ESAB MultiPower 460 Pulse Manual de instrucciones descargar pdf (Pagina 32)

SECTION 4

OPERATION

Step 6. Set the shielding gas flow rate to 35 cfh by activating the gas purge

switch on the wire feeder or pulling the gun trigger and turning the

adjustment knob on the Flowmeter

Step 7 Set the voltage knob on the wire feeder to the "5" or center 12 o'clock

position.

Step 8. Connect the work cable to the workpiece and pull the gun trigger to

start welding.

Step 9 The voltage knob on the wire feeder becomes the ARC TRIM and is

used to fine tune the arc length for best arc performance. Turn the

knob clockwise to increase the arc length or counterclockwise to de-

crease the arc. Trim the wire speed and volts as needed for the de-

sired arc characteristics and weld quality.

1. PULSE PROCESS CONTROL

a. Use a tip-to-work distance (TTW) of 3/8" to 5/8". This refers to the

distance between the end of the Mig gun contact tip and the workpiece

or weld puddle. The tip-to-work distance can also be used to adjust the

stability of the arc. Changes in distance wil cause the arc to shorten or

lengthen as desired for best results. Excessive tip to work movement

can cause arc instability. Maintaining a constant TTW will insure the

best arc stability and consistency.

b. For the best arc stability, keep the arc on the front edge of the molten

puddle and use a 5 to 10 degree gun angle from the vertical.

c. If the arc is "crackling" or if spatter is excessive lengthen the arc by

adjusting the TRIM knob . If the arc is "fluttering" or difficult to control

then shorten the arc length.

2. PULSE MIG ARC STABILITY

Many variables can affect the arc stability of pulse MIG welding. Some

examples are:

Differences in shielding gas compositions

Differences in weld wire chemistry

Water vs. air cooled guns

Base metal surface condition

Tip-to work distance

Variations on wire feed speed

Wire feedability

Long welding cables

High resistance cables and connections

When adverse conditions are present, the pulse arc stability is sometimes less

than desirable. The arc will "crackle" and produce higher than normal spatter

levels. This occurs when high resistances in the welding circuit cause changes

pulse waveform and average current levels. The TRIM knob adjusts the pulse

frequency to accommodate small changes in the welding equipment set-up and

base material variations to achieve a stable pulse welding condition. Mechani-

cal wire feed inconsistencies will also affect pulse arc stability.

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 51 52

Comentarios a estos manuales

Sin comentarios

ESAB MultiPower 460 Pulse Manual de instrucciones Pagina 32

Comentarios a estos manuales

Relacionado con productos y manuales para Sistema De Soldadura ESAB MultiPower 460 Pulse