Tweco 300 ACDC Arcmaster - Manual (Page 48)

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Description Possible Cause Remedy
7 Dirty weld pool. A Electrode contaminated through
contact with work piece or filler
rod material.
A Clean the electrode by grinding
off the contaminates.
B Gas contaminated with air. B Check gas lines for cuts
and loose fitting or change
gas cylinder.
8 Electrode melts or
oxidizes when an arc
is struck.
A No gas flowing to welding region. A Check the gas lines for
kinks for breaks and gas
cylinder contents.
B Torch is clogged with dust. B Clean torch.
C Gas hose is cut. C Replace gas hose.
D Gas passage contains impurities. D Disconnect gas hose from
torch then raise gas pressure
and blow out impurities.
E Gas regulator turned OFF. E Turn ON.
F Torch valve is turned OFF. F Turn ON.
G The electrode is too small for
the welding current.
G Increase electrode diameter or
reduce the welding current.
H WAVE BALANCE is set
above 50%.
H Reduced WAVE BALANCE to
below 50% or increase the
electrode size.
9 Poor weld finish. Inadequate shielding gas. Increase gas flow or check gas
line for gas flow problems.
10 Arc flutters during TIG
welding.
A Tungsten electrode is too large
for the welding current.
A Select the right size electrode.
Refer to Basic TIG Welding
guide.
B Absence of oxides in the
weld pool.
B Refer Basic TIG Welding Guide
for ways to reduce arc flutter.
11 Welding arc cannot be
established.
A Work clamp is not connected to
the work piece or the work/torch
leads are not connected to the
right welding terminals.
A Connect the work clamp to the
work piece or connect the
work/torch leads to the right
welding terminals.
B
C
Torch lead is disconnected.
Gas flow incorrectly set, cylinder
empty or the torch valve is OFF.
B
C
Connect it to the ‘
−‘ terminal.
Select the right flow rate,
change cylinders or turn torch
valve ON.
Table 10-1 (continued). TIG Welding Problems