Table Of Contents - MAC TOOLS MW165 Owner's Manual

WELDING
can cause
fire
or
explosion.
Sparks and spatteufly off from
the welding
arc.
The
flying
sparks
and hot metal, weld spatter, hot
workpiece, and hot equipment
can cause
fires and
bums. Accidental contact of electrode
or
welding
wire to metal objects
can cause
sparks, overheating,
orlire.
1. Protect
yourself
and others from flying sparks and hot metal.
2.
Do not weld where flying sparks
can
strike flammable material.
3. Remove all flammables within 35 ft (10.7 m)
of the
welding
arc.
If thIs is
not
possible, tightly
cover
them with approved
covers.
4. Be alert that welding sparks and hot materials from welding
can
easily
go
through
small cracks and openings to adjacent
areas
FLYING SPARKS AND HOT METAL
can
cause
injury.
Chipping and grinding
cause
flying
metal. As welds
cool, they
can
throw off
slag.
CYLINDERS
can
explode
if
damaged.
Shielding
gas
cylinders contain gas under high
pressure.
lfdamaged,
a
cylinder
can
explode.
Since
gas
cylinders
are
normally
part
of
the welding
process, be
sure
to treat them carefully.
1. Protect compressed
gas
cylinders from excessive
heat,
mechanical
shocks,
and
arcs.
2.
Install and
secure
cylinders in
an
upright position by chaining
them to
a
stationary support
or
equipment cylinder
rack to
prevent falling
or
tipping.
5.
Watch for fire,
and keep
a
fire
extinguisher nearby.
6.
Be
aware
that
welding
on a
ceilIng, floor, bulkhead,
or
partition
can cause
fire
on
the hidden side.
7. Do not weld
on
closed containers such
as
tanks
or
drums.
8. 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.
9. Do not
use
welder to thaw frozen
pipes.
10. Remove stick electrode from holder
or
cut
off
welding wire at
contact tip when
not
in
use.
11.
Wear oil-free
protective
garments
such
as
leather
gloves,
heavy
shirt, cuffless trousers,
high shoes,
and
a
cap.
1.
Wear
approved
face shield
or
safety goggles. Side shields
recommended.
2.
Wear proper
body protection to
protect
skin.
3. Keep cylinders
away
from
any
welding
or
other electrical
circuits.
4. Never allow
a
welding electrode
to touch
any
cylinder.
5. Use only correct shielding
gas
cylinders, regulators,
hoses, and
fittings designed for the specific application:
maintain them and
associated
parts
in good condition.
6. Turn face away from valve outlet when
opening cylinder valve.
7. Keep protective
cap in
place
over
valve
except when cylinder is
in
use or
connected for
use.
8. Read and follow instructions
on
compressed
gas
cylinders.
associated equipment, and CGA
publication P-i listed in Safety
Standards.
PRINCIPAL SAFETY STANDARDS
Safety
in Welding and Cutting,
ANSI Standard Z49.1, from American Welding Society, 550 N.W. LeJeune Rd. Miami FL 33126
Safetyand Health
Standards,
OSHA 29 CFR 1910, from Superintendent of Documents, U.S. Government Printing Office, Washington,
D.C. 20402.
Recommended Safe Practices for the Preparation for Welding and Cutting of Containers That Have Held Hazardous Substances,
American Weld
ing Society Standard AWS F4.1, from American Welding Society, 550 N.W. LeJeune Ad, Miami,
FL 33126
National Electrical Code, NFPA Standard 70,
from National Fire Protection
Association, Batterymarch Park, Quincy, MA 02269.
Safe Handling of Compressed Gases in Cylinders.
CGA Pamphlet
P-i,
from Compressed Gas Association, 1235 Jefferson Davis
Highway, Suite
501. Arlington, VA 22202.
Code forSafety in
Welding and
Cutting, CSA Standard Wi 17.2, from Canadian Standards Association, Standards Sales, 178 Rexdale Boulevard.
Rexdale, Ontario,
Canada M9W 1
R3.
Safe Practices ForOccupationAndEducational Eye And Face Protection, ANSI Standard Z87. i,from American National Standards
Institute, 1430
Broadway, New York, NY 10018.
Cutting
And
Welding Processes,
NFPA Standard 51 B, from National Fire Protection Association, Batterymarch Park, Quincy, MA
02269.
TABLE OF CONTENTS
Ref. sri 2/92
SECTION 1 SPECIFICATIONS
i-i. DutyCycleChart
1-2. Volt-Ampere Curves
SECTION 2 INSTALLATION
2-1.
Installing Work Clamp
2-2. Installing Welding Gun
2-3. Gun Polarity For Wire Type
2-4.
Installing
Gas Supply
2-5. Electrical Service Guide
2-6. Selecting A Location And
Connecting Input Power
2-7.
Threading
And Feeding Welding Wire
2-8. Weld Parameters
SECTION 3-OPERATION
SECTION
4
MAINTENANCE & TROUBLESHOOTING
4-1.
Overload Protection
4-2.
Drive
Assembly
Maintenance
4-3. Gun Maintenance
4-4. Troubleshooting
SECTION 5-ELECTRICAL DIAGRAM
12
SECTION
6
PARTS LIST
Figure 6-1. Main Assembly
Figure
6-2. MWG-16OMA Gun
2
2
3
3
4
4
5
6
7
8
9
10
ii
ii
13
14