Tig Welding, “Gtaw” With Lift Start; Setting Up Equipment For Tig Welding, “Gtaw” With No Foot Control; Close The Gas Valve On The Torch Handle; Starting The Arc With Lift Start - Forney 140 MP Owner's Manual

TIG Welding, "GTAW" with Lift Start
Setting up the Equipment for TIG Welding, "GTAW" with NO Foot Control:
• Select the TIG function on the control panel with knob (6).
• Choose LOCAL with switch (20).
• Connect the TIG torch cable to the negative Dinse socket (9) of the welder.
• Connect the ground cable connector to the positive Dinse socket (10) of the welder.
• Connect the TIG torch control cable to the 7 pin connector (12).
• Connect the TIG torch gas line to the gas regulator, ARGON GAS ONLY
The gas flow is manually controlled with the knob on the TIG torch. Use inert gas
(argon ) only.
Setting up the Equipment for TIG Welding, "GTAW using a Foot Control:
• Switch the unit on thru the ON/OFF switch (14).
• Select the TIG function on the control panel with knob (6).
• Choose REMOTE with switch (20).
• Connect the TIG torch cable to the negative Dinse socket (9) of the welder.
• Connect the ground cable connector to the positive Dinse socket (10) of the welder.
• Connect the Foot Control cable to the 7 pin connector (12)
• Connect the TIG torch gas line to the gas regulator ARGON GAS ONLY.

Close the Gas Valve on the Torch Handle:

Turn on gas at the gas regulator, then open the valve on the torch handle and check
for gas flow.

Starting the Arc with Lift Start:

• Fix the tungsten electrode so that it protrudes approximately ¼ inch from the torch nozzle.
• Position the torch so that the tungsten electrode is in contact with the work piece at a 45
degree angle.
• Press the torch trigger or the foot control and then lift the tungsten electrode away from the
work piece.
REMEMBER to turn OFF the gas immediately after you finish welding.
MATERIAL
GAS
(Wire)
Regulation Knob
Solid Wire
Mild Steel
100% Argon
18
140 MP TIG SET-UP CHART
TUNGSTEN
22 Gauge
ELECTRODE
.0315" (.8 mm)
ø
Left Knob
Stainless
Mild Steel
.040" (1.0 mm) 35-50
1/16" (1.6 mm) -
WWW.FORNEYIND.COM
MATERIAL THICKNESS
18 Gauge
.0236" (1.2 mm)
Left Knob
Stainless
Mild Steel
Steel Steel
20-35 45-60 30-55
- - -
16 Gauge 1/8" (3 mm)
1/16" (1.6 mm)
Left Knob
Stainless
Mild Steel Mild Steel
Steel
- - -
60-90 40-70 80-100
Left Knob
Stainless
Steel
-
65-100