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5.7.9.4
SpotArc
This process is suitable for tack welding or joint welding of metal sheets made from steel and CrNi alloys
up to a thickness of approximately 2.5 mm. Metal sheets of different thicknesses can also be welded on
top of one another. As this is a one-sided process, it is also possible to weld metal sheets onto tubular
sections such as round or square pipes. In arc spot welding, the arc melts through the upper metal sheet
and the lower metal sheet is melted onto it. This produces flat, fine-textured welding tacks which require
little or no post weld work, even in visible areas.
Selecting and setting TIG spotArc
Operating
element
The process ends when the set spotArc time elapses or if the torch trigger is released
prematurely.
Sequence:
•
Press and hold torch trigger 1.
•
The gas pre-flow time elapses.
•
HF ignition pulses jump from the electrode to the workpiece, the arc ignites.
•
The welding current flows and immediately assumes the value set for the ignition current I
•
HF is switched off.
•
The welding current increases in the adjusted up-slope time to the main current AMP.
The up-slope and down-slope times should be set to "0" to achieve an effective result.
099-000098-EW501
03.08.2011
Action
Result
Signal light
x x
The spot time can be set for approx. 4 sec. using the
"Welding parameter setting" rotary transducer (signal light
flashing)
Set spot time "tP" (signal light flashing)
Design and function
on
Figure 5-12
NOTE
NOTE
TIG welding
Display
.
start
35
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