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PATON
StandardMIG
DC MMA/TIG/MIG/MAG
5.2 WELDING PROCESS CYCLE - MIG/MAG - 4T
To change the value of any function, see cl. 6.1.
5.2.1 BUTTON FUNCTION ON THE TORCH -
4T and alt. 4Т
a) World standard button mode
–
4Т
b) Alternative button mode
–
alt. 4Т
It is used when welding long welds. The function is as follows: when you
first press
the button on the torch, the control signal goes to the control unit. The function of pre-
purging the welding area with gas (gas valve opens) is activated. After
the first release
of
the button, the signal to turn on the source and the wire feeder motor is sent. From that
moment, the welding process starts, at the same time the function of gradual entering the
welding mode for the time [t.uP], as well as additional functions can be executed (for
example, pulse mode, which we will consider in detail in the following paragraphs). All this
is done according to the welding process cycle given in the cyclogram of paragraph 5.2.
After
the second pressing
of the button on the torch, the function of gradual decay of
voltage and wire feeding speed for the time [t.dn] is executed, then the source is turned off.
After
the second release
of the button, the post-purging function of the welding zone is
activated for the time [t.Po] (the gas valve closes with a delay).
In the alternative button mode alt.4T, it skips the second cycle (the first button
release). This differs from the world standard 4T. To explain, the system does not wait for
the first release
of the button on the torch, but immediately after the pre-purging function
of the welding zone with gas in time [t.Pr], it starts the arc ignition process. It is similar to
the 2T button mode. The welding process continues unchanged after
the first release
. This
