Tweco 160 TS Arcmaster - Manual (Page 42)

ARCMASTER ® 160TS
March 31, 2006 9-2
Description Possible Cause Remedy
9. Poor weld fi nish. Inadequate shielding gas. Increase gas fl ow or check gas line for
gas fl ow problems.
10. Arc fl utters 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 fl utter.
11. Welding arc can not be
established.
A. Work clamp is not connected to
the work piece or the work/torch
leads are not connected to the right
welding 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 fl ow 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 electrode type. Refer
to Basic TIG Welding Guide
C. Gas fl ow 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.
9.02 Stick Welding Problems
Description Possible Cause Remedy
1. Gas pockets or voids in
weld metal (Porosity).
A.
B.
C.
Electrodes are damp.
Welding current is too high.
Surface impurities such as oil, grease,
paint, etc.
A.
B.
C.
Dry electrodes before use.
Reduce welding current.
Clean joint before welding.
2. Crack occurring in
weld metal soon
after solidifi cation
commences
A.
B.
C.
Rigidity of joint.
Insuffi cient throat thickness.
Cooling rate is too high.
A .
B .
C.
Redesign to relieve weld joint of severe
stresses or use crack resistance
electrodes.
Travel slightly slower to allow greater build
up in throat.
Preheat plate and cool slowly.
3. A gap is left by failure of
the weld metal to fi ll the
root of the weld.
A.
B.
C.
Welding current is too low.
Electrode too large for joint.
Insuffi cient gap.
A.
B .
C.
Increase welding current
Use smaller diameter
electrode.
Allow wider gap.
D. Incorrect sequence. D. Use correct build-up sequence.