03 gas metal arc welding (gmaw), 04 flux cored arc welding (fcaw), 05 shutdown procedures – Tweco FP-165 Mini MIG User Manual

Page 35: Gas metal arc welding (gmaw) -4, Flux cored arc welding (fcaw) -4, Shutdown procedures -4

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FIREpOwER Fp-125, 135, 165


Manual 0-5123



4.03 Gas Metal Arc Welding (GMAW)

See Welding Guidelines included in this manual.
Make all necessary connections as instructed in the IN-

Place the WELD VOLTAGE RANGE SWITCH at the desired




clockwise past position 4, as damage to the switch

may occur.

Plug the supply cord into a 120 VAC 40 Ampere recep-

tacle for the FP-125, 120 VAC 50 Ampere receptacle for

the 135 and into a 230 VAC 30 Ampere receptacle for the

Open the gas cylinder valve to supply shielding gas to the

gun. (optional gas regulator required on the FP-125)
Connect the WORK CLAMP to the workpiece (material

to be welded).
Rotate the WIRE SPEED control to the desired setting.
Extend wire from the gun, and cut to proper stick-out

for that type of wire (when welding always maintain this

Position gun to where it is at approximately right angles

to the workpiece with proper wire stick-out. Lower your

welding helmet and pull the gun trigger switch.



Be sure to put on proper protective clothing and eye safe-

guards (welding coat, apron, gloves, and welding helmet

with proper lenses installed). See Safety Instructions and

Warnings chapter included in this manual. Neglect of

these precautions may result in personal injury.

Travel at a speed necessary to maintain a bead width from

1/8" to ¼" (3mm to 6mm) depending on the thickness of

the material. For material that may require larger weld-

ments, either change to a larger diameter filler wire or use

multi pass beads. On some applications, it may be neces-

sary to adjust the voltage range to stabilize the arc.
Upon completion of the weld, release the gun trigger

switch, raise the welding helmet, and visually examine

the weld.


To help you overcome any problems that might arise,

you will find useful information in section 4.06 Basic

Welding Techniques.

4.04 Flux Cored Arc Welding (FCAW)

Follow the same general procedure as with the GMAW pro-

cess above. Shielding gas is not required for self shielded

type wires. For differences in the process see section 4.06

Basic Welding Techniques. Also included is information to

solve any problem related to the FCAW process.

4.05 Shutdown Procedures

Close the cylinder valve (GMAW process only). Press gun

switch to vent gas line (GMAW process only). Place the

POWER ON/OFF SWITCH in the OFF position.



After releasing the gun switch, the electrode wire will

remain electrically “hot” for several seconds.

This manual is related to the following products: