-23 -
PATON
StandardMIG
MMA/TIG/MIG/MAG
It is used in welding of long length welds. The function is as follows: when first
pressing the button on the torch, the control signal enters the control unit, the
function of pre-purging the welding zone with gas (the gas valve is opened) is
processed, then, after the first release of the button, a signal is given to turn on the
source and the wire feed motor. From now on, the welding process begins; at the
same time, the function of smoothly entering the welding mode during the [t.uP]
time is worked out, as well as additional functions can be worked out (for example,
a pulsed mode, which we will discuss in detail in the following paragraphs)—all this
is shown on the cyclogram in Clause 5.2, according to the cycle of the welding
process. After the second press of the torch button, the function of arc voltage
fade‐out and wire-feeding speed during the [t.dn] time is tested, and then the
source turns off. After the second release of the button, the function of the
post‐purging of the welding zone with shielding gas during the [t.Po] time is
worked out (the gas valve is closed with a delay).
In the alternative mode, unlike the 4T global standard, the system does not
wait for the first release of the torch button, and immediately after testing the
function of pre-purging the welding zone with gas during the [t.Pr] time, the
process of arc striking starts—this is similar to that in the 2T button mode. This
mode is provided by the PATON Company as a bonus; it can be used only at will,
since it is more familiar from the point of view of more frequent use of 2T mode by
customers in classical semiautomatic machines, and therefore, it is more intuitive.
5.3 FUNCTION OF PRE‐PURGING WITH SHIELDING GAS
This function is necessary to protect the weld zone from the harmful effects of
atmospheric air and consists in pre-purging the weld zone with shielding gas
before the arc striking. By default, the pre-purging time [t.Pr] is set to 0.5 seconds;
this value can be changed at any time at your discretion. See Clause 6.1 for
sequence of changing the value of any function in the current welding mode. Use
the right indicator of the wire-feeding machine.
5.4
WIRE‐FEEDING SPEED FADE‐IN FUNCTION
This function is necessary for a smooth transition to the welding mode for a
set time [t.uP], which reduces spilling of the weld pool and splashing at the time of
arc striking, when the wire is still cold. The increased time of a smooth transition is
applied to the initial formation of the pool.
ATTENTION!
The longer the rise time, the lower the initial penetration, so it is
used only for medium and long length welds. For this reason, do not increase the
time more than 0.1 seconds when welding with tick welds, etc.
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