8785081
200A AC/DC Dial Control TIG Welder 202KE
V4.2
26
For technical questions call 1-800-665-8685
TIG WELDING
Problem(s)
Possible Cause(s) Suggested Solution(s)
Tungsten
burning away
quickly.
1. Incorrect Gas.
2. No gas.
3. Inadequate gas
flow.
4. Back cap not
fitted correctly.
5. Torch connected
to DC+.
6. Incorrect
tungsten being
used.
7. Tungsten
oxidized after
weld is finished.
1. Check that pure Argon is being used.
2. Check that the gas cylinder contains gas is
connected and the torch gas valve is open.
3. Check the gas is connected, check hoses, gas
valve and torch are not restricted. Set the gas
flow between 25 to 31 CFH flow rate.
4. Make sure the torch back cap is fitted so that
the o-ring is inside the torch body.
5. Connect the torch to the negative DC output
terminal.
6. Check and change the tungsten type if
necessary.
7. Keep shielding gas flowing 10 to 15 seconds
after arc stoppage. One second for each 10
amps of weld current.
Contaminated
tungsten.
1. Touching
tungsten into
the weld pool.
2. Touching the
filler wire to the
tungsten.
3. Tungsten
melting into the
weld pool.
1. Keep tungsten from contacting weld puddle.
Raise the torch so that the tungsten is off the
workpiece 5/64 to 3/8 inches.
2. 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.
3. Check that correct type of tungsten is being
used. Too much current for the tungsten size so
reduce the amps or change to a larger tungsten.
Porosity - poor
weld
appearance and
colour.
1. Incorrect Gas.
2. Inadequate gas
flow / gas leaks.
3. Moisture on the
base metal.
4. Contaminated
base metal.
5. Contaminated
filler wire.
6. Incorrect filler
wire.
1. Check that pure Argon is being used.
2. Check the gas is connected, check hoses, gas
valve and torch are not restricted. Set the gas
flow between 12 to 21 CFH flow rate. Check
hoses and fittings for holes, leaks etc.
3. Remove all moisture from base metal before
welding.
4. Remove materials like paint, grease, oil and
dirt, including mill scale from base metal.
5. Remove all grease, oil, or moisture from filler
metal.
6. Check the filler wire and change if necessary.
