Functional description
25
Manual pulsing:
If torch button 1 is pressed during the downslope time with the TIG 2-step
function, the welding current immediately jumps to the value used during welding.
Depending on the point in time during the downslope time the torch button is
pressed, the energy mid-point can be selected directly and is infinitely variable.
t
t
t
Fig. 10: Manual pulsing procedure
3.6.9
End crater current
The end crater current is set as described in Chapter 3.6.1.
The end crater current is the welding current to which the system is reduced at
the end of the welding procedure. The setting can be made between 10% and
100% of the selected current I1 (infinitely variable). Example: End crater current
40% and welding current I1 100 A -> end crater current 40A). The percentage
ratio can be set to a fixed value in the System application. Selecting a suitable
end crater current makes the following possible:
Prevents notches and end crater cracks at end of seam due to the melt
cooling too quickly.
Manual pulsing (see chapter 3.6.8)
Welding with reduced current at the beginning of the seam in the event of
edges or heat accumulation.
3.6.10 Gas post-flow time
The gas post-flow time is set as described in Chapter 3.6.1.
The gas post-flow time is the period of time after the arc has been extinguished
before the inert gas valve is closed. The post-flow of inert gas protects the
workpiece and the tungsten needle from the oxygen in the air until they have
cooled. However, the preselected gas post-flow time only takes effect if welding
has taken place previously. Accidentally pressing the button will not start the gas
post-flow timer running. This gas management function reduces gas
consumption.
Gas valve
Welding current
Torch button 1
Содержание INVERTIG.PRO digital 240 DC, 240 AC/DC
Страница 1: ...GB OPERATING INSTRUCTIONS TIG inert gas welding units INVERTIG PRO digital 240 450 DC AC DC...
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Страница 81: ...Components 81 Figure 53 Exploded view of an INVERTIG PRO digital 240 DC 450 AC DC left...
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