Tweco 300 DC Arcmaster - Manual (Page 52)

ARCMASTER 300 ACDC
10-2 February 22, 2006
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.
Description Possible Cause Remedy
Table 10-1 (continued): TIG Welding Problems