Lincoln Electric 405M, 355M service manual TIG Gtaw, Smaw

B-6 OPERATION B-6

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TIG GTAW

The TIG mode features continuous control from 5 to 425 amps. The TIG mode can be run in either the Touch Start TIG or Scratch start mode.

The Arc Control level selects the starting mode.

Between –10 and 0, the Touch Start TIG mode is selected. The OCV is controlled below 10V and the short circuit "TIG touch" current is maintained at approximately 25 amps, independent of the preset current. When the tungsten is lifted, an arc is initiated and the output is regulated at the preset value. A set- ting of 0, results in the most positive arc initiation. A setting of -10 reduces the start procedure to start the weld, and from there, to ramp to the welding proce- dure over a specified amount of time.

A setting above 0 selects a Scratch Start. Full OCV is available when the arc initiates the output is regulated to the preset value

Typically starting procedure on a higher “+” setting is known as a “Hot Start”. Setting a starting procedure on a lower setting is known as a “Cold Start”.

NOTE: Later versions of weld software eliminated the Arc Control Function in TIG mode and only allow for “Touch Start” operation.

SMAW

In SMAW (STICK mode), the arc control adjusts the arc force. It can be set to the lower range (0 to -10) for a soft and less penetrating arc characteristic or to the higher range (0 to +10) for a crisp and more penetrat- ing arc. Normally, when welding with cellulosic types of electrodes (E6010, E7010, E6011), a higher energy arc is required to maintain arc stability. This is usually indicated when the electrode sticks to the work-piece or when the arc pops-out during manipulative tech- nique. For low hydrogen types of electrodes (E7018, E8018, E9018, etc.) a softer arc is usually desirable and the lower end of the Arc Control suits these types of electrodes. In either case the arc control is available to increase or decrease the energy level delivered to the arc.

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Recommended Welding Procedures for Power Mode

TABLE B.2

MATERIAL

Aluminum 4043

Aluminum 5356

Mild Steel

Mild Steel

Mild Steel

Mild Steel

Mild Steel

Mild Steel

Stainless Steel

Stainless Steel

WIRE

E4043

E5356

L56

L56

L56

L56

L56

L56

E308L

E308L

WIRE SIZE

0.035

0.035

0.025

0.025

0.030

0.030

0.035

0.035

0.030

0.035

GAS

100% Agr.

100% Agr.

100% CD2

75/25 Ar/CO2

100% CD2

75/25 Ar/CO2

100% CD2

75/25 Ar/CO2

Tri-mix

Tri-mix

22 ga.

Not

100 / 0.8

Not

90 / 1.0

recommended

recommended

20 ga.

120 / 1.0

120 / 1.0

100 / 0.7

100 / 1.0

80 / 1.5

50 / 0.5

THICKNESS

SETTINGMODE

18 ga.

140 / 1.7

140 / 1.5

110 / 1.5

110 / 1.5

100 / 2.5

100 / 2.5

110 / 2.0

110 / 2.0

16 ga.

190 / 2.0

190 / 2.0

125 / 2.0

125 / 2.0

125 / 3.0

125 / 3.0

140 / 2.5

130 / 2.7

MATERIAL

POWER/WFS

14 ga.

400 / 2.0

400 / 2.5

260 / 3.0

260 / 3.0

160 / 2.3

160 / 2.3

160 / 3.8

160 / 3.5

210 / 3.0

190 / 3.5

12 ga.

330 / 5.0

330 / 4.5

230 / 3.5

230 / 3.5

200 / 5.0

200 / 4.5

270 / 5.0

230 / 6.0

10 ga.

500 / 7.0

500 / 7.0

300 / 6.0

300 / 6.0

240 / 6.5

240 / 7.0

325 / 6.5

300 / 7.0

3/16

570 / 90

600 / 7.8

400 / 7.5

400 / 7.0

1/4

700 / 9.1

700 / 8.5

Not

Not

COMMENTS

Recommended

Recommended

below 400

below 400

WFS

WFS

POWER WAVE 355M/405M