Miller Millermatic 185 Owner's manual

Brand: Miller

Model: Millermatic 185

Category: Welding System

Type: Owner's manual

This manual is also suitable for

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Millermatic 185

And M-15 Gun

Processes

Description

MIG (GMAW) Welding

Flux Cored (FCAW) Welding

Arc Welding Power Source

And Wire Feeder

OM-1313C April 1997

Eff. w/Serial Number KH376829

Miller offers a Technical

Manual which provides

more detailed service and

parts information for your

unit. To obtain a Technical

Manual, contact your local

distributor. Your distributor

can also supply you with

Welding Process Manuals

such as SMAW, GTAW,

GMAW, and GMAW-P.

For practical information on

welding, process applica-

tions, and Miller products,

visit our website at

www.millerwelds.com

Call

1-800-4-A-MILLER

for your local

Miller distributor.

Your distributor gives

you ...

Service

You always get the fast,

reliable response you

need. Most replacement

parts can be in your

hands in 24 hours.

Support

Need fast answers to the

tough welding questions?

Contact your distributor.

The expertise of the

distributor and Miller is

there to help you, every

step of the way.

The following terms are

used interchangeably

throughout this manual:

MIG = GMAW

TABLE OF CONTENTS

SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING 1. . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

1-3. Additional Symbols for Installation, Operation, and Maintenance 3. . . . . . . . . . . . . . . . . . . . . .

1-4. Principal Safety Standards 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-5. EMF Information 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 2 − INSTALLATION 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1. Specifications 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2. Volt-Ampere Curves 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3. Duty Cycle And Overheating 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-4. Installing Work Clamp 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-5. Installing Gas Supply 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-6. Installing Welding Gun 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-7. Setting Gun Polarity 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-8. Installing Wire Spool And Adjusting Hub Tension 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-9. Changing Input Voltage 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-10. Electrical Service Guide 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-11. Selecting A Location And Connecting Input Power 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-12. Threading Welding Wire 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-13. Weld Parameter 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 3 − OPERATION 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1. Front Panel Controls 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 4 − MAINTENANCE & TROUBLESHOOTING 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-1. Routine Maintenance 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-2. Circuit Breakers CB1 And CB2 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-3. Changing Drive Roll And Inlet Wire Guide 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-4. Cleaning Or Replacing Gun Liner 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-5. Replacing Switch And/Or Head Tube 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-6. Replacing Gun Contact Tip 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-7. Unicable Repair 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-8. Troubleshooting 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 5 − ELECTRICAL DIAGRAM 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 6 − MIG WELDING (GMAW) GUIDELINES 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-1. Typical MIG Process Connections 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-2. Typical MIG Process Control Settings 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-3. Holding And Positioning Welding Gun 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-4. Conditions That Affect Weld Bead Shape 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-5. Gun Movement During Welding 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-6. Poor Weld Bead Characteristics 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-7. Good Weld Bead Characteristics 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-8. Troubleshooting − Excessive Spatter 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-9. Troubleshooting − Porosity 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-10. Troubleshooting − Excessive Penetration 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-11. Troubleshooting − Lack Of Penetration 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-12. Troubleshooting − Incomplete Fusion 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-13. Troubleshooting − Burn-Through 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-14. Troubleshooting − Waviness Of Bead 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-15. Troubleshooting − Distortion 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-16. Common MIG Shielding Gases 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 7 − PARTS LIST 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OPTIONS AND ACCESSORIES

WARRANTY

OM-1313C

OM-1313 Page 1

SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING

som _nd_5/97

1-1. Symbol Usage

Means Warning! Watch Out! There are possible hazards

with this procedure! The possible hazards are shown in

the adjoining symbols.

Y Marks a special safety message.

. Means “Note”; not safety related.

This group of symbols means Warning! Watch Out! possible

ELECTRIC SHOCK, MOVING PARTS, and HOT PARTS hazards.

Consult symbols and related instructions below for necessary actions

to avoid the hazards.

1-2. Arc Welding Hazards

Y 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 Safety Standards listed in Section 1-4. Read and follow all

Safety Standards.

Y Only qualified persons should install, operate, maintain, and

repair this unit.

Y During operation, keep everybody, especially children, away.

ELECTRIC SHOCK can kill.

Touching live electrical parts can cause fatal shocks

or severe burns. The electrode and work circuit is

electrically live whenever the output is on. The input

power circuit and machine internal circuits are also

live when power is on. In semiautomatic or automatic wire welding, the

wire, wire reel, drive roll housing, and all metal parts touching the

welding wire are electrically live. Incorrectly installed or improperly

grounded equipment is a hazard.

D Do not touch live electrical parts.

D Wear dry, hole-free insulating gloves and body protection.

D Insulate yourself from work and ground using dry insulating mats

or covers big enough to prevent any physical contact with the work

or ground.

D Do not use AC output in damp areas, if movement is confined, or if

there is a danger of falling.

D Use AC output ONLY if required for the welding process.

D If AC output is required, use remote output control if present on

unit.

D Disconnect input power or stop engine before installing or

servicing this equipment. Lockout/tagout input power according to

OSHA 29 CFR 1910.147 (see Safety Standards).

D Properly install and ground this equipment according to its

Owner’s Manual and national, state, and local codes.

D Always verify the supply ground − check and be sure that input

power cord ground wire is properly connected to ground terminal in

disconnect box or that cord plug is connected to a properly

grounded receptacle outlet.

D When making input connections, attach proper grounding conduc-

tor first − double-check connections.

D Frequently inspect input power cord for damage or bare wiring −

replace cord immediately if damaged − bare wiring can kill.

D Turn off all equipment when not in use.

D Do not use worn, damaged, undersized, or poorly spliced cables.

D Do not drape cables over your body.

D If earth grounding of the workpiece is required, ground it directly

with a separate cable − do not use work clamp or work cable.

D Do not touch electrode if you are in contact with the work, ground,

or another electrode from a different machine.

D Use only well-maintained equipment. Repair or replace damaged

parts at once. Maintain unit according to manual.

D Wear a safety harness if working above floor level.

D Keep all panels and covers securely in place.

D Clamp work cable with good metal-to-metal contact to workpiece

or worktable as near the weld as practical.

D Insulate work clamp when not connected to workpiece to prevent

contact with any metal object.

D Do not connect more than one electrode or work cable to any

single weld output terminal.

SIGNIFICANT DC VOLTAGE exists after removal of

input power on inverters.

D Turn Off inverter, disconnect input power, and discharge input

capacitors according to instructions in Maintenance Section

before touching any parts.

Welding produces fumes and gases. Breathing

these fumes and gases can be hazardous to your

health.

FUMES AND GASES can be hazardous.

D Keep your head out of the fumes. Do not breathe the fumes.

D If inside, ventilate the area and/or use exhaust at the arc to remove

welding fumes and gases.

D If ventilation is poor, use an approved air-supplied respirator.

D Read the Material Safety Data Sheets (MSDSs) and the

manufacturer’s instructions for metals, consumables, coatings,

cleaners, and degreasers.

D Work in a confined space only if it is well ventilated, or while

wearing an air-supplied respirator. Always have a trained watch-

person nearby. Welding fumes and gases can displace air and

lower the oxygen level causing injury or death. Be sure the breath-

ing air is safe.

D Do not weld in locations near degreasing, cleaning, or spraying op-

erations. The heat and rays of the arc can react with vapors to form

highly toxic and irritating gases.

D Do not weld on coated metals, such as galvanized, lead, or

cadmium plated steel, unless the coating is removed from the weld

area, the area is well ventilated, and if necessary, while wearing an

air-supplied respirator. The coatings and any metals containing

these elements can give off toxic fumes if welded.

OM-1313 Page 2

Arc rays from the welding process produce intense

visible and invisible (ultraviolet and infrared) rays

that can burn eyes and skin. Sparks fly off from the

weld.

ARC RAYS can burn eyes and skin.

D Wear a welding helmet fitted with a proper shade of filter to protect

your face and eyes when welding or watching (see ANSI Z49.1

and Z87.1 listed in Safety Standards).

D Wear approved safety glasses with side shields under your

helmet.

D Use protective screens or barriers to protect others from flash and

glare; warn others not to watch the arc.

D Wear protective clothing made from durable, flame-resistant mate-

rial (leather and wool) and foot protection.

Welding on closed containers, such as tanks,

drums, or pipes, can cause them to blow up. Sparks

can fly off from the welding arc. The flying sparks, hot

workpiece, and hot equipment can cause fires and

burns. Accidental contact of electrode to metal objects can cause

sparks, explosion, overheating, or fire. Check and be sure the area is

safe before doing any welding.

WELDING can cause fire or explosion.

D Protect yourself and others from flying sparks and hot metal.

D Do not weld where flying sparks can strike flammable material.

D Remove all flammables within 35 ft (10.7 m) of the welding arc. If

this is not possible, tightly cover them with approved covers.

D Be alert that welding sparks and hot materials from welding can

easily go through small cracks and openings to adjacent areas.

D Watch for fire, and keep a fire extinguisher nearby.

D Be aware that welding on a ceiling, floor, bulkhead, or partition can

cause fire on the hidden side.

D Do not weld on closed containers such as tanks, drums, or pipes,

unless they are properly prepared according to AWS F4.1 (see

Safety Standards).

D Connect work cable to the work as close to the welding area as

practical to prevent welding current from traveling long, possibly

unknown paths and causing electric shock and fire hazards.

D Do not use welder to thaw frozen pipes.

D Remove stick electrode from holder or cut off welding wire at

contact tip when not in use.

D Wear oil-free protective garments such as leather gloves, heavy

shirt, cuffless trousers, high shoes, and a cap.

D Remove any combustibles, such as a butane lighter or matches,

from your person before doing any welding.

FLYING METAL can injure eyes.

D Welding, chipping, wire brushing, and grinding

cause sparks and flying metal. As welds cool,

they can throw off slag.

D Wear approved safety glasses with side

shields even under your welding helmet.

BUILDUP OF GAS can injure or kill.

D Shut off shielding gas supply when not in use.

D Always ventilate confined spaces or use

approved air-supplied respirator.

HOT PARTS can cause severe burns.

D Do not touch hot parts bare handed.

D Allow cooling period before working on gun or

torch.

MAGNETIC FIELDS can affect pacemakers.

D Pacemaker wearers keep away.

D Wearers should consult their doctor before

going near arc welding, gouging, or spot

welding operations.

NOISE can damage hearing.

Noise from some processes or equipment can

damage hearing.

D Wear approved ear protection if noise level is

high.

Shielding gas cylinders contain gas under high

pressure. If damaged, a cylinder can explode. Since

gas cylinders are normally part of the welding

process, be sure to treat them carefully.

CYLINDERS can explode if damaged.

D Protect compressed gas cylinders from excessive heat, mechani-

cal shocks, slag, open flames, sparks, and arcs.

D Install cylinders in an upright position by securing to a stationary

support or cylinder rack to prevent falling or tipping.

D Keep cylinders away from any welding or other electrical circuits.

D Never drape a welding torch over a gas cylinder.

D Never allow a welding electrode to touch any cylinder.

D Never weld on a pressurized cylinder − explosion will result.

D Use only correct shielding gas cylinders, regulators, hoses, and fit-

tings designed for the specific application; maintain them and

associated parts in good condition.

D Turn face away from valve outlet when opening cylinder valve.

D Keep protective cap in place over valve except when cylinder is in

use or connected for use.

D Read and follow instructions on compressed gas cylinders,

associated equipment, and CGA publication P-1 listed in Safety

Standards.

OM-1313 Page 3

1-3. Additional Symbols for Installation, Operation, and Maintenance

FIRE OR EXPLOSION hazard.

D Do not install or place unit on, over, or near

combustible surfaces.

D Do not install unit near flammables.

D Do not overload building wiring − be sure power supply system is

properly sized, rated, and protected to handle this unit.

FALLING UNIT can cause injury.

D Use lifting eye to lift unit only, NOT running

gear, gas cylinders, or any other accessories.

D Use equipment of adequate capacity to lift and

support unit.

D If using lift forks to move unit, be sure forks are

long enough to extend beyond opposite side of

unit.

OVERUSE can cause OVERHEATING

D Allow cooling period; follow rated duty cycle.

D Reduce current or reduce duty cycle before

starting to weld again.

D Do not block or filter airflow to unit.

STATIC (ESD) can damage PC boards.

D Put on grounded wrist strap BEFORE handling

boards or parts.

D Use proper static-proof bags and boxes to

store, move, or ship PC boards.

MOVING PARTS can cause injury.

D Keep away from moving parts.

D Keep away from pinch points such as drive

rolls.

WELDING WIRE can cause injury.

D Do not press gun trigger until instructed to do

so.

D Do not point gun toward any part of the body,

other people, or any metal when threading

welding wire.

MOVING PARTS can cause injury.

D Keep away from moving parts such as fans.

D Keep all doors, panels, covers, and guards

closed and securely in place.

H.F. RADIATION can cause interference.

D High-frequency (H.F.) can interfere with radio

navigation, safety services, computers, and

communications equipment.

D Have only qualified persons familiar with

electronic equipment perform this installation.

D The user is responsible for having a qualified electrician prompt-

ly correct any interference problem resulting from the installa-

tion.

D If notified by the FCC about interference, stop using the

equipment at once.

D Have the installation regularly checked and maintained.

D Keep high-frequency source doors and panels tightly shut, keep

spark gaps at correct setting, and use grounding and shielding to

minimize the possibility of interference.

ARC WELDING can cause interference.

D Electromagnetic energy can interfere with

sensitive electronic equipment such as

computers and computer-driven equipment

such as robots.

D Be sure all equipment in the welding area is

electromagnetically compatible.

D To reduce possible interference, keep weld cables as short as

possible, close together, and down low, such as on the floor.

D Locate welding operation 100 meters from any sensitive elec-

tronic equipment.

D Be sure this welding machine is installed and grounded

according to this manual.

D If interference still occurs, the user must take extra measures

such as moving the welding machine, using shielded cables,

using line filters, or shielding the work area.

1-4. Principal Safety Standards

Safety in Welding and Cutting, ANSI Standard Z49.1, from American

Welding Society, 550 N.W. LeJeune Rd, Miami FL 33126

Safety and Health Standards, OSHA 29 CFR 1910, from Superinten-

dent of Documents, U.S. Government Printing Office, Washington, D.C.

20402.

Recommended Safe Practices for the Preparation for Welding and Cut-

ting of Containers That Have Held Hazardous Substances, American

Welding Society Standard AWS F4.1, from American Welding Society,

550 N.W. LeJeune Rd, Miami, FL 33126

National Electrical Code, NFPA Standard 70, from National Fire Protec-

tion Association, Batterymarch Park, Quincy, MA 02269.

Safe Handling of Compressed Gases in Cylinders, CGA Pamphlet P-1,

from Compressed Gas Association, 1235 Jefferson Davis Highway,

Suite 501, Arlington, VA 22202.

Code for Safety in Welding and Cutting, CSA Standard W117.2, from

Canadian Standards Association, Standards Sales, 178 Rexdale

Boulevard, Rexdale, Ontario, Canada M9W 1R3.

Safe Practices For Occupation And Educational Eye And Face

Protection, ANSI Standard Z87.1, from American National Standards

Institute, 1430 Broadway, New York, NY 10018.

Cutting And Welding Processes, NFPA Standard 51B, from National

Fire Protection Association, Batterymarch Park, Quincy, MA 02269.

OM-1313 Page 4

1-5. 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 electro-

magnetic 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 power-

frequency 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.

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 opera-

tor as practical.

5. Connect work clamp to workpiece as close to the weld as possi-

ble.

About Pacemakers:

Pacemaker wearers consult your doctor first. If cleared by your doctor,

then following the above procedures is recommended.

OM-1313 Page 5

SECTION 2 − INSTALLATION

2-1. Specifications

Rated Welding

Output

Amperage

Range

Maximum

Open-Circuit

Voltage DC

Amperes Input at

Rated Load

Output, 60 Hz,

Single-Phase

Weight

Overall

Dimensions

Voltage DC

200 V 230 V KVA KW

150 A @ 23 Volts

DC, 60% Duty Cycle

30 − 185 33 30 (1.6)* 26 (1.4)* 6 (0.27)* 5 (0.13)*

165 lb

(75 kg)

Length: 36 in

(915 mm)

Width: 18 in

(457 mm)

Height: 27 in

(686 mm)

Wire Type And Diameter

Calculated Wire Speed

Max Wire Feed Speed

Solid Steel /

Stainless Steel

Flux Cored Aluminum

Calculated Wire Speed

Range At No Load

Max Wire Feed Speed

While Welding

.023 − .035 in

(0.6 - 0.9 mm)

.030 − .045 in

(0.8 − 1.2 mm)

.030 − .035 in

(0.8 − 0.9 mm)

138 − 795 IPM (3.5 − 20.3 m/min) 650 IPM (16.5 m/min)

*While idling

2-2. Volt-Ampere Curves

va_curve1 4/95 − SB-180 824

Volt-ampere curves show mini-

mum and maximum voltage and

amperage output capabilities of

unit. Curves of other settings fall be-

tween curves shown.

OM-1313 Page 6

6 Minutes Welding 4 Minutes Resting

2-3. Duty Cycle And Overheating

Duty Cycle is percentage of 10 min-

utes that unit can weld at rated load

without overheating.

If unit overheats, thermostat(s)

opens, output stops, and cooling

fan runs. Wait fifteen minutes for

unit to cool. Reduce amperage or

voltage, or duty cycle before

welding.

Y Exceeding duty cycle can

damage unit and void

warranty.

Overheating

A or V

Reduce Duty Cycle

Minutes

duty1 4/95 − SB-181 009

60% Duty Cycle At 150 Amperes

OM-1313 Page 7

2-4. Installing Work Clamp

1 Work Cable

2 Boot

Slide boot onto work cable. Route

cable out front panel opening from

inside.

3 Negative (−) Output Terminal

Connect cable to terminal and

cover connection with boot.

4 Hardware

5 Work Clamp

Route cable through clamp handle

and secure as shown.

Close door.

ST-801 566

1/2, 3/4 in

Tools Needed:

2-5. Installing Gas Supply

ST-801 571 / Ref. ST-109 492

1 Cylinder Rack

2 Chain

Obtain gas cylinder and chain cylin-

der to rack.

3 Gas Hose Fitting

4CO

Washer

5 Regulator

Install washer and regulator onto

cylinder.

6 Gas Hose Connection

Obtain gas hose with fittings and

install between regulator and

welding power source.

7 Flow Adjust

Typical flow rate is 20 cfh (cubic feet

per hour).

5/8, 1-1/8 in

Tools Needed:

OM-1313 Page 8

2-6. Installing Welding Gun

Ref. ST-801 567

1 Drive Assembly

2 Gun Securing Knob

3 Gun End

Loosen securing knob. Insert gun

end through opening until it bottoms

against drive assembly. Tighten

nut.

4 Gun Trigger Plug

Insert plug into receptacle, and

tighten threaded collar.

Close door.

2-7. Setting Gun Polarity

1 Polarity Changeover Label

(Located Near Drive

Assembly)

Always read and follow manufac-

ture’s recommended polarity.

3/4, 11/16 in

Wire Drive Assembly Lead

To Positive (+) Output Terminal

Work Clamp Lead To

Negative (−) Output Terminal

GUN POLARITY

CHANGEOVER CONNECTIONS

Reverse Lead Connections − For Electrode

Negative (DCEN) For Flux Cored Wires

(FCAW Process). Drive Assembly

Becomes Negative

S-144 449-D

Tools Needed:

OM-1313 Page 9

2-8. Installing Wire Spool And Adjusting Hub Tension

ST-072573-B

When a slight force is needed

to turn spool, tension is set.

15/16 in

Use compression spring with

8 in (200 mm) spools.

Tools Needed:

2-9. Changing Input Voltage

ST-801 580-A

Y Turn Off unit, and disconnect

input power.

Unit was shipped from factory set

for 230 volts.

1 Transformer T1

2 Rear Of Power Switch S1

3 Lead Marked 230 Volt And

Fan Motor Lead

Disconnect 230 volt lead and fan

motor lead from rear of S1. Leave

fan motor lead connected to 230

volt lead.

4 Lead Marked 200 Volt

Remove cable tie, and slide short

piece of sleeving off 200 volt lead,

and slide sleeving over end of 230

volt and fan motor leads. Fold

sleeving over and secure in place.

Connect 200 volt lead to S1 where

230 volt lead was removed.

Reinstall wrapper.

3/8, 7/16 in

Tools Needed:

OM-1313 Page 10

2-10. Electrical Service Guide

Input Voltage

200 230

Input Amperes At Rated Output

30 26

Max Recommended Standard Fuse Or Circuit Breaker Rating In

Amperes

45 40

Min Input Conductor Size In AWG/Kcmil

10 10

Max Recommended Input Conductor Length In Feet (Meters)

97 (29) 128 (39)

Min Grounding Conductor Size In AWG/Kcmil

10 10

Reference: 1996 National Electrical Code (NEC). S-0092-J

2-11. Selecting A Location And Connecting Input Power

1 Rating Label

Supply correct input power.

2 Plug

3 Receptacle

Connect plug to receptacle.

4 Input And Grounding

Conductors

Connect directly to line disconnect

device if hard wiring is required.

5 Line Disconnect Device

See Section 2-10.

Y Special installation may be

required where gasoline or

volatile liquids are present −

see NEC Article 511 or CEC

Section 20.

ST-801 568

230 VAC, 1

18 in (457 mm) of

space for airflow

Y Always connect grounding

conductor first.

= GND/PE

Y Do not move or operate unit

where it could tip.

OM-1313 Page 11

2-12. Installing Drive Roll, Inlet Wire Guide, And Threading Welding Wire

Ref. ST-801 570 / ST-801 083 / S-0627-A

6 in

(150 mm)

4 in

(102 mm)

Tighten

WOOD

Open pressure assembly. Pull and hold wire; cut off end. Push wire thru guides into gun;

continue to hold wire.

Close and tighten pressure

assembly, and let go of wire.

Remove gun nozzle and contact tip. Turn On.

Press gun trigger until wire

comes out of gun. Reinstall

contact tip and nozzle.

Feed wire to check drive roll pressure.

Tighten knob enough to prevent slipping.

Cut off wire. Close

and latch door.

Tools Needed:

OM-1313 Page 12

2-13. Weld Parameter

Wire Type,

Wire

Material Thickness

Wire Type,

Shielding Gas,

And Flow Rate

Wire

Diameter

(inch)

Operator

Controls

3/8 in

(9.5

mm)

1/4 in

(6.4

mm)

3/16 in

(4.8

mm)

1/8 in

(3.2

mm)

12 ga 14 ga 16 ga 18 ga 20 ga 22 ga

.023

Voltage Tap − − 6 5 4 3 3 2 1 1 − −

.023

Wire Speed − − 100 90 70 65 60 40 25 20 − −

E70S-6

.030

Voltage Tap − − 4 4 3 2 2 2 1 − − − −

20 cfh+

.030

Wire Speed − − 70 60 50 45 40 30 25 − − − −

.035

Voltage Tap 6 4 4 3 3 2 2 1 − − − −

.035

Wire Speed 80 65 40 35 30 25 30 10 − − − −

.023

Voltage Tap − − 3 4 3 3 2 2 1 1 1

.023

Wire Speed − − 80 90 70 60 70 40 45 25 12

E70S-6

75% Argon

.030

Voltage Tap 6 4 4 3 3 2 2 1 1 − −

75% Argon

25% CO

20 cfh+

.030

Wire Speed 90 58 70 55 50 48 45 30 5 − −

20 cfh+

.035

Voltage Tap 6 4 4 3 3 2 2 1 1 − −

.035

Wire Speed 80 48 60 50 35 27 30 11 3 − −

.030

Voltage Tap 5 4 4 3 2 2 1 1 − − − −

E71T-GS

Flux Core

.030

Wire Speed 80 65 65 50 30 30 10 5 − − − −

E71T-GS

Flux Core

.035

Voltage Tap 5 4 3 2 2 2 1 1 − − − −

.035

Wire Speed 5 50 40 30 25 20 10 0 − − − −

.023

Voltage Tap 5 4 4 4 3 3 3 2 2 2

.023

Wire Speed 95 85 80 60 50 50 50 30 20 20

ER 308

Stainless Steel

.030

Voltage Tap 5 5 4 3 3 2 2 2 1 − −

Stainless Steel

Tri-Mix

20 cfh+

.030

Wire Speed 70 70 70 50 45 50 45 40 0 − −

20 cfh+

.035

Voltage Tap 6 5 5 4 3 2 2 2 − − − −

.035

Wire Speed 65 40 40 30 30 25 20 10 − − − −

*Do not change Voltage switch position while welding Wire Speed value in Table is a starting value only, and Wire Speed control setting can be fine

tuned during welding. S-181 020-A

OM-1313 Page 13

SECTION 3 − OPERATION

3-1. Front Panel Controls

Ref. ST-180 930

Controls For Standard Units

1 Wire Speed Control

Use control to select a wire feed

speed. Scale around control is not

actual wire feed speed, but is for

reference only.

2 Voltage Switch

The higher the selected number,

the thicker the material that can be

welded (see Section 2-13). Do not

switch under load.

3 Pilot Light

4 Power Switch

OM-1313 Page 14

SECTION 4 − MAINTENANCE & TROUBLESHOOTING

4-1. Routine Maintenance

Y Disconnect power

before maintaining.

. Maintain more often

during severe conditions.

3 Months

Replace

Damaged Or

Unreadable

Labels

Clean And

Tighten

Weld

Terminals

Repair Or

Replace

Cracked

Cables And

Cords

6 Months

Blow Out Or

Vacuum Inside

4-2. Circuit Breakers CB1 And CB2

Ref. ST-801 567

Y Turn Off unit.

1 Circuit Breaker CB1

CB1 protects the transformer from

overload. If CB1 opens, wire

feeding stops.

2 Circuit Breaker CB2

CB2 protects the trigger circuit from

overload. If CB1 opens, weld output

stops.

Press button to reset circuit

breaker. Close door.

4-3. Changing Drive Roll And Inlet Wire Guide

Ref. ST-801 569

1 Drive Roll

Choose correct drive roll for wire

type, and install as shown.

2 Inlet Wire Guide

Remove guide by pressing on

barbed area, or cutting off one end

near housing and pulling it out of

hole. Push new guide into hole from

rear until it snaps in place.

Tools Needed:

3/32 in

OM-1313 Page 15

4-4. Cleaning Or Replacing Gun Liner

Ref. ST-800 797-A

3/8 in

To Reassemble Gun:

Insert new liner.

Install and tighten wire outlet guide.

Cut liner off 3/4 in (20 mm) (3/8 in

[9.5 mm] for aluminum) from head

tube.

Install adapter, contact tip, and

nozzle.

Lay gun cable out straight

before installing new liner.

Head tube

3/8 in

Wire Outlet Guide

Remove liner.

Remove nozzle, contact tip,

adapter, and wire outlet guide.

Blow out gun casing.

Y Disconnect gun first.

Tools Needed:

OM-1313 Page 16

4-5. Replacing Switch And/Or Head Tube

Ref. ST-800 795-A

Do not disturb cable connection between

cable connector and connector nut.

1 Remove handle

locking nut.

2 Remove switch housing. Note: If installing new

switch, push switch lead connectors onto terminal of

new switch (polarity is not important). Install switch

back into handle, and secure with handle locking nut.

If replacing head tube, continue to end of figure.

3 Slide handle.

4 Secure head

tube in vice.

5 Remove shock wash-

ers from front and

rear of head tube.

6 Loosen jam nut. Remove

from vice and turn head

tube out by hand.

7 Install both existing shock washers

to new head tube and hand-tighten

head tube into connector cable.

8 Place head tube in vice and tighten

to within 1/8 in (3.2 mm) spacing be-

tween connector cable and body.

9 Remove from vice. Reposition

handle and install switch housing.

Secure with handle locking nut.

Y Disconnect gun first.

3/4 in

Tools Needed:

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Miller Millermatic 185 Owner's manual

Brand: Miller

Model: Millermatic 185

Category: Welding System

Type: Owner's manual

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Miller Millermatic 185 Owner's manual

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