Miller Electric 350MPa User Manual

Invision™350 MPa System

MIG Welding

Power Source

Issued Nov. 2007 • Index No. DC/23.5

Lightweight, aerospace-grade aluminum
case offers protection with the benefit of

reduced weight.

SharpArc

™

technology changes welding arc

characteristics in Pulsed MIG welding mode.

Auto-Line

™

Power Management
Technology allows for any input voltage
hook-up (208 – 575 V) with no manual
linking required, providing convenience
in any job setting. Ideal solution for dirty
or unreliable input power.

Easy setup for MIG and Pulsed MIG
applications.

Inverter arc control technology provides
greater puddle control for outstanding MIG
weld performance.

Fan-On-Demand

™

cooling system
operates only when needed, reducing
noise, energy use and the amount of
contaminants pulled through machine.

The Power of Blue®.

Dynamic Pulsed MIG — highly-engineered
pulse programs default to give a tight
productive pulse arc. The operator can
fine tune the arc if desired.

Processes

Invision 350 MPa

MIG (GMAW)/Pulsed MIG (GMAW-P)

Flux Cored (FCAW)
Air Carbon Arc Cutting and Gouging
(CAC-A) (1/4 in carbons max.)

S-74 MPa

MIG (GMAW)

Flux Cored (FCAW)
Pulsed MIG (GMAW-P)

Invision 350 MPa

Input Power

Requires 3- or 1-Phase Power, 50/60 Hz

Rated Output 10 – 38 V, 5 – 425 A
Weight

Net: 80 lb (36.3 kg) Ship: 89.1 lb (40.4 kg)

S-74 MPa

Input Power

24 VAC, 10 A, 50/60 Hz

Electrode Wire Dia. Capacity

.023 –5/64 in (0.6 –2

mm)

Wire Speed 50–780 IPM (1.3–19.8 m/min)
Weight Net: 58 lb (26 kg)

Heavy Industrial Applications

Invision 350 MPa

Railroad

Truck/Trailer Manufacturing

Light Gauge and Tube

Lawn and Garden Equipment

Recreational Vehicles

S-74 MPa

Heavy/Light Manufacturing

Metal Fabrication

Miller Electric Mfg. Co.

An Illinois Tool Works Company
1635 West Spencer Street
Appleton, WI 54914 USA

Web Site

www.MillerWelds.com

International Headquarters

Phone: [phone]
USA FAX: [phone]
Canadian FAX: [phone]
International FAX: [phone]

Power source is warranted for 3 years, parts and labor.

Original main power rectified parts are warranted for 5 years.

Gun warranted for 90 days, parts and labor.

Quick
Specs

Line voltage compensation keeps welding
output constant even if input power varies
by +/-10%. XMT 350 models further expand
line voltage compensation on 460 VAC to
an amazing +37%, -59%.

Large, dual digital meters are easy to
view and are presettable to ease setting
weld output.

Invision 350 MPa System

Add the new S-74 MPa feeder for a
package that gives you the benefit of
Synergic-Pulsed MIG. As you increase/
decrease the wire feed speed, the pulse
parameters increase/decrease matching
the right amount of power output to
the wire speed.

2

Certified to both the Canadian and U.S. Standards for welding equipment.

Performance Data

Input
Power

Three­Phase

Single­Phase

Rated Out put
at 60%
Duty Cycle

350 A at
34 VDC

300 A at
32 VDC

Amperage
Range in
CC Mode

5–425 A

5–425 A

Voltage
Range in
CV Mode

10–38 V

10–38 V

Max. Open­Circuit
Voltage

75 VDC

75 VDC

Amps Input at Rated Load Output, 60 Hz,
208 V 230 V 400 V 460 V 575 V KVA KW

40.4 36.1 20.6 17.8 14.1 14.2 13.6

60.8 54.6 29.7 24.5 19.9 11.7 11.2

Weight

80 lb
(36.3 kg)

Dimensions

H: 17 in (432 mm)
W: 12-1/2 in (318 mm)
D: 24 in (610 mm)

Specifications (Subject to change without notice.)

Additional Features

Exceptional electrical efficiency. At 400 A,
efficiency is 87.24%!

350 A of welding output at 60% duty cycle
with superior low-end performance.

Power factor of .95 enables smaller

fuses/breakers and primary wiring. Primary
amperage draw at rated output is 25% less
than the competition.

Ultra-tough, polycarbonate-blended cover
for control panel protects front controls

from damage.

DUTY CYCLE CHART

500

425
400

3-PHASE OPERATION

350

300

1-PHASE OPERATION

250

200

WELDING AMPERES

150

100

10 15 20 25

6 AWG POWER CORD

8 AWG POWER CORD

30

DUTY CYCLE

100

90

80

70

60

50

VOLTAGE

40

30

20

10

0

10040 50 60 70 9080

0 100 200 300 400 500

CV VOLT/AMP CURVE

MAX

MIN

AMPS

3

1. Output ON Indicator Light

2. Left Display

3. Voltage Indicator

4. Arc Length Indicator

5. Wire Feeder Receptacle

6. Adjustment Control

7. Right Display

8. Setup Indicator

9. Amperage Indicator

10. Setup Indicator Lights

• Arc Control Indicator

• Process Indicator

• Wire/Gas Type Indicator

• Setup Button

Control Panel

Additional Features

SharpArc

™

Changes welding arc characteristics in
Pulsed MIG (GMAW-P) welding mode.

If a gas is used other than what is listed
on the Pulsed MIG welding program
chart (below left), the SharpArc

™

can be
adjusted to help customize your arc to the
gas being used.

Lower SharpArc

™

settings widen the arc
cone, increase puddle fluidity and flattens
the weld bead.

Auto Remote Sense

™

Enables unit to automatically use remote
control if connected to remote control
receptacle.

Dinse International-style weld disconnects

Provide high-quality weld cable connections.
Dinse and Tweco connectors are available.
When Dinse connectors are specified, two
connectors are supplied with the unit.

Optional 115 VAC auxiliary power

Provides 10 amps of circuit-breaker­protected power for water circulators, etc.

MPa

MPa: M (MIG), P (Pulse), a (Advanced
Arc Control). Advanced arc control

enables an improved pulse welding arc.
The operator has more control over puddle
and bead characteristics using SharpArc

™

.
In addition, the unit provides a more robust
and stable arc at very low arc length, reducing
heat input, and providing the ability to weld
on a wider range of material thickness.

Synergic pulsing is available only with the
S-74 MPa dedicated wire feeder.

What are some benefits of
Synergic-Pulsed MIG?

1. Easier to set up

2. No more changing wire speed, and

then having to go back to reset the
welding output.

The Invision 350 MPa has built-in dynamic Pulsed MIG capabilities. See the table below for the wide
range of Pulsed MIG (GMAW-P) welding applications the Invision 350 MPa can handle.

The Invision™350 MPa and S-74 MPa combine for a synergic system that simplifies and
improves MIG and Pulsed MIG welding applications for industrial manufacturing.

(0 setting) (50 setting)

Low Setting High Setting

Note: Setting has a subtle effect on arc that is
exaggerated in graphic for visual emphasis.

Steel

Metal Core

Stainless Steel

Aluminum

Nickel

Silicon Bronze
Copper Nickel

.035 STL
.045 STL

.035 MCOR
.045 MCOR
.052 MCOR

.035 SSTL
.045 SSTL

.035 AL4X (4000 Series)
3/64 AL4X (4000 Series)
.035 AL4X (5000 Series)
3/64 AL4X (5000 Series)

.035 NI
.045 NI

.035 SIBR
.045 CUNI

Gas Types

ARGN CO2(Argon/Carbon Dioxide)
ARGN OXY (Argon/Oxygen)

ARGN CO

2

(Argon/Carbon Dioxide)

TRI MIX (Tri-gas mixture)
ARGN OXY (Argon/Oxygen)
ARGN CO

2

(Argon/Carbon Dioxide)

ARGN (Argon)

ARGN HE (Argon/Helium)

ARGN (Argon)
HE ARGN (Helium/Argon)

Built-In Pulsed MIG Programs

Wire Types

1

OUTPUT ON

2
3
4

5

Setup

Arc Control

Process

Wire/Gas

SETUP

6

7
8

9

10