Jasic EVO 2.0 ET-200PACDC, Owner'S Manual

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OPERATION - TIG
Before starting any welding activity ensure that you have suitable eye protection and
protective clothing. Also take the necessary steps to protect any persons within the welding
area.
TIG AC operation steps
AC wave forms
Pressing the AC wave button will allow you to scroll through 3 wave types used in AC welding,
the waveform selections are:
1. Square wave
2. Triangle wave
3. Sine wave
Depending on your selection the corresponding LED indicator will illuminate.
Waveforms summary:
The waveform selection should be made to meet a specific requirement or operator preference and
the waveforms available with the ET
- 200PACDC are as follows:
AC square wave:
This provides fast transitions which provide a responsive and dynamic arc.
The fast transitions eliminate the need for continuous HF. The focused arc
provides good directional control.
Square wave offers improved cleaning of the oxide film on aluminium, more
power and penetration, giving fast puddle freezing along with deep penetration
and fast travel speeds.
Triangular wave:
The triangular wave provides the required peak amperage but the waveform
shape has the effect of reducing the heat input. This reduction in heat input
makes it particularly suited to thin material welding.
Triangle wave is ideally suited to thinner materials as it reduces the heat input
especially in vertical or overhead joints and require to have the puddle freeze
quickly! It also allows for faster travel speeds.
AC sine wave:
The sine wave gives the operator a softer feel arc similar to that of the older
conventional power source. The arc tends to be much wider than the square
wave arc.
The sine wave AC waveform is like the older transformer type TIG welding
machines which mimic
’ s the AC TIG welding performance of ‘ transformer ’
type machines for that similar traditional arc performance.
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