Miller AlumaPower 350 MPa Auto-Line CE Manuale d'uso - Pagina 34

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7-4. Pulsed MIG Welding Mode - GMAW-P Process

Weld

terminals

are

through the remote control in

Pulsed MIG welding mode.

Volts Indicator

Arc Length Indicator

Left Display

Right Display

Adjust Control

Process Indicator

Arc Control Indicator

Setup Button

Wire/Gas Indicator

Setup

For typical system connections refer to

Section 7-1.

Press Setup Button twice. The Process In-

dicator will be lit. Rotate Adjust Control to

select PULS.

Press the Setup Button until the Wire/Gas

Indicator is lit. The active wire type will ap-

pear in the Left and Right Display.

Rotate Adjust Control to select desired

wire.

Press the Setup Button again. Wire/Gas In-

dicator is lit. The active gas type will appear

in the Left and Right Display.

Rotate Adjust Control to select desired gas.

Press the Setup Button again to confirm the

selection. The unit will acknowledge a

change of wire and gas information by dis-

playing PROG LOAD momentarily.

For best results, select the appropriate

Wire and Gas Type to match the actual

OM-245 182 Page 30

5.0

wire and gas being used. Refer to

energized

Pulsed MIG − Wire and Gas Selection

Table for available wires and gases

(see Section 7-5).

Operation

While the Arc Length Indicator is lit under

the Left Display, the Adjust Control is used

to set desired trim setting.

The arc length will be adjusted remote-

ly at the wire feeder if the feeder has a

voltage control. This voltage control

will override the Adjust Control of arc

length on the welding power source.

Arc Control (SharpArc)

Press the Setup Button until the Arc Control

Indicator is lit. SHRP appears on the Left

Display, and the corresponding SharpArc

setting appears on the Right Display.

Rotate Adjust Control to select desired

SharpArc setting from 0 to 50, default is 25.

Adjusting the SharpArc setting changes the

welding arc cone. Lower settings widen the

arc cone, increases puddle fluidity and flat-

tens the weld bead appearance.

Higher settings narrow the arc cone, re-

duces puddle fluidity and crowns the weld

bead appearance.

Each Wire and Gas Type combination

has independent Arc Length and Shar-

pArc settings. These settings are pre-

served when the unit is turned off.

Arc Length - Pulsed MIG Manual Control

(see Section 6-2)

Arc length corresponds to the level of ener-

gy needed to burn off the welding electrode.

As wire feed speed increases, a higher arc

length setting is required to burn off the

additional wire. The arc length setting ap-

pears in the Left Display when the Arc

Length Indicator is lit. Arc length can be ad-

justed from 0 to 100.

After the welding output terminals are ener-

gized, but prior to arc initiation, the unit dis-

plays the letter "R" and a reference wire

speed (IPM) on the Right Display. The ref-

erence wire speed can be used as a start-

ing point for the wire speed setting at the

feeder. The wire speed and arc length set-

ting can then be further adjusted to achieve

the desired arc length.

The Configuration Option Menu (see Sec-

tion 6-2) can be used to change the arc

length setting (0 to 100) to average arc volt-

age. Average arc voltage can be used as an

alternative method to set the Pulsed MIG

welding arc with the same parameters

(voltage and wire speed) as a conventional

MIG arc. Lower voltage settings corre-

spond to tighter arc lengths while higher

voltage settings correspond to longer arc

lengths. If the voltage mode is selected, the

average voltage preset will be displayed on

the Left Display with the Volts Indicator lit.

Arc Length - Pulsed MIG Auto Control

(see Section 6-2)

In Auto operation the arc length setting is

0-100. The programs have been developed

at 50 arc length setting. Increasing or de-

creasing the arc length setting from 50 will

change the arc length. It is not necessary to

change the arc length value when changing

wire feed speed settings.

Ref. 245 172-A