Parweld XTM 201Di, Operator'S Manual

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Adjust (2) Post Gas Time and (1) Down Slope to
User Preference
7.6 TIG Welding Operation Guide
Contact the tip of the tungsten electrode down onto the work piece
with the torch at around 70 ˚ from vertical. Press the trigger to switch
on the gas and power, then lift the torch up from the work piece to
draw out an arc. To prevent melting of the end of the tungsten do this
in a smooth rapid movement.
Problem Cause/Corrective Action
Porosity - small cavities or holes
resulting from gas pockets in
weld metal.
Inadequate shielding gas
coverage. Check for proper
gas flow rate.
Remove spatter from gun
nozzle.
Check gas hoses for leaks.
Eliminate drafts near welding
arc.
Place nozzle 6-13 mm from
work piece and hold gun near
bead at end of weld until
molten metal solidifies.
Wrong gas. Use welding
grade shielding gas; change to
different gas.
Dirty welding wire. Use clean,
dry welding wire. Eliminate
pickup of oil or lubricant on
welding wire from feeder or
liner.
Work piece dirty. Remove all
grease, oil, moisture, rust,
paint, coatings, and dirt from
work surface before welding.
Use a more highly deoxidizing
welding wire (contact supplier).
Welding wire extends too far
out of nozzle.
Be sure welding wire extends
not more than 13 mm beyond
nozzle.
Incomplete fusion to base metal. Work piece dirty. Remove all
grease, oil, moisture, rust,
paint, coatings, and dirt from
work surface before welding.
Insufficient heat input. Select
higher voltage range and/or
adjust wire feed speed.
Improper welding technique.
Place stringer bead in proper
locations at joint during
welding.
Adjust work angle or widen
groove to access bottom
during welding.
Momentarily hold arc on
groove side walls when using
weaving technique.
Keep arc on leading edge of
weld puddle. Use correct gun
angle of 0 to 15 degrees.
At the end of the weld release the trigger and allow the power and
gas to switch off before moving the torch from the weld.
8.0 Fault Finding
• If error message is displayed allow machine to cool with
power off for 10 minutes.
• If error remains switch off and on again.
• Reduce welding current to prevent over current condition.
• If error remains contact your local service centre.
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8.1 MIG Welding Problems