Lincoln Electric IM520-B manual TIG Mode Problems

PROBLEMS

POSSIBLE AREAS OF

(SYMPTOMS)

MISADJUSTMENT(S)

TIG MODE PROBLEMS

Machine output is intermittently

1.

Problem may be caused by

lost. Gas flow and high frequency

high frequency interference.

are also interrupted.

Make sure that the machine is

grounded properly according

to the installation instructions.

If there are other high

frequency sources in the area,

make certain that they are

grounded properly.

2.

Check arc start switch or

amptrol for proper operation

and loose connections.

Arc “Flutters” when TIG welding.

1.

Tungsten electrode may be

too large in diameter.

2.

Tungsten not “Sharp” when

welding in DC negative mode.

3.

If helium is used as a

shielding gas, then reduce the

percentage of helium.

4.

Adjust flow rate of shielding

gas.

5.

Check hoses and connections

for leaks.

Lack of penetration in AC TIG

1.

Manual balance control set

welding.

improperly - set to negative

10 (-10) for maximum

penetration.

Black areas along weld bead.

1.

Tungsten electrode may be

contaminated. Replace or

sharpen.

2.

Shielding gas flow may be

insufficient.

3.

Contaminated gas or faulty

gas line or torch.

Black areas along weld bead at or

1.

Increase post flow time.

near end of weld.