Optimising The Ignition Characteristics For Pure Tungsten Electrodes; Optimal And Fast Spherical Cup Formation - EWM Tetrix 351 Operating Instructions Manual

5.13.8 Optimising the ignition characteristics for pure tungsten electrodes

This parameter can be used to improve the ignition characteristics of "pure tungsten electrodes", for
example. The parameter is a %-value (factory-set to 20) and is changed across all JOBs.
Control element

5.13.9 Optimal and fast spherical cup formation

A conically ground tungsten electrode (approx. 35°) is generally required to form an ideal
spherical cup.
Operating
element
•
Use a sample workpiece.
•
Ignite arc with HF ignition (non-contact) and form required spherical cup for the application in
question.
099-000115-EW501
17.06.2015
Action Result
Select Ignition Characteristics parameter
1 x
The signal lights for the selected electrode
diameter and ignition current AMP% flash for
approx. 5 seconds. The parameter value can
be optimised on the rotary transducer during
this time.
Set parameter value
Increase parameter value:
more ignition power
Reduce parameter value:
less ignition power
Action Result
Select AC/DC welding with appropriate material:
AlMg aluminium and magnesium alloys.
AlSi aluminium and silicon alloys or
Al99 aluminium 99%
Ignition optimisation selection
The signal light of the selected needle diameter starts flashing.
Tungsten balling selection
The main current signal light flashes rapidly.
The current for tungsten balling is displayed and can be adjusted during
the process.
This function is switched off by pressing the ignition optimisation push-
button again or automatically after the set gas post-flow time has
elapsed.
Design and function
TIG Synergic operating principle
Display
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