulse parameters will be
adjusted automatically according to the set welding current, and the operator can control the reduction
of the heat input, as compared with the heat input at the initial welding current, by simultaneously
varying the current pulse amplitude and duty cycle.
The aforementioned parameters should be set differently for different welding processes, depending on
the requirements of the operator.
Operations required to set these parameters for the current welding process are described in Section 6.1.
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