Intended Use; Applications; Tig Welding; Activarc - EWM Tetrix 351 Smart FW Operating Instructions Manual

Intended use

Applications

Intended use
3
Hazards due to improper usage!
Hazards may arise for persons, animals and material objects if the equipment is not
used correctly. No liability is accepted for any damages arising from improper usage!
•
The equipment must only be used in line with proper usage and by trained or expert staff!
•
Do not modify or convert the equipment improperly!
3.1 Applications
3.1.1

TIG welding

TIG welding with direct current.
Non-contact HF ignition or contact ignition with Liftarc.
3.1.1.1

activArc

The EWM activArc process, thanks to the highly dynamic controller system, ensures that the power
supplied is kept virtually constant in the event of changes in the distance between the welding torch and
the weld pool, e.g. during manual welding. Voltage losses as a result of a shortening of the distance
between the torch and molten pool are compensated by a current rise (ampere per volt - A/V), and vice
versa. This helps prevents the tungsten electrode sticking in the molten pool and the tungsten inclusions
are reduced. This is particularly useful in tacking and in spot welding.
3.1.1.2

spotArc

This process is suitable for tack welding or joint welding of metal sheets made from steel and CrNi alloys
up to a thickness of approximately 2.5 mm. Metal sheets of different thicknesses can also be welded on
top of one another. As this is a one-sided process, it is also possible to weld metal sheets onto tubular
sections such as round or square pipes. In arc spot welding, the arc melts through the upper metal sheet
and the lower metal sheet is melted onto it. This produces flat, fine-textured welding tacks which require
little or no post weld work, even in visible areas.
3.1.1.3

Spotmatic

In contrast to the operating mode spotArc, the arc ignites not by pressing the torch trigger as is usual, but
by shortly touching the tungsten electrode against the workpiece. The torch trigger is used for process
activation.
3.1.2

MMA welding

Manual arc welding or, for short, MMA welding. It is characterised by the fact that the arc burns between
a melting electrode and the molten pool. There is no external protection; any protection against the
atmosphere comes from the electrode.
16
WARNING
099-000128-EW501
16.07.2014