Tweco 185TSW DC CC - Manual (Page 44)

44
Description Possible Cause Remedy
6 Electrode melts
when arc is struck.
A Electrode is connected to the
‘+’ terminal.
A Connect the electrode to the
‘
−
’ terminal.
B WAVE BALANCE is greater
than 50%.
B Reduced WAVE BALANCE
to below 50% or increase the
electrode size.
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
or 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 can
not 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 Torch lead is disconnected. B Connect it to the ‘
−
‘
terminal.