Operation
OMCTT5621E18
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9. Operation
9.1 TIG Welding operation
The ON/OFF operation of the torch switch enables you
to perform welding as shown in the following diagram.
Turn the torch switch on with the torch put close to base
material, the high frequency wave comes first, and arc
follows.
<Regarding the following diagrams>
• They assume that values other than “0” is set as the pre-
flow, post-flow, up slope and down slope times.
• They assume that the output current is set to pulse “ON”.
(In the case of pulse “OFF”, there should be no pulse
current or pulse width.)
1) “Crater: OFF” welding operation
Use this welding mode mainly for tack welding, the repe
-
tition of short welding, and thin plate welding.
Turn the torch switch on and off with the “Crater “ switch
set to “OFF”, and welding arc starts and stops in syn
-
chronization with such switch operations. (There is no
self-hold, initial current and crater current.)
WARNING
Pressing the torch switch by mistake may cause an electric shock.
When inspecting or replacing any torch parts, make sure to turn the power switch off in
advance.
(1) Torch: ON
(2) Torch: OFF
Arc ON
Arc OFF
* Pulse frequency (1/T): Number of repeat times of this waveform per second (a section
marked with T).
* Pulse width (tp/T): The proportion of Pulse Current Width (tp) to the total (T) of Pulse Current
Width and Welding Current Width
Torch switch
Output current
Shield gas
ＯＮ
ＯＦＦ
Pulse current
Welding current
Pre-flow
Post-flow
(No “Self-hold”)
(1)
(2)
T
tp
* Pulse frequency = 1/T
* Pulse width = tp/T
