Troubleshooting Welding - LOTOS TIG200 Operation Manual

 OUTPUT CURRENT CANNOT REACH RATED VALUE
Deviation of power voltage from the rated value will lead to unconformity of output current
value with the set value. When power voltage is lower than the rated value, maximum
output current of the welder may also be lower than the rated value.
 TUNGSTEN TIP GETS BURNT TOO FAST
Reduce the heat of the tungsten tip by twisting knob 6 towards "-".
PROBLEMS
Weak Penetration
(For aluminum Tig welding)
Weak Penetration
(For aluminum Tig welding)
Tungsten Contaminated
Poor Welding Appearance
Crater at the End of the Weld
Bead
Weld Bead is Cracking
Material is Warping
Melting Tungsten
Contamination in Weld Bead

TROUBLESHOOTING WELDING

RECOMMENDED ACTION
 Increase the welding heat, use 220VAC and use higher
output voltage
 Twist knob 6 towards "-" to transfer more heat to the
work piece
 Increase the welding heat, use 220VAC and use higher
output voltage
 Keep Tungsten 1/8 to ¼ inches from the base metal.
 Re-sharpen the Tungsten if the tip is worn.
 The angle between the filler metal and the torch must be
less than 90 degrees.
 Keep the torch on the base metal while the post flow
shielding gas flows to protect the metal and tungsten.
 Reduce current with pedal and add more filler at the end
of the weld.
 Reduce the heat more times between passes.
 Preheat the base metal and reduce the filler wire size.
 Clamp the work piece tightly.
 Add more tack welds until rigidity and stiffness is
developed.
 To reduce heat by spreading the welding out around the
area. This can be done by using Stitch Welding techniques
and by alternating sides, taking your time, allowing the
pieces to cool between passes.
 Make sure there is no gas leaking, adjust the gas flow,
shift more negative on the knob 6.
 Increase the Tungsten diameter. Increase the Post Flow.
For Tig welding, please use 100% pure argon.
 Clean the base metal to make sure to remove any oil,
coating or debris.
 Remove tungsten from torch and re-sharpen the tungsten.
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