Paton StandardMIG -200, Data Sheet And Operating Manual

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PATON StandardMIG MMA/TIG/MIG/MAG
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4.3 ARC CURRENT FADE‐IN FUNCTION
Except for saving the operating life of the electrode and, to some extent, of
the torch itself, this function is also required for convenient use of the torch. It
eliminates initial splashing of the weld pool. In addition, one can guide the torch
exactly to the required welding place during the set time of current fade‐in [t.uP],
since the place of arc striking on critical‐duty work pieces is not always coincident
with the place of welding. Place of welding can also be preliminarily heated. By
default, the time is set to 1.0s. See Clause 6.1 for sequence of changing the value of
any function in the current welding mode
4.4 PULSED CURRENT WELDING FUNCTION
This function is designed to facilitate control over the welding process in spatial
positions other than downhand position, as well as during welding of non‐ferrous
metals. This function affects directly weld metal dilution and, consequently, on the
stability of weld forming. It substitutes movements of welder’s hand to some extent,
which is especially important in hard‐to‐reach places. It also somewhat forces drop
transfer from the filler wire into the weld pool. 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 10.0Hz 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 non‐consumable tungsten electrode of 2 mm in diameter,
set the base value of arc current is 100 A, and pulsing power [Po.P] = 30%, while pulsing
frequency [Fr.P] = 10.0Hz and duty ratio [dut] = 50% by default.
Result: current will pulse in the range from 70A to 130A with a frequency of 10Hz;
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%
t, s
t, s t, s