Tweco 400i Transmig - Manual (Page 47)

TRANSMIG 400 i
6-7 July 18, 2008
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 to 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
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
C Gas flow incorrectly set,
cylinder empty or the torch
valve is off
C Select the right flow rate,
change cylinders or turn
torch valve on
12 Arc start is not smooth A Tungsten electrode is too
large for the welding current
A Select the right size
electrode. Refer to Basic
TIG Welding Guide
B The wrong electrode is
being used for the welding
job
B Select the right size
electrode. Refer to Basic
TIG Welding Guide
C Gas flow rate is too high C Select the correct rate for
the welding job. Refer to
Basic TIG Welding Guide
D Incorrect shielding gas is
being used
D Select the right shielding
gas. Refer to Basic TIG
Welding Guide
E Poor work clamp
connection to work piece
E Improve connection to
work piece
Possible Cause Description Remedy