Pulse Welding; Automated Pulses; Thermal Pulsing - EWM Tetrix 451 AC/DC AW FW Operating Instructions Manual

5.7.11 Pulse welding

The following pulse types can be selected:
•
Automated pulsing (TIG DC)
•
Thermal pulsing (TIG AC or TIG DC)
•
Metallurgical pulsing (TIG DC)
•
AC special (TIG AC)

5.7.11.1 Automated pulses

The automated pulses are used with tacking and spot welding of workpieces in particular.
An oscillation in the molten pool is produced by the current-dependent pulse frequency and balance,
which positively influences the ability to bridge the air gap. The pulse parameters required are
automatically specified by the machine control.

5.7.11.2 Thermal pulsing

The operation sequences basically match the standard welding sequences, but there is an additional
switching back and forth between the main current AMP (pulse current) and the secondary current AMP%
(pulse pause current) at the set times. Pulse and pause times and the pulse edges (
entered in seconds on the control.
099-000115-EW501
20.11.2017
Design and function
Figure 5-42
Figure 5-43
TIG Synergic operating principle
and ) are
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