Paton PROMIG-160, Инструкция по эксплуатации

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PATON ProMIG DC MMA/TIG/MIG/MAG
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4.1.1 WELDING PROCESS CYCLE - TIG-LIFT
See section 6.1 for the procedure for switching the value of any function.
4.1.2 TIG-LIFT ARC STRIKING FUNCTION
This function is set by default on this model of the machine and is designed for holders with
contact arc ignition, without the use of oscillators or similar devices, but unlike the classic
method it completely eliminates the shock current at the moment of ignition. This feature
significantly reduces the destruction and penetration of the non-fusible tungsten electrode
into the weld seam, which is a very unfavourable phenomenon.
WARNING! For the function to work properly. The workpiece must be cleaned at the point
of arc ignition. The valve on the torch must be opened independently before welding and
closed after the process is complete.
The way to use this function is to touch the electrode to the piece. You can hold the electrode
in this position indefinitely, and when the user considers it ready to start welding (for
example, when the protective mask is on the eyes and the place is well purged with safety
gas), it is just necessary to start SLOWLY raising the tip of the sharpened electrode from the
piece. The machine will detect this moment and will take it as a signal to start the welding
process, thereby it will begin to increase the welding current to the set value. The higher the
main operating current, the faster you need to raise the electrode, otherwise it will melt. If
you do not get it right away and, for example, the tungsten electrode sticks when you try to
raise it, you need to start all over again and at the next attempt to slightly increase the rate
of rising. If there was no attempt to ignite the electrode at all with a small flash, then it is
necessary to slightly decrease the lifting speed at the next approach. For error-free ignition,
you need some time to get used to it. We will consider the time of smooth current rise [t.uP]
up to the set value in the next paragraph.