Sideways grinding marks are not nearly as much of a problem on thicker metal because.
Scratch start tig sheet metal.
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Assuming my mig using 025 wire couldn t.
Sure it would only be steel but i d beat o a in area affected by welding.
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It involves flicking tungsten across some metal until the arc starts.
It is definitely not a pretty process but also an unsuitable one for tig welding.
4 1 out of 5 stars 14.
Scratch start the oldest method is scratch start.
This is a great way to convert your stick machine into a tig welder and you can check out our article here if that interests you.
Weldflame wp 17fv 12r 12 ft flexhead valve 150amp air cooled tig welding complete torch.
It works by literally scratching the surface of the workpiece to form a short circuit to start an arc.
There are also hand controls that can be added to tig torches.
Weldingcity tig welding torch wp 17 25r complete ready to go package air cool 25 foot cable 150amp.
Amazon s choice for scratch start tig kit.
You can start at a high amperage and get a crisp start.
So a lot of pipe welders use a 1 8 electrode even for amperages around 100 amps.
However this technique may cause the tungsten to enter the weld and carries the risk of contamination of the weld.
Speaking of which i still need and o a setup haha.
And i know that some pieces may be really thin sheet metal and i wonder if a scratch start tig setup would be worth investing in.
With scratch start tig your amperage is constant and you won t have to use any sort of pedal.
For applications like pipe welding using a scratch start tig setup start amperage is welding amperage.