Fabricator 211i basic welding, 06 tig (gtaw) welding problems – Tweco 211i Fabricator User Manual

Page 80

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FABRICATOR 211i

BASIC WELDING

BASIC WELDING

4-20

Manual 0-5157

4.06 TIG (GTAW) Welding Problems

FAULT

CAUSE

REMEDY

1 Excessive bead 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

flat or undercut at edges

of weld or excessive burn

through.

Welding current is too

high

Decrease weld current.

3 Weld bead too small or

insufficient 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 penetration in

butt joint.

Travel speed too slow

Increase travel speed.

5 Uneven leg length in fillet

joint

Wrong placement of

filler rod

Re-position filler rod.

6 Electrode melts or oxidizes

when an arc is struck.

A TIG Torch lead connect-

ed to positive welding

terminal.

A Connect TIG Torch lead to negative weld-

ing terminal.

B No gas flowing to weld-

ing region.

B Check the gas lines for kinks or breaks

and gas cylinder contents.

C TIG Torch is clogged

with dust or dirt.

C Clean TIG Torch.

D Gas hose is cut.

D Replace gas hose.

E Gas passage contains

impurities.

E Disconnect gas hose from the rear of

Power Source then raise gas pressure

and blow out impurities.

F Gas regulator turned

OFF.

F Turn ON.

G TIG Torch valve is

turned OFF.

G Turn ON.

H The electrode is too

small for the welding

current.

H Increase electrode diameter or reduce the

welding current.

I Power source is set for

MIG welding.

I Set Power Source to LIFT TIG mode.

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