Special functions and options
Arc break watch-
dog function
If the arc breaks and the current does not start to flow again within the time specified in
the set-up menu, the power source cuts out automatically. The service code "no | Arc"
appears on the control panel.
To start the welding process again, press any key on the control panel or the torch trig-
ger.
The settings for the arc break watchdog set-up parameter (Arc) are described in "TIG
set-up 2nd" section.
Ignition time-out
function
The power source has an ignition time-out function.
Once the torch trigger is pressed, gas pre-flow begins immediately. Ignition then begins.
If an arc does not appear within the time specified in the set-up menu, the power source
cuts out automatically. The service code "no | IGn" appears on the control panel.
"E55" is displayed on the JobMaster TIG welding torch.
To try again, press any key on the control panel or press the torch trigger.
The settings for the ignition time-out parameter (ito) are described in the "TIG set-up
2nd" section.
TIG pulsing The welding current set at the start of welding is not always ideal for the welding process
as a whole:
- if the amperage is too low, the base material will not melt sufficiently,
- if overheating occurs, the liquid weld pool may drip.
The TIG pulsing function (TIG welding with pulsing welding current) offers a remedy:
a low ground current I-G rises steeply to the significantly higher pulse current I1 and,
depending on the set dcY (duty cycle) time, drops back to the ground current I-G.
In TIG pulsing, small sections of the welding location melt quickly and then solidify again
quickly.
In manual applications using TIG pulsing, the welding wire is applied in the maximum
current phase (only possible in the low frequency range: 0.25 - 5 Hz). Higher pulse fre-
quencies are mainly used in automatic mode to stabilise the arc.
TIG pulsing is used for out-of-position welding of steel pipes or when welding thin sheets.
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