Tweco 200 ACDC Arcmaster(April2006) - Manual (Page 50)

ARCMASTER 200 AC/DC
10-2 April 13, 2006
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.
Table 10-1 (continued): TIG Welding Problems