Alternating Current Waveforms; Automatic Ac Frequency - EWM T4.02 Operating Instructions Manual

Functional characteristics
TIG welding
5.1.3.3

Alternating current waveforms

Selection
Display
5.1.3.4

Automatic AC frequency

Selecting the function AC frequency automatic is only possible in the JOB area 1-100. Activation takes
place in the functional sequence using the parameter frequency
value is reduced until the parameter
light comes on when the function is activated.
The machine control takes over the regulation or setting of the alternating current frequency depending
on the set main current. The lower the welding current, the higher the frequency and vice versa. This en-
sures a concentrated, directionally stable arc is achieved when welding currents are low. The load on the
tungsten electrode is minimised when the welding currents are high ensuring a longer service life.
The use of a foot-operated remote control with this function reduces manual intervention by the user
during the welding process to a minimum.
18
Setting/selection
Alternating current waveforms
------ Rectangular - Highest energy input (ex works)
------ Trapezoidal - An all-rounder, suitable for most applications
------ Sine - Low noise level
Figure 5-5
1
(AC frequency automatic) is shown in the display. The signal
Figure 5-6
EXIT
4s
. By turning to the left, the parameter
099-00T402-EW501
02.07.2020