Tig Welding Issues - Lincoln Electric ASPECT 375 Operator's Manual

ASPECT™ 375

TIG WELDING ISSUES

SYMPTOMS
Poor starting
Black area along weld
bead
Output quits
momentarily; gas flow
and hi-freq are also
interrupted
Arc flutters
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
Observe all Safety Guidelines detailed throughout this manual
POSSIBLE CAUSE
Poor work clamp connection
Wrong "DIA" setting
Start current is too low
Oily or organic contamination on
work piece
Tungsten electrode may be
contaminated
Leaks in gas line or torch
connection
Gas tank is near empty
May be caused by hi-freq
interference
Faulty Components, PC Boards or
Connections
Pulser may be turned on
inadvertently
Electrode may be too large for
current setting
Insufficient gas shielding
Contaminated gas or leaks in gas
line, torch, or connections
RECOMMENDED COURSE OF ACTION
Check and secure work
connection
Access "GTAW" menu (see
operation section) and set DIA
for Intellistart
Tungsten size
Increase start current
Clean work piece
Grind to clean electrode
Check connection
Replace the gas tank
Check for proper machine
ground connection; surrounding
mach ines that generate hi-freq
also should be grounded
properly
Contact your local Lincoln
A uthorized Field Service Facility.
Turn Pulser off
Use smaller Tungsten
Adjust flow rate
Check gas line & connections
CAUTION
E-3
TROUBLE SHOOTING
TM "AUTO" or proper