Tweco 160 TS Arcmaster - Manual (Page 41)

ARCMASTER ® 160TS
March 31, 2006 9-1
SECTION 9:
BASIC TROUBLESHOOTING
!
WARNING
There are extremely dangerous voltages and
power levels present inside this product. Do
not attempt to open or repair unless you are an
Accredited Thermal Arc Service Agent and you
have had training in power measurements and
troubleshooting techniques.
If major complex subassemblies are faulty, then the Welding
Power Source must be returned to an Accredited Thermal Arc
Service Agent for repair.
The basic level of troubleshooting is that which can be
performed without special equipment or knowledge.
9.01 TIG Welding Problems
Weld quality is dependent on the selection of the correct consumables, maintenance of equipment and proper welding
technique.
Description Possible Cause Remedy
1. Excessive beard build-up or poor
penetration or poor fusion at
edges of weld. Welding current is too low Increase weld current and/or faulty
joint preparation
2. Weld bead too wide and fl at or
undercut at edges of weld or
excessive burn through Welding current is too high Decrease weld current
3. Weld bead too small or insuffi cient
penetration or ripples in bead are
widely spaced apart Travel speed too fast Reduce travel speed
4. Weld bead too wide or excessive
bead build up or excessive
penetra tion in butt joint Travel speed too slow Increase travel speed
5. Uneven leg length in fi llet joint Wrong placement of fi ller rod Re-position fi ller rod
6. Electrode melts when arc is
struck. A. Electrode is connected to the ‘+’
terminal.
A. Connect the electrode to the ‘−’
terminal.
7. Dirty weld pool. A. Electrode contaminated through
contact with work piece or fi ller rod
material.
A. Clean the electrode by grinding off the
contaminates.
B. Gas contaminated with air. B. Check gas lines for cuts and loose
fi tting or change gas cylinder.
8. Electrode melts or oxidizes when
an arc is struck. A. No gas fl owing 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.