Paton MultiPRO Series, Техническое описание и руководство по эксплуатации, Страница: 15 / 44

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PATON MultiPRO series DC MMA/TIG/MIG/MAG
forming and of the welding process. In other words, this process substitutes
movements of welder’s hand to some extent, which is especially important in
hard‐to‐reach places. The correct setting determines weld shape and quality of the
weld forming, thus reducing risk of porosity and grain structure of the weld and
consequently increasing weld strength.
In order to implement this function, three parameters must be set in the
machine: pulsing power [Po.P], pulsing frequency [Fr.P] and mark‐to‐space ratio
(or duty ratio) [dut]. By default, pulsing power [Po.P], which is the key parameter,
is set to “OFF” position, i.e. disabled, while pulsing frequency [Fr.P] and duty ratio
[dut] are set to the most common values of 50Hz and 50% respectively. In order to
enable this function, it is enough to set pulsing power [Po.P] to a value above zero.
This parameter is set in percent of the current set value of base arc welding.
Example: welding with a Ø3mm electrode, set the base value of arc current is
60 A, and pulsing power [Po.P] = 40%, while pulsing frequency [Fr.P] = 5.0Hz and
duty ratio [dut] = 50% by default.
Result: current will pulse in the range from 36A to 84A with a frequency of 5Hz;
pulses will be of the same shape in terms of both magnitude and time.
If duty ratio parameter [dut] is changed to a value other than 50%, pulses
become asymmetric—between the current pulse time and the current “pause”
time:
by default
“duty ratio” [dut] = 50% “duty ratio” [dut] = 20% “duty ratio” [dut] = 70%
The machine calculates pulsing in such a way that, at a constant set differential
of pulses, average level of welding current is maintained at the level of set base
welding current value of 60A (i.e. equal to the set value), in order to keep the
resulting average heat input into the weld at a constant level of 60A, but the
stability of the welding process and the mixing of the weld pool will change. This is
necessary in the situation, when a user has reduced base current and provided
maintenance of stable welding process using pulses—thus, decrease of heat input
can also be clearly determined by comparison with initial base current.
These parameters are set differently in different situations in accordance with
welding operator’s requirements. See Clause 6.1 for sequence of changing the
value of any function in the current welding mode.
t, s
t, s t, s