Razorweld KUMJRRW160, Operating Manual

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7: Arc wanders during DC welding
Possible Reason Suggested Remedy
Poor gas flow Check and set the gas flow between 20 - 35 CFH flow rate
Incorrect arc length
Lower torch so that the tungsten is off of the work piece 5/64” - 13/64”
Tungsten incorrect or in poor condi-
tion
Check that correct type of tungsten is being used. Remove 25/64” from the weld end of
the tungsten and re sharpen the tungsten
Poorly prepared tungsten Grind marks should run lengthwise with tungsten, not circular. Use proper grinding
method and wheel.
Contaminated base metal Remove contaminating materials like paint, grease, oil, and dirt, including mill scale from
base metal.
Contaminated filler wire Remove all grease, oil, or moisture from filler metal.
Incorrect filler wire Check the filler wire and change if necessary
8: Arc difficult to start or will not start DC welding
Possible Reason Suggested Remedy
Incorrect machine set up Check machine set up is correct
No gas, incorrect gas flow Check the gas is connected and cylinder valve open, check hoses, gas valve and torch
are not restricted. Set the gas flow between 20 - 35 CFH flow rate
Tungsten is contaminated Remove 25/64” of contaminated tungsten and re grind the tungsten
Incorrect tungsten size and or tung-
sten being used
Check and change the size and or the tungsten if required
Loose connection Check all connectors and tighten
Earth clamp not connected to work Connect the earth clamp directly to the work piece wherever possible
Loss of high frequency Check torch and cables for cracked insulation or bad connections. Check spark gaps
and adjust if necessary
continued- TIG WELDING TROUBLE SHOOTING