03 flux cored arc welding (fcaw), 04 shutdown procedures, 05 basic welding technique – Tweco FP-95 Mini MIG User Manual

Page 30: Flux cored arc welding (fcaw) -4, Shutdown procedures -4, Basic welding technique -4, Firepower fp-95 operation

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Manual 0-5122



4.03 Flux Cored Arc Welding (FCAW)

See Welding Guidelines included in this manual.

1. Make all necessary connections as instructed in

the INSTALLATION chapter.


at the desired setting.

3. Rotate the WIRE SPEED FEED control to the de-

sired setting.

4. Plug the supply cord into a 120 VAC 20 Ampere


5. Connect the WORK CLAMP to the workpiece

(material to be welded).

6. Extend wire from the gun, and cut to proper stick-

out for that type of wire (when welding always

maintain this distance).

7. 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 4.05 Basic

Welding Techniques.

4.04 Shutdown Procedures

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.

4.05 Basic Welding Technique


Two different welding processes are covered in this

section, with the intention of providing the very basic

concepts in using the semi-automatic mode of welding.

In this mode, the welding gun is hand-held. The electrode

(welding wire) is then fed into a weld puddle and the arc

is shielded by a gas or gas mixture.
Setting of the power Supply

The settings of the FP 95 requires some practice by the

operator in that the welding Power Supply has two control

settings that need to balance. These are the Wire Speed

control and the Voltage Control switches. The welding

current is determined by the Wire Speed control (i.e., the

current will increase with increased wire speed, resulting

in a shorter arc). Slower wire speed will reduce the cur-

rent and lengthen the arc. Increasing the welding voltage

hardly alters the welding current level, but lengthens the

arc. By decreasing the voltage, a shorter arc is obtained

with little change in welding current.
When changing to a different electrode wire diameter,

different control settings are required. A thinner electrode

wire needs more wire speed to achieve the same current

A satisfactory weld cannot be obtained if the wire speed

and voltage switch settings are not adjusted to suit the

electrode wire diameter and dimensions of the work

If the wire speed is too high for the welding voltage,

“stubbing” will occur as the wire dips into the molten pool

and does not melt. Welding in these conditions normally

produces a poor weld due to lack of fusion. If however,

the welding voltage is too high, large drops will form on

the end of the electrode wire, causing spatter. The cor-

rect setting of voltage and wire speed can be seen in the

shape of the weld deposit and heard by a smooth regular

arc sound.