Lincoln Electric IM607 manual Welding in Stick Mode, Smaw Process, Gtaw Process

10 OPERATION 10

the positive portion may also cause the electrode to overheat at high currents causing “tungsten spitting”. The negative portion of the AC wave offers no cleaning action but concentrates more heat on the work. The AC waveform of the Square Wave TIG 175 optimizes cleaning and heating of the work. The result is the capability to weld through the complete range of 12 to 175 amperes in AC TIG or DC- TIG requiring only one electrode, a 3/32” 2% thoriated tungsten.

WELDING IN STICK MODE

1.Put the electrode holder and cable quick connect plug into the electrode output receptacle. Turn clock- wise until tight. Connect the work clamp to the work piece.

2.Set the TIG/STICK switch to “STICK”.

3.Set the Polarity Switch for the type of electrode being used (most commonly DC+).

WARNING

In Stick Mode the output terminal and electrode will be electrically hot whenever the power switch is turned on.

4.Place the electrode in the electrode holder.

5.Turn the power switch to “ON”.

6.Adjust the Current Control to the desired amps.

7.Strike an arc and weld.

NOTE: When the TIG/STICK switch is set to “STICK” the output is always on when the power switch is on. A remote control has no effect on the welding current and the gas flow and high frequency TIG arc starter are dis- abled.

RECOMMENDED ELECTRODE AMPERAGE RANGES - SQUARE WAVE TIG 175

The Square Wave TIG 175 is rated from 10 - 175 Amps.

SMAW Process

ELECTRODE

POLARITY

3/32"

1/8"

5/32"

Fleetweld 5P, Fleetweld 5P+

DC+

40 - 70

75 - 130

90 - 175

Fleetweld 180

DC+

40 - 80

55 - 110

105 - 135

Fleetweld 37

DC+

70 - 95

100 - 135

145 - Max

Fleetweld 47

DC-

75 - 95

100 - 145

135 - Max

Jet-LH MR

DC+

85 - 110

110 - 160

130 - Max

Blue Max Stainless

DC+

40 - 80

75 - 110

95 - 110

Red Baron Stainless

DC+

40 - 70

60 - 100

90 - 140

Mild steel procedures are based on recommended procedures listed in C2.10 8/94 and the maximum rating of the Square Wave TIG 175

Jet-LH MR procedures are based on Jet-LH 78 MR

Blue Max procedures are based on C6.1 6/95

Red Baron Procedure are based on ES-503 10/93

GTAW Process

Electrode Polarity

DC-

AC

Approximate Argon

Electrode Tip Prepration

Sharpened

Balled

Gas Flow Rate

Electrode Type

EWZr

C.F.H. (l/min.)

EWTh-1, EWTh-2

EWTh-1, EWCe-2

EWTh-2, EWLa-1

EWP

EWCe-2, EWLa-1

Stainless

Electrode Size (in.)

EWG

EWG

Aluminum

Steel

.010

Up to 15 A.

Up to 10 A.

Up to 15 A.

3-8

(2-4)

3-8

(2-4)

.020

Up to 15 A.

Up to 15 A.

Up to 20 A.

5-10

(3-5)

5-10

(3-5)

.040

Up to 80 A.

Up to 40 A.

Up to 60 A.

5-10

(3-5)

5-10

(3-5)

1/16

Up to 150 A.

Up to 100 A.

Up to 130 A.

5-10

(3-5)

9-13 (4-6)

3/32

Up to MAX. A.

Up to 160 A.

Up to MAX. A.

13-17 (6-8)

11-15 (5-7)

1/8

X

Up to MAX. A.

X

15-23

(7-11)

11-15

(5-7)

Tungsten electrodes are classified as follows by the American Welding Society (AWS):

Pure

EWP

green

+1% Thoria

EWTh-1 ...

yellow

+2% Thoria

EWTh-2 ...

red

+2% Ceria

EWCe-2...

orange

+1.5% Lanthana

EWLa-1 ...

black

+0.15 to 0.40% Zirconia

...EWZr

brown

Ceriated Tungsten is now widely accepted as a substitute for 2% Thoriated Tungsten in AC and DC applications.

SQUARE WAVE TIG 175

MAY96