Tig Troubleshooting - Viper SYNERGIC MIG165 Operating Manual

21. TIG Troubleshooting
21.1 Tungsten burning away quickly
• Incorrect gas or no gas: Use pure argon. Check cylinder has gas is connected, turned on and torch valve is open.
• Inadequate gas flow: Check the gas is connected, check hoses, gas valve and torch are not restricted.
• Back cap not fitted correctly: Make sure the torch back cap is fitted so that the O-ring is inside the torch body.
• Torch connected to DC+: Connect the torch to the DC- output terminal.
• Incorrect tungsten being used: Check and change the tungsten type if necessary.
• Tungsten being oxidised after weld is finished: Keep shielding gas flowing 10-15 seconds after arc stoppage. 1 second
for each 10 amps of weld current.
21.2 Contaminated tungsten
• Touching tungsten into the weld pool: Keep tungsten from contacting weld puddle. Raise the torch so that the
tungsten is off of the work piece 2-5mm.
• Touching the filler wire to the tungsten: Keep the filler wire from touching the tungsten during welding, feed the filler
wire into the leading edge of the weld pool in front of the tungsten.
21.3 Porosity - Poor weld appearance and colour
• Wrong gas / poor gas flow / gas leaks: Use pure argon. Gas is connected, check hoses, gas valve and torch are not
restricted. Set the gas flow between 6-12 L/min. Check hoses and fittings for holes, leaks etc.
• Contaminated base metal: Remove moisture and materials like paint, grease, oil, and dirt 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.
21.4 Yellowish residue/smoke on the alumina nozzle & discoloured
tungsten
• Incorrect gas: Use pure argon gas.
• Inadequate gas flow: Set the gas flow between 6-12 L/min flow rate.
• Alumina gas nozzle too small: Increase the size of the alumina gas nozzle.
21.5 Unstable arc during DC welding
• Torch connected to DC+: Connect the torch to the DC- output terminal.
• Contaminated base metal: Remove materials like paint, grease, oil, and dirt, including mill scale from base metal.
• Tungsten is contaminated: Remove 10mm of contaminated tungsten and re-grind the tungsten.
• Arc length too long: Lower torch so that the tungsten is off of the work piece 2-5mm.
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VIPER MIG 165
OPERATING MANUAL