PRO-POINT ARC 170 Manuel D'utilisation page 42

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TIG WELDING
POSSIBLE CAUSE(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 being
oxidized after weld is
finished.
Contaminated tungsten.
1. Touching tungsten into
the weld pool.
2. Touching the filler wire
to the tungsten.
3. Tungsten melting into
the weld pool.
42
ARC 170 DUAL VOLTAGE ARC/TIG WELDER
For technical questions call 1-800-665-8685
SUGGESTED SOLUTION(S)
1. Check that pure Argon is being used.
2. Check the gas cylinder contains gas
and 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 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.
1. Keep tungsten from contacting weld
puddle. Raise the torch so that the
tungsten is off of the workpiece 0.07
to 0.19 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.
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