Tweco Fabricator 141i Operating Manual Manual de usuario descargar pdf (Pagina 86)

Fabricator 141i

BASIC WELDING GUIDE 4-26 Manual 0-5145

FAULT CAUSE REMEDY

7 Dirty weld pool A Electrode contaminated

by contact with work

piece or ﬁller rod mate-

rial.

A Clean the electrode by grinding off the con-

taminates.

B Work piece surface has

foreign material on it.

B Clean surface.

C Gas contaminated with

air.

C Check gas lines for cuts and loose ﬁtting or

change gas cylinder.

8 Poor weld ﬁnish Inadequate shielding

gas.

Increase gas ﬂow or check gas line for gas

ﬂow problems.

9 Arc start is not smooth. A Tungsten electrode is

too large for the weld-

ing current.

A Select the right size electrode. Refer to Table

4-7 Current Ranges for Various Tungsten

Electrode Size.

B The wrong electrode

is being used for the

welding job.

B Select the right electrode type. Refer to Table

4-9 Tungsten Electrode Types.

C Gas ﬂow rate is too

high.

C Select the right rate for the welding job. Refer

to Table 4-10.

D Incorrect shielding gas

is being used.

D Select the right shielding gas.

E Poor work clamp con-

nection to work piece.

E Improve connection to work piece.

F Tungsten not properly

sharpened.

F Grind tungsten to proper shape.

10 Arc ﬂutters during TIG

welding.

Tungsten electrode is

too large for the weld-

ing current.

Select the right size electrode. Refer to Table

4-7 Current Ranges for Various Electrode

Size.

11 Tungsten blackens due to

lack of shielding gas or

wrong shield gas.

A Gas valve on the TIG

Torch has not be turned

on.

A Turn on TIG Torch gas valve before you

commence welding.

B Gas cylinder valve off

or TIG Torch hose not

connected to regulator

B Turn on gas cylinder valve or connect TIG

Torch hose to regulator.

C Incorrect shielding gas

is being used.

C Select the right shielding gas.

Table 4-10: TIG (GTAW) Welding Problems

1 2 ... 81 82 83 84 85 86 87 88 89 90 91 ... 103 104

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Tweco Fabricator 141i Operating Manual Manual de usuario Pagina 86

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