Miller Electric MTG Plus Tungsten Grinder User manual

MTG Plus
Tungsten Grinder
Processes
Description
TIG (GTAW) Welding
Tungsten Grinder
OM-230 915B 2007−03
Visit our website at
www.MillerWelds.com
File: TIG (GTAW)

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.
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
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.
Miller is the first welding
equipment manufacturer in
the U.S.A. to be registered to
the ISO 9001:2000 Quality
System Standard.
Working as hard as you do
−every power source from
Miller is backed by the most
hassle-free warranty in the
business.
From Miller to You
Mil_Thank 2005−04

TABLE OF CONTENTS
SECTION 1 −SAFETY PRECAUTIONS - READ BEFORE USING 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1. Symbol Usage 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2. Tungsten Grinding Hazards 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3. California Proposition 65 Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4. Principal Safety Standards 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 2 −DEFINITIONS 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1. Manufacturer’s Rating Label For CE Products 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2. Symbols And Definitions 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 3 −SPECIFICATIONS 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1. Description 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-2. Included With Your Unit 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-3. Specifications 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 4 −INSTALLATION 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-1. Connecting Input Power 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-2. Connecting Grinder To Exhaust (Vacuum) Hose 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 5 −OPERATION 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-1. Grinder Components 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-2. Grinding And Cutting Electrodes 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-3. Replacing Grinding Wheels 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-4. Installing Optional Double-Decker Kit 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-5. Installing Grinder Mounting Bracket 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 6 −MAINTENANCE & TROUBLESHOOTING 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1. Routine Maintenance 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2. Troubleshooting 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 7 −PARTS LIST 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OM-230 915 Page 1
SECTION 1 −SAFETY PRECAUTIONS - READ BEFORE USING
Tung_Grind 9/06
Warning: Protect yourself and others from injury — read and follow these precautions.
1-1. Symbol Usage
Means Warning! Watch Out! There are possible hazards
with this procedure! The possible hazards are shown in
the adjoining symbols.
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. Tungsten Grinding 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 Safety Standards listed in Section 1-4. 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.
Touching live electrical parts can cause fatal shocks
or severe burns. The input power circuit and
machine internal circuits are also live when power is
on. Incorrectly installed or improperly grounded
equipment is a hazard.
Do not touch live electrical parts.
Wear dry, hole-free insulating gloves and body protection.
Disconnect input power before installing or servicing this
equipment.
Properly install this equipment according to its Owner’s Manual
and national, state, and local codes.
Frequently inspect input power cord for damage or bare wiring −
replace cord immediately if damaged −bare wiring can kill.
Turn off all equipment when not in use.
Use only well-maintained equipment. Repair or replace damaged
parts at once. Maintain unit according to manual.
Keep all panels and covers securely in place.
Grinding produces dust. Breathing this dust can be
hazardous to your health.
GRINDING DUST can be hazardous.
Do not breathe the dust.
Use local exhaust (forced ventilation) to remove dust or wear an
approved respirator.
Grinding dust from thoriated electrodes contains low-level radio-
active material. Consider using tungsten containing ceria,
lanthana, or yttria instead of thoria.
Properly dispose of grinder dust in an environmentally safe way.
Read and understand the Material Safety Data Sheets (MSDSs)
and the manufacturer’s instructions for metals and consumables.
GRINDING can cause FIRE OR EXPLOSION.
Do not grind where flying sparks can strike
flammable material.
Protect yourself and others from flying sparks
and hot metal.
Be alert that sparks and hot materials from grinding can easily go
through small cracks and openings to adjacent areas.
Watch for fire, and keep a fire extinguisher nearby.
FLYING SPARKS can cause injury.
Wear a face shield to protect eyes and face.
Shape tungsten electrode only on grinder with proper
guards in a safe location wearing proper face, hand,
and body protection.
Sparks can cause fires — keep flammables away.
HOT PARTS can cause severe burns.
Do not touch hot parts bare handed.
Allow cooling period before touching parts.
To handle hot parts, use proper tools and/or
wear heavy, insulated welding gloves and
clothing to prevent burns.
OVERUSE can cause OVERHEATING
Allow cooling period; follow rated duty cycle.
Keep air holes free of dust; clean if necessary.
READ INSTRUCTIONS.
Read Owner’s Manual before using or servic-
ing unit.
Use only genuine Miller replacement parts.
MOVING PARTS can cause injury.
Keep away from moving parts.
Keep all doors, panels, covers, and guards
closed and securely in place.
Have only qualified persons remove doors,
panels, covers, or guards for maintenance as
necessary.
Reinstall doors, panels, covers, or guards
when maintenance is finished and before re-
connecting input power.