Miller Electric OM-227 398D User Manual

OM-227 398D

2007−12

Processes

MIG (GMAW) Welding

Description

Semi-Automatic, Air/Water­Cooled, MIG (GMAW) Welding
Gun

™

XR - Aluma-Pro

(Air And Water-Cooled Guns)

Visit our website at

www.MillerWelds.com

300 Ampere (Air) Push-Pull Welding Gun

400 Ampere (Water) Push-Pull Welding Gun

File: MIG (GMAW)

From Miller to You

Thank you and congratulations on choosing Miller. Now you can get
the job done and get it done right. We know you don’t have time to do
it any other way.

That’s why when Niels Miller first started building arc welders in 1929,
he made sure his products offered long-lasting value and superior
quality. Like you, his customers couldn’t afford anything less. Miller
products had to be more than the best they could be. They had to be the
best you could buy.

Today, the people that build and sell Miller products continue the
tradition. They’re just as committed to providing equipment and service
that meets the high standards of quality and value established in 1929.

This Owner’s Manual is designed to help you get the most out of your
Miller products. Please take time to read the Safety precautions. They
will help you protect yourself against potential hazards on the worksite.

We’ve made installation and operation quick
and easy. With Miller you can count on years
of reliable service with proper maintenance.
And if for some reason the unit needs repair,
there’s a Troubleshooting section that will
help you figure out what the problem is. The

Miller is the first welding
equipment manufacturer in
the U.S.A. to be registered to
the ISO 9001:2000 Quality
System Standard.

parts list will then help you to decide the
exact part you may need to fix the problem.
Warranty and service information for your
particular model are also provided.

Working as hard as you do

− every power source from
Miller is backed by the most
hassle-free warranty in the
business.

Miller Electric manufactures a full line
of welders and welding related equipment.
For information on other quality Miller
products, contact your local Miller distributor to receive the latest full
line catalog or individual specification sheets. To locate your nearest

distributor or service agency call 1-800-4-A-Miller, or visit us at
www.MillerWelds.com on the web.

Mil_Thank 4/05

TABLE OF CONTENTS

SECTION 1 −SAFETY PRECAUTIONS FOR GMAW WELDING GUNS − READ BEFORE USING 1 . . . . . . . .

1-1. Symbol Usage 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2. Arc Welding Hazards 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-3. EMF Information 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 2 − DEFINITIONS 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1. Warning Label Definitions 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2. Manufacturer’s Rating Label For CE Products Only 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3. WEEE Label (For Products Sold Within The EU) 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-4. Symbols And Definitions 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 3 − INTRODUCTION 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1. Specifications 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2. Duty Cycle And Overheating 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 4 − INSTALLATION 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-1. Connections With A Constant Current (CC), Constant Voltage (CV) Or Constant Current/Constant

Voltage (CC/CV) Welding Power Source Having A 14-Socket Receptacle 6 . . . . . . . . . . . . . . . . . . . . . .

4-2. XR-Water-Cooled Gun Connections 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-3. Millermatic 350P Water Cooled Gun Connections 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-4. Threading Welding Wire For Aluma-Pro Gun And Millermatic 350P 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-5. Threading Welding Wire Through XR-Control Feeder 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-6. Adjusting Tension At Feeder 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-7. 10-Pin Plug Information 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-8. Opening Top Cover Of XR-Aluma-Pro Gun 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-9. Threading Welding Wire Through Gun 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 5 − OPERATION 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-1. Gun Controls 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-2. Gun Pressure Roll Tension Setting 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-3. Shielding Gas 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-4. Coolant Supply For Water-Cooled Models Only 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-5. Gun Drive Assembly Maintenance For An XR-Aluma-Pro Gun 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-6. Replacing Head Tube Liner In XR-Aluma-Pro Guns 16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-7. Changing Gun Contact Tip 16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-8. Replacing The Gun Liner On XR-Aluma-Pro Guns 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 6 − MAINTENANCE & TROUBLESHOOTING 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-1. Routine Maintenance For Aluminum Push/Pull Guns 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-2. Cleaning The Gun Liner On XR-Aluma-Pro Guns 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-3. Troubleshooting Table 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 7 − ELECTRICAL DIAGRAMS 21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 8 − PARTS LIST 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 9 − PARTS LIST INCLUDING CONSUMABLES 27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OPTIONS AND ACCESSORIES
WARRANTY

Declaration of Conformity for

European Community (CE) Products

NOTE

Manufacturer: European Contact:

Miller Electric Mg. Co. Mr. Danilo Fedolfi,
1635 W. Spencer St. Managing Director
Appleton, WI 54914 USA ITW Welding Products Italy S.r.l.
Phone: [phone] Via Privata Iseo 6/E

European Contact Signature:

Declares that the product: XR - Aluma-Pro

This information is provided for units with CE certification (see rating label on unit).

20098 San Giuliano
Milanese, Italy
Phone: [phone]
Fax: [phone]

conforms to the following Directives and Standards:

Directives

Low Voltage Directive: 73/23/EEC

Electromagnetic Compatibility (EMC) Directive: 89/336/EEC

Standards

Arc Welding Equipment − Part 5: Wire Feeders. IEC 60974-5 Ed. 1

Arc Welding Equipment − Part 10: Electromagnetic Compatibility (EMC) Requirements. IEC 60974-10 August 2002

Arc Welding Equipment − Part 1: Welding Power Sources. IEC 60974-1 Ed. 2.1

Degrees Of Protection Provided By Enclosure (IP Code) IEC 60529 Ed. 2.1

Insulation Coordination For Equipment Within Low-Voltage Systems −

Part 1: Principles, Requirements and Tests: IEC 60664-1 Ed. 1.1

Arc Welding Equipment − Part 7: Torches. IC 60974-7 Ed.1

The product technical file is maintained by the responsible Business Unit(s) located at the manufacturing facility.

dec_wire_6/05

SECTION 1 −SAFETY PRECAUTIONS FOR GMAW

WELDING GUNS − READ BEFORE USING

Protect yourself and others from injury — read and follow these precautions.

1-1. Symbol Usage

SR7_2007−04

DANGER! − Indicates a hazardous situation which, if
not avoided, will result in death or serious injury. The
possible hazards are shown in the adjoining symbols
or explained in the text.

Indicates a hazardous situation which, if not avoided,
could result in death or serious injury. The possible
hazards are shown in the adjoining symbols or ex­plained in the text.

NOTICE − Indicates statements not related to personal injury.

1-2. Arc Welding Hazards

The symbols shown below are used throughout this manual
to call attention to and identify possible hazards. When you
see the symbol, watch out, and follow the related instructions
to avoid the hazard. The safety information given below is
only a summary of the more complete safety information
found in the welding power source Owner’s Manual. Read
and follow all Safety Standards.

Only qualified persons should install, operate, maintain, and
repair this unit.

During operation, keep everybody, especially children, away.

ELECTRIC SHOCK can kill.

D Always wear dry insulating gloves.
D Insulate yourself from work and ground.
D Do not touch live electrode or electrical parts.

D Repair or replace worn, damaged, or cracked gun or cable insula-

tion.

D Turn off welding power source before changing contact tip or gun

parts.

D Keep all covers and handle securely in place.

. Indicates special instructions.

This group of symbols means Warning! Watch Out! ELECTRIC
SHOCK, MOVING PARTS, and HOT PARTS hazards. Consult sym­bols and related instructions below for necessary actions to avoid the
hazards.

BUILDUP OF GAS can injure or kill.

D Shut off shielding gas supply when not in use.
D Always ventilate confined spaces or use ap-

proved air-supplied respirator.

ARC RAYS can burn eyes and skin.

D Wear welding helmet with correct shade of fil-

ter.

D Wear correct eye and body protection.
D Cover exposed skin with spatter-resistant

clothing.

HOT PARTS can cause severe burns.

D Allow gun to cool before touching.
D Do not touch hot metal.
D Protect hot metal from contact by others.

NOISE can damage hearing.

FUMES AND GASES can be hazardous.

D Keep your head out of the fumes.
D Ventilate area, or use breathing device.
D Read Material Safety Data Sheets (MSDSs)

and manufacturer’s instructions for material
used.

WELDING can cause fire or explosion.

D Do not weld near flammable material.
D Do not weld on closed containers.
D Watch for fire; keep extinguisher nearby.

Noise from some processes or equipment can
damage hearing.

D Check for noise level limits exceeding those

specified by OSHA.

D Use approved ear plugs or ear muffs if noise level is high.
D Warn others nearby about noise hazard.

WELDING WIRE can cause injury.

D Keep hands and body away from gun tip when

trigger is pressed.

OM-227 398 Page 1

1-3. EMF Information

Considerations About Welding And The Effects Of Low Frequency
Electric And Magnetic Fields

Welding current, as it flows through welding cables, will cause electro­magnetic fields. There has been and still is some concern about such
fields. However, after examining more than 500 studies spanning 17
years of research, a special blue ribbon committee of the National
Research Council concluded that: “The body of evidence, in the
committee’s judgment, has not demonstrated that exposure to power­frequency electric and magnetic fields is a human-health hazard.”
However, studies are still going forth and evidence continues to be
examined. Until the final conclusions of the research are reached, you
may wish to minimize your exposure to electromagnetic fields when
welding or cutting.

To reduce magnetic fields in the workplace, use the following
procedures:

1. Keep cables close together by twisting or taping them, or using a
cable cover.

2. Arrange cables to one side and away from the operator.

3. Do not coil or drape cables around your body.

4. Keep welding power source and cables as far away from
operator as practical.

5. Connect work clamp to workpiece as close to the weld as
possible.

About Implanted Medical Devices:

Implanted Medical Device wearers should consult their doctor and the
device manufacturer before performing or going near arc welding, spot
welding, gouging, plasma arc cutting, or induction heating operations.
If cleared by your doctor, then following the above procedures is recom­mended.

OM-227 398 Page 2

SECTION 2 − DEFINITIONS

2-1. Warning Label Definitions

ABC

1 1.1 1.2 1.3

2

3 3.1 3.2 3.3

4 4.1

2.1

2.2

+

56

+

+

2.3

+

S-178 936

A. Warning! Watch Out! There

are possible hazards as

shown by the symbols.
B. Drive rolls can injure fingers.
C. Welding wire and drive parts

are at welding voltage during

operation − keep hands and

metal objects clear.
1 Electric shock can kill.

1.1 Wear dry insulating gloves.

Do not touch electrode with

bare hand. Do not wear wet or

damaged gloves.

1.2 Protect yourself from electric

shock by insulating yourself

from work and ground.

1.3 Disconnect input plug or

power before working on

machine.
2 Breathing welding fumes can

be hazardous to your health.

2.1 Keep your head out of the

fumes.

2.2 Use forced ventilation or local

exhaust to remove the fumes.

2.3 Use ventilating fan to remove

fumes.
3 Welding sparks can cause

explosion or fire.

3.1 Keep flammables away from

welding. Don’t weld near

flammables.

3.2 Welding sparks can cause

fires. Have a fire extinguisher

nearby and have a watch

person ready to use it.

3.3 Do not weld on drums or any

closed containers.
4 Arc rays can burn eyes and

injure skin.

4.1 Wear hat and safety glasses.

Use ear protection and button

shirt collar. Use welding

helmet with correct shade of

filter. Wear complete body

protection.
5 Become trained and read the

instructions before working on

the machine or welding.
6 Do not remove or paint over

(cover) the label.

OM-227 398 Page 3

2-2. Manufacturer’s Rating Label For CE Products Only

2-3. WEEE Label (For Products Sold Within The EU)

229 109-A

Do not discard product (where ap­plicable) with general waste.

Reuse or recycle Waste Electrical
and Electronic Equipment (WEEE)
by disposing at a designated collec­tion facility.

Contact your local recycling office
or your local distributor for further
information.

2-4. Symbols And Definitions

. Some symbols are found only on CE products.

A

IP

I

1

Amperes

Degree Of
Protection

Jog Output Trigger Gun

Press To Set Increase Trigger Hold On Trigger Hold Off

Purge Spot Weld Time Percent Run-In

Burnback Time

Primary Current

Water (Coolant)

Output

V

Hz

U

1

I

2

Volts Alternating Current

Hertz Circuit Breaker Wire Feed

Primary Voltage

Rated Current Line Connection

Fuse

U

2

Load Voltage Read Instructions

Continuous

Spot Welding

X

Water (Coolant) In-

Duty Cycle

put

OM-227 398 Page 4

3-1. Specifications

SECTION 3 − INTRODUCTION

Model Welding Output Range Electrode

Wire Diameter
Capacity

XR-Aluma-Pro Gun
(Air Cooled)

XR-Aluma-Pro Gun
(Water Cooled)

300 A at 100% Duty Cycle
with 15, 25 or 35 ft
(4.6 or 7.6 m) gun

400 A at 100% Duty Cycle
with 15, 25 or 35 ft
(4.6 or 7.6 m) gun

.030 To 1/16 in
(0.8 To 1.6 mm)
aluminum wire

.030 To 1/16 in
(0.8 To 1.6 mm)
aluminum wire

. When changing 1/16 in (1.6 mm) wire, kit 230708 must be installed.

3-2. Duty Cycle And Overheating

Air-Cooled Models

100% Duty Cycle At 300 Peak Amperage Using 100% Argon Gas w/15, 25 Or 35 Foot Guns

Wire Feed
Speed Range

70 To 900 ipm
(1.8 To 23 mpm)

70 To 900 ipm
(1.8 To 23 mpm)

Duty Cycle is percentage of 10 min­utes that unit can weld at rated load
without overheating.

NOTICE − Exceeding duty cycle
can damage unit and void warranty.

Net Weight

(Torch Only)

2.5 lb (1.1 kg)
(less cables)

2.9 lb (1.3 kg)
(less cables)

Continuous Welding

Water-Cooled Models

100% Duty Cycle At 400 Peak Amperage Using 100% Argon Gas w/15, 25 Or 35 Foot Guns

Continuous Welding

sduty1 5/95

OM-227 398 Page 5

SECTION 4 − INSTALLATION

. Be sure that contact tip, liner, and drive rolls are correct for wire size and type. See Parts List to change parts as needed.

4-1. Connections With A Constant Current (CC), Constant Voltage (CV) Or Constant

Current/Constant Voltage (CC/CV) Welding Power Source Having A 14-Socket Re­ceptacle

1 CC, CV Or CC/CV Welding

Power Source

2 24 VAC/Contactor Control

14-Pin Plug

3 Workpiece

1

2

8

4 Voltage Sensing Lead

(Optional)

Connect lead to workpiece for CC
welding only.

5 Gun
6 Wire Feeder
7 24 VAC/Contactor Control

Cord

! Do not use gas pressure

above 50 psi (345 kPa).

8 Gas Cylinder

3

8

6

7

4

5

XR Control

1

5

OM-227 398 Page 6

Millermatic 350P

804 542-B / 804 653-A

4-2. XR-Water-Cooled Gun Connections

7

8

Left Side

. Turn on coolant supply before

welding or gun will be dam­aged.

1 Gun Control Cable
Insert plug into Gun Control

receptacle, and tighten threaded
collar.

2 Gun Connector
3 Gun Securing Knob

3

2

4

4 Gun Connector Block
Loosen gun securing knob, and

insert gun connector through Wire
opening until it bottoms against
block. Tighten knob. Close and
latch door.

5 Gun (Coolant) “In” Hose
Connect to Water “In” fitting on

feeder (left-hand threads).
6 Gun (Coolant) “Out” Hose
Connect to Water “Out” fitting on

feeder (left-hand threads)
7 Water (Coolant) Output
8 Water (Coolant) Input
9 XR Control (Coolant) Output
10 XR Control (Coolant) Input
Close and latch door.

Tools Needed:

9/16 in

9

10

6

1

5

Ref. 801 577-A / 805 106-A

OM-227 398 Page 7