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
Miller is the first welding
equipment manufacturer in
the U.S.A. to be registered to
the ISO 9001 Quality System
Standard.
help you figure out what the problem is. The
parts list will then help you to decide which
exact part you may need to fix the problem.
Warranty and service information for your
particular model are also provided.
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 catalog 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.
Working as hard as you do
– every power source from
Miller is backed by the most
hassle-free warranty in the
business.
Miller offers a Technical
Manual which provides
more detailed service and
parts information for your
unit. T o obtain a Technical
Manual, contact your local
distributor. Your distributor
can also supply you with
Welding Process Manuals
such as SMAW, GTAW,
GMAW, and GMA W-P.
WARNING
This product, when used
for welding or cutting,
produces fumes or
gases which contain
chemicals known to the
State of California to
cause birth defects and,
in some cases, cancer.
(California Health &
Safety Code Section
25249.5 et seq.)
The following terms are
used interchangeably
throughout this manual:
MIG=GMAW
SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING
1-1.Symbol Usage
Means Warning! Watch Out! There are possible hazards
with this procedure! The possible hazards are shown in
the adjoining symbols.
som _nd_4/98
Y Marks a special safety message.
. Means “Note”; not safety related.
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
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.
power circuit and machine internal circuits are also
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.
D If earth grounding of the workpiece is required, ground it directly
with a separate 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.
FUMES AND GASES can be hazardous.
Welding produces fumes and gases. Breathing
these fumes and gases can be hazardous to your
health.
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 watchperson nearby. Welding fumes and gases can displace air and
lower th e oxygen level causing injury or death. Be sure the breathing 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-1324 Page 1
ARC RAYS can burn eyes and skin.
BUILDUP OF GAS can injure or kill.
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.
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 can cause fire or explosion.
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
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.
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.
workpiece, and hot equipment can cause fires and
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.
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.
CYLINDERS can explode if damaged.
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.
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-1324 Page 2
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.
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 installation.
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.
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.
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 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
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 Protection Association, Batterymarch Park, Quincy, MA 02269.
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 t o 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.
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 FaceProtection, ANSI Standard Z87.1, from American National Standards
Institute, 1430 Broadway, New Y ork, NY 10018.
Cutting And Welding Processes, NFPA Standard 51B, from National
Fire Protection Association, Batterymarch Park, Quincy, MA 02269.
OM-1324 Page 3
1-5.EMF Information
Considerations About Welding And The Effects Of Low Frequency
Electric And Ma g netic 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 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 operator as practical.
5. Connect work clamp to workpiece as close to the weld as possible.
About Pacemakers:
Pacemaker wearers consult your doctor first. If cleared by your doctor,
then following the above procedures is recommended.
OM-1324 Page 4
SECTION 1 – CONSIGNES DE SECURITE – LIRE AVANT
UTILISATION
som _nd_fre 4/98
1-1.Signification des symboles
Signifie Mise en garde ! Soyez vigilant ! Cette procédure
présente des risques de danger ! Ceux-ci sont identifiés
par des symboles adjacents aux directives.
Y Identifie un message de sécurité particulier.
. Signifie NOTA ; n’est pas relatif à la sécurité.
1-2.Dangers relatifs au soudage à l’arc
Y Les symboles présentés ci-après sont utilisés tout au long du
présent manuel pour attirer votre attention et identifier les risques
de danger. Lorsque vous voyez un symbole, soyez vigilant et
suivez les directives mentionnées afin d’éviter tout danger. Les
consignes de sécurité présentées ci-après ne font que résumer
l’information contenue dans les normes de sécuritéénumérées
à la section 1-4. Veuillez lire et respecter toutes ces normes de
sécurité.
Y L’installation, l’utilisation, l’entretien et les réparations ne doi-
vent être confiés qu’à des personnes qualifiées.
Y Au cours de l’utilisation, tenir toute personne à l’écart et plus par-
ticulièrement les enfants.
UN CHOC ÉLECTRIQUE peut tuer.
Un simple contact avec des pièces électriques peut
provoquer une électrocution ou des blessures graves.
L’électrode et le circuit de soudage sont sous tension
dès que l’appareil est sur ON. Le circuit d’entrée et les
tension à ce moment-là. En soudage semi-automatique ou automatique,
le fil, le dévidoir, le logement des galets d’entraînement et les pièces
métalliques en contact avec le fil de soudage sont sous tension. Des
matériels mal installés ou mal mis à la terre présentent un danger.
D Ne jamais toucher les pièces électriques sous tension.
D Porter des gants et des vêtements de protection secs ne comportant
pas de trous.
D S’isoler de la pièce et de la terre au moyen de tapis ou d’autres
moyens isolants suffisamment grands pour empêcher le contact physique éventuel avec la pièce ou la terre.
D Ne pas se servir de source électrique àcourant électrique dans les zones
humides, dans les endroits confinés ou là où on risque de tomber.
D Se servir d’une source électrique àcourant électrique UNIQUEMENT si le
procédé de soudage le demande.
D Si l’utilisation d’une source électrique àcourant électrique s’avère néces-
saire, se servir de la fonction de télécommande si l’appareil en est équipé.
D Couper l’alimentation ou arrêter le moteur avant de procéder à l’instal-
lation, à la réparation ou à l’entretien de l’appareil. Déverrouiller
l’alimentation selon la norme OSHA 29 CFR 1910.147 (voir normes de
sécurité).
D Installer et mettre à la terre correctement cet appareil conformément à
son manuel d’utilisation et aux codes nationaux, provinciaux et
municipaux.
D Toujours v érifier la terre du cordon d’alimentation – Vérifier et s’assu-
rer que le fil de terre du cordon d’alimentation est bien raccordé à la
borne de terre du sectionneur ou que la fiche du cordon est raccordéeà une prise correctement mise à la terre.
D En effectuant les raccordements d’entrée fixer d’abord le conducteur
de mise à la terre approprié et contre-vérifier les connexions.
D Vérifier fréquemment le cordon d’alimentation pour voir s’il n’est pas
endommagé ou dénudé – remplacer le cordon immédiatement s’il est
endommagé– un câble dénudé peut provoquer une électrocution.
D Mettre l’appareil hors tension quand on ne l’utilise pas.
D Ne pas utiliser des câbles usés, endommagés, de grosseur insuffi-
sante ou mal épissés.
D Ne pas enrouler les câbles autour du corps.
D Si la pièce soudée doit être mise à la terre, le faire directement avec un
câble distinct.
D Ne pas toucher l’électrode quand on est en contact avec la pièce, la
terre ou une électrode provenant d’une autre machine.
circuits internes de l’appareil sont également sous
Ce groupe de symboles signifie Mise en garde ! Soyez vigilant ! Il y a des
risques de danger reliés aux CHOCS ÉLECTRIQUES, aux PIÈCES EN
MOUVEMENT et aux PIÈCES CHAUDES. Reportez-vous aux symboles
et aux directives ci-dessous afin de connaître les mesures à prendre pour
éviter tout danger.
D N’utiliser qu’un matériel en bon état. Réparer ou remplacer sur-le-
champ les pièces endommagées. Entretenir l’appareil conformément
à ce manuel.
D Porter un harnais de sécurité quand on travaille en hauteur.
D Maintenir solidement en place tous les panneaux et capots.
D Fixer le câble de retour de façon à obtenir un bon contact métal-métal
avec la pièce à souder ou la table de travail, le plus près possible de l a
soudure.
D Isoler la pince de masse quand pas mis à la pièce pour éviter le contact
avec tout objet métallique.
Il y a DU COURANT CONTINU IMPORT ANT dans les
convertisseurs après la suppression de l’alimenta-
tion électrique.
D Arrêter les convertisseurs, débrancher le courant électrique, et dé-
charger les condensateurs d’alimentation selon les instructions
indiquées dans la partie entretien avant de toucher les pièces.
LES FUMÉES ET LES GAZ peuvent
être dangereux.
Le soudage génère des fumées et des gaz. Leur
inhalation peut être dangereux pour votre santé.
D Eloigner votre tête des fumées. Ne pas respirer
D A l’intérieur, ventiler la zone et/ou utiliser un échappement au niveau
de l’arc pour l’évacuation des fumées et des gaz de soudage.
D Si la ventilation est insuffisante, utiliser un respirateur à alimenta-
tion d’air homologué.
D Lire les spécifications de sécurité des matériaux (MSDSs) et les
instructions du fabricant concernant les métaux, les consommables, les revêtements, les nettoyants et les dégraisseurs.
D Travailler dans un espace fermé seulement s’il est bien ventilé ou en
portant un respirateur à alimentation d’air. Demander toujours à un
surveillant dûment formé de se tenir à proximité. Des fumées et des
gaz de soudage peuvent déplacer l’air et abaisser le niveau d’oxygène provoquant des blessures ou des accidents mortels. S’assurer que l’air de respiration ne présente aucun danger.
D Ne pas souder dans des endroits situés à proximité d’opérations de
dégraissage, de nettoyage ou de pulvérisation. La chaleur et les
rayons de l ’arc peuvent réagir en présence de vapeurs et former des
gaz hautement toxiques et irritants.
D Ne pas souder des métaux munis d’un revêtement, tels que l’acier
galvanisé, plaqué en plomb ou au cadmium à moins que le revêtement n’ait été enlevé dans la zone de soudure, que l’endroit soit bien
ventilé, et si nécessaire, en portant un respirateur à alimentation
d’air. Les revêtements et tous les métaux renfermant ces éléments
peuvent dégager des fumées toxiques en cas de soudage.
les fumées.
OM-1324 Page 5
LES RAYONS DE L’ARC peuvent pro-
voquer des brûlures dans les yeux et
sur la peau.
Le rayonnement de l’arc du procédé de soudage
génère des rayons visibles et invisibles intenses
des brûlures dans les yeux et sur la peau. Des étincelles sont projetées
pendant le soudage.
D Porter un casque de soudage muni d’un écran de filtre approprié pour
protéger votre visage et vos yeux pendant le soudage ou pour regarder (voir ANSI Z49.1 et Z87.1 énuméré dans les normes de sécurité).
D Porter des protections approuvés pour les oreilles si le niveau sondre est
trop élevé.
D Utiliser des écrans ou des barrières pour protéger des tiers de l’éclair
et de l’éblouissement; demander aux autres personnes de ne pas regarder l’arc.
D Porter des vêtements de protection constitué dans une matière dura-
ble, résistant au feu (cuir ou laine) et une protection des pieds.
(ultraviolets et infrarouges) susceptibles de provoquer
LES ACCUMULATIONS DE GAZ risquent de provoquer des blessures ou
même la mort.
D Fermer l’alimentation du gaz protecteur en cas de
non utilisation.
D Veiller toujours à bien aérer les espaces confinés ou se servir d’un respi-
rateur d’adduction d’air homologué.
DES PIÈCES CHAUDES peuvent provoquer des brûlures graves.
D Ne pas toucher des parties chaudes à mains nues
D Prévoir une période de refroidissement avant
d’utiliser le pistolet ou la torche.
LE SOUDAGE peut provoquer un
incendie ou une explosion.
Le soudage effectué sur des conteneurs fermés tels
que des réservoirs, tambours ou des conduites peut
provoquer leur éclatement. Des étincelles peuvent être
les, des pièces chaudes et des équipements chauds peut provoquer des
incendies et des brûlures. Le contact accidentel de l’électrode avec des
objets métalliques peut provoquer des étincelles, une explosion, un
surchauffement o u u n incendie. A vant de commencer le soudage, vérifier
et s’assurer que l’endroit ne présente pas de danger.
D Se protéger et d’autres personnes de la projection d’étincelles et de
métal chaud.
D Ne pas souder dans un endroit là où des étincelles peuvent tomber sur
des substances inflammables.
D Déplacer toutes les substances inflammables à une distance de 10,7
m de l’arc de soudage. En cas d’impossibilité les recouvrir soigneusement avec des protections homologués.
D Des étincelles et des matériaux chauds du soudage peuvent facile-
ment passer dans d’autres zones en traversant de petites fissures et
des ouvertures.
D Surveiller tout déclenchement d’incendie et tenir un extincteur à proxi-
mité.
D Le soudage effectué sur un plafond, plancher, paroi ou séparation
peut déclencher un incendie de l’autre côté.
D Ne pas effectuer le soudage sur des conteneurs fermés tels que des
réservoirs, tambours, ou conduites, à moins qu’ils n’aient été préparés correctement conformément à AWS F4.1 (voir les normes de
sécurité).
D Brancher le câble sur la pièce le plus près possible de la zone de sou-
dage pour éviter le transport du courant sur une longue distance par
des chemins inconnus éventuels en provoquant des risques d’élec-
trocution et d’incendie.
D Ne pas utiliser le poste de soudage pour dégeler des conduites ge-
lées.
D En cas de non utilisation, enlever la baguette d’électrode du porte-
électrode ou couper le fil à la pointe de contact.
D Porter des vêtements de protection dépourvus d’huile tels que des
gants en cuir, une chemise en matériau lourd, des pantalons sans re-
vers, des chaussures hautes et un couvre chef.
D Avant de souder, retirer toute substance combustible de vos poches
telles qu’un allumeur au butane ou des allumettes.
projetées de l’arc de soudure. La projection d’étincel-
DES PARTICULES VOLANTES
peuvent blesser les yeux.
D Le soudage, l’écaillement, le passage de la pièce
à la brosse en fil de fer, et le meulage génèrent
lantes. Pendant la période de refroidissement des soudures, elles ris-
quent de projeter du laitier.
D Porter des lunettes de sécurité avec écrans latéraux ou un écran facial.
des étincelles et des particules métalliques vo-
LES CHAMPS MAGNÉTIQUES peuvent
affecter les stimulateurs cardiaques.
D Porteurs d e stimulateur cardiaque, restez à distance.
D Les porteurs d’un stimulateur cardiaque doivent
d’abord consulter leur médecin avant de s’approcher
des opérations de soudage à l’arc, de gougeage ou
de soudage par points.
LE BRUIT peut affecter l’ouïe.
Le bruit des processus et des équipements peut affecter
l’ouïe.
D Porter des protections approuvés pour les oreilles si
le niveau sondre est trop élevé.
Si des BOUTEILLES sont endommagées, elles pourront exploser.
Des bouteilles de gaz protecteur contiennent du gaz
sous haute pression. Si une bouteille est endommagée, elle peut exploser. Du fait que les bouteilles de gaz
manipuler avec précaution.
D Protéger les bouteilles de gaz comprimé d’une chaleur excessive,
des chocs mécaniques, du laitier, des flammes ouvertes, des étin-
celles et des arcs.
D Placer les bouteilles debout en les fixant dans un support stationnai-
re ou dans un porte-bouteilles pour les empêcher de tomber ou de
se renverser.
D Tenir les bouteilles éloignées des circuits d e soudage ou autres cir-
cuits électriques.
D Ne jamais placer une torche de soudage sur une bouteille à gaz.
D Une électrode de soudage ne doit jamais entrer en contact avec une
bouteille.
D Ne jamais souder une bouteille pressurisée – risque d’explosion.
D Utiliser seulement des bouteilles de gaz protecteur, régulateurs,
tuyaux et raccords convenables pour cette application spécifique;
les maintenir ainsi que les éléments associés en bon état.
D Ne pas tenir la tête en face de la sortie en ouvrant la soupape de la
bouteille.
D Maintenir le chapeau de protection sur la soupape, sauf en cas d’uti-
lisation ou de branchement de la bouteille.
D Lire et suivre les instructions concernant les bouteilles de gaz com-
primé, les équipements associés et les publications P-1 CGA énumérées dans les normes de sécurité.
font normalement partie du procédé de soudage, les
OM-1324 Page 6
1-3.Dangers supplémentaires en relation avec l’installation, le fonctionnement
et la maintenance
Risque D’INCENDIE OU
D’EXPLOSION.
D Ne pas placer l’appareil sur, au-dessus ou à proxi-
mité de surfaces infllammables.
D Ne pas installer l’appareil à proximité de produits inflammables
D Ne pas surcharger l’installation électrique – s”assurer que l’alimen-
tation est correctement dimensionné et protégé avant de mettre
l’appareil en service.
LA CHUTE DE L’APPAREIL peut
blesser.
D Utiliser l’anneau de levage uniquement pour sou-
lever l’appareil, NON PAS les chariot, les bouteilles de gaz ou tout autre accessoire.
D Utiliser un engin d’une capacité appropriée pour
D En utilisant des fourches de levage pour déplacer l’unité, s’assurer
que les fourches sont suffisamment longues pour dépasser du côté
opposé de l’appareil.
soulever l’appareil.
L’EMPLOI EXCESSIF peut
SURCHAUFFER L’ÉQUIPEMENT.
D Prévoir une période de refroidissement, respec-
ter le cycle opératoire nominal.
D Réduire le courant ou le cycle opératoire avant de
D Ne pas obstruer les passages d’air du poste.
recommancer le soudage.
DES ORGANES MOBILES peuvent
provoquer des blessures.
D Rester à l’écart des organes mobiles comme le
ventilateur.
D Maintenir fermés et fixement en place les portes,
panneaux, recouvrements et dispositifs de
protection.
LE RAYONNEMENT HAUTE FRÉ-
QUENCE (H.F.) risque de provoquer
des interférences.
D Le rayonnement haute frequence peut provoquer
des interférences avec les équipements de radio–navigation e t d e communication, les services
D Demander seulement à des personnes qualifiées familiarisées
avec des équipements électroniques de faire fonctionner l’installa-
tion.
D L’utilisateur est tenu de faire corriger rapidement par un électricien
qualifié les interférences résultant de l’installation.
D Si le FCC signale des interférences, arrêter immédiatement l’appa-
reil.
D Effectuer régulièrement le contrôle et l’entretien de l’installation.
D Maintenir soigneusement fermés les portes et les panneaux des
sources de haute fréquence, maintenir les éclateurs à une distance
correcte et utiliser une terre et et un blindage pour réduire les interfé-
rences éventuelles.
de sécurité et les ordinateurs.
LE SOUDAGE À L’ARC risque de
provoquer des interférences.
LES CHARGES ÉLECTROSTATI-
QUES peuvent endommager les circuits imprimés.
D Établir la connexion avec la barrette de terre
avant de manipuler des cartes ou des pièces.
D Utiliser des pochettes et des boîtes antistatiques
pour stocker, déplacer ou expédier des cartes de
circuits imprimes.
DES ORGANES MOBILES peuvent
provoquer des blessures.
D Ne pas s’approcher des organes mobiles.
D Ne pas s’approcher des points de coincement
tels que des rouleaux de commande.
LES FILS DE SOUDAGE peuvent provoquer des blessures.
D Ne pas appuyer sur la gachette avant d’en avoir
reçu l’instruction.
D Ne pas diriger le pistolet vers soi, d’autres person-
nes ou toute pièce mécanique en engageant le fil
de soudage.
D L’énergie électromagnétique risque de provoquer
des interférences pour l’équipement électronique
sensible tel que les ordinateurs et l’équipement
D Veiller à ce que tout l’équipement de la zone de soudage soit com-
patible électromagnétiquement.
D Pour réduire la possibilité d’interférence, maintenir les câbles de
soudage aussi courts que possible, les grouper, et les poser aussi
bas que possible (ex. par terre).
D Veiller à souder à une distance de 100 mètres de tout équipement
électronique sensible.
D Veiller à ce que ce poste de soudage soit posé et mis à la terre
conformément à ce mode d’emploi.
D En cas d’interférences après avoir pris les mesures précédentes, il
incombe à l’utilisateur de prendre des mesures supplémentaires tel-
les que le déplacement du poste, l’utilisation de câbles blindés, l’utilisation de filtres de ligne ou la pose de protecteurs dans la zone de
travail.
commandé par ordinateur tel que les robots.
LES CHAMPS MAGNÉTIQUES peuvent
affecter les stimulateurs cardiaques.
D Porteurs de stimulateur cardiaque, restez à dis-
tance.
D Les porteurs d’un stimulateur cardiaque doivent
d’abord consulter leur médecin avant de s’appro-
cher des opérations de soudage à l’arc, de gou-
geage ou de soudage par points.
OM-1324 Page 7
1-4.Principales normes de sécurité
Safety in Welding and Cutting, norme ANSI Z49.1, de l’American Wel-
ding Society, 550 N.W. Lejeune Rd, Miami FL 33126
Safety and Health Sandards, OSHA 29 CFR 1910, du Superintendent
of Documents, U.S. Government Printing Office, Washington, D.C.
20402.
Recommended Safe Practice for the Preparation for Welding and Cutting of Containers That Have Held Hazardous Substances, norme A WS
F4.1, de l ’American Welding Society, 550 N.W. Lejeune Rd, Miami FL
33126
National Electrical Code, NFPA Standard 70, de la National Fire Protection Association, Batterymarch Park, Quincy, MA 02269.
Safe Handling of Compressed Gases in Cylinders, CGA Pamphlet P-1,
de la Compressed Gas Association, 1235 Jefferson Davis Highway,
Suite 501, Arlington, VA 22202.
Règles de s écurité en soudage, coupage et procédés connexes, norme
CSA W117.2, de l’Association canadienne de normalisation, vente de
normes, 178 Rexdale Boulevard, Rexdale (Ontario) Canada M9W 1R3.
Safe Pra ctices For Occupation And Educational Eye And Face Protection, norme ANSI Z87.1, de l’American National Standards Institute,
1430 Broadway, New York, NY 10018.
Cutting and Welding Processes, norme NFPA 51B, de la National Fire
Protection Association, Batterymarch Park, Quincy, MA 02269.
1-5.Information sur les champs électromagnétiques
Données sur le soudage électrique et sur les ef fets, pour l ’organisme,
des champs magnétiques basse fréquence
Le courant de soudage, pendant son passage dans les câbles de soudage, causera des champs électromagnétiques. Il y a eu et il y a encore
un certain souci à propos de tels champs. Cependant, après avoir examiné plus de 500 études qui ont été faites pendant une période de
recherche de 17 ans, un comité spécial ruban bleu du National Research Council a conclu: “L’accumulation de preuves, suivant le
jugement du comité, n’a pas démontré que l’exposition aux champs
magnétiques et champs électriques à haute fréquence représente un
risque à la santé humaine”. Toutefois, des études sont toujours en cours
et les preuves continuent à être examinées. En attendant que les conclusions finales de la recherche soient établies, il vous serait
souhaitable de réduire votre exposition aux champs électromagnéti-
ques pendant le soudage ou le coupage.
Afin de réduire les champs électromagnétiques dans l’environnement
de travail, respecter les consignes suivantes :
1Garder les câbles ensembles en les torsadant ou en les
attachant avec du ruban adhésif.
2Mettre tous les câbles du côté opposé de l’opérateur.
3Ne pas courber pas et ne pas entourer pas les câbles autour de
votre corps.
4Garder le poste de soudage et les câbles le plus loin possible de
vous.
5Relier la pince de masse le plus près possible de la zone de
soudure.
Consignes relatives aux stimulateurs cardiaques :
Les personnes qui portent un stimulateur cardiaque doivent avant tout
consulter leur docteur. Si vous êtes déclaré apte par votre docteur, il est
alors recommandé de respecter les consignes ci–dessus.
OM-1324 Page 8
2-1.Specifications
A. 115 VAC Model
Rated W elding
Output
90 A @ 18
Volts DC, 20%
Duty Cycle
63 A @ 21
Volts DC, 20%
Duty Cycle*
Wire Type
And Dia
* CSA Rating
B. 230 VAC Model
Rated W elding
Output
130 A @ 20 Volts
DC, 30% Duty Cycle
At 60 Hz Input
Wire Type
Wire Type
And Dia
Amperage Range
30 – 135
SolidStainlessFlux CoredWire Feed Speed Range
.023 - .035 in
(0.6 - 0.9
mm)
Amperage
30 – 175
Stainless
.023 – .035 in
(0.6 – 0.9 mm)
SECTION 2 – SPECIFICATIONS
Amperes Input at
Rated Load Output 115 V, 60 Hz,
Single-Phase
20
15*
170 – 850 IPM (4.3 – 21.6 m/min) At No Load
75 – 750 IPM (1.9 – 19.1 m/min) Feeding Wire
Amperes Input at
Rated Load Output
230 V , 50/60 Hz,
Single-Phase
150 – 900 IPM (3.8 – 23.0 m/min) At No Load
75 – 850 IPM (1.9 – 21.6 m/min) Feeding Wire
KVAKW
2.88
2.20*
KVAKW
Wire Feed Speed Range
.023 - .030 in
Range
Solid/
(0.6 - 0.8
mm)
Maximum
Open-Circuit
Voltage DC
28
.030 - .045 in
(0.8 - 1.1 mm)
Maximum Open-
Circuit Voltage
DC
3019.54.603.75
Flux Cored
.030 – .045 in
(0.8 – 1.2 mm)
2.40
1.77*
Weight
W/ Gun
60 lb
(27 kg)
Weight
W/ Gun
73 lb
(33.0 kg)
Overall
Dimensions
Length: 17-1/2 in
(444 mm)
Width: 10-5/8 in
(273 mm)
Height: 15-3/4 in
(400 mm)
Overall
Dimensions
Length: 17-1/2 in
(444 mm)
Width: 10-5/8 in
(273 mm)
Height: 15-3/4 in
(400 mm)
OM-1324 Page 9
2-2.Duty Cycle And Overheating
A. 115 VAC
Model
B. 230 VAC
Model
140
120
100
80
60
40
Output Amperes
20
0
102030405060708090100
RatedOutput
Duty Cycle %
20% duty cycle at 90 amps
2 Minutes Welding8 Minutes Resting
200
180
Duty Cycle is percentage of 10 mi n 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
duty cycle before welding.
The volt-ampere curves show the
minimum and maximum voltage
and amperage output capabilities of
the welding power source. Curves
of other settings fall between the
curves shown.
Voltage Control @ 0
Voltage Control @ 1
Voltage Control @ 2
Voltage Control @ 3
Voltage Control @ 4
Voltage Control @ 5
Voltage Control @ 6
Voltage Control @ 7
Voltage Control @ 8
Voltage Control @ 9
Voltage Control @ 10
Voltage Control @ 0
Voltage Control @ 1
Voltage Control @ 2
Voltage Control @ 3
Voltage Control @ 4
Voltage Control @ 5
Voltage Control @ 6
Voltage Control @ 7
Voltage Control @ 8
Voltage Control @ 9
Voltage Control @ 10
AMPERAGE
ssb1.1 10/91 – 203 772 / 203 797
OM-1324 Page 11
SECTION 3 – INSTALLATION
3-1.Installing Welding Gun
1Drive Assembly
2Gun Securing Knob
3Gun End
Loosen knob. Insert gun end
through opening until it bottoms
against drive assembly. Tighten
knob.
4Gun Trigger Plug
Insert into receptacle, and tighten
3
4
threaded collar.
Close door.
1
2
3-2.Installing Work Clamp
1
2
Tools Needed:
5
3/8, 7/16 in
3-3.Work Cable Routing Inside Unit
Ref. 802 982 / Ref. 801 987
3
4
2
1Nut
2Work Cable From Unit
3Work Clamp
4Screw
5Work Clamp Tabs
Bend tabs around work cable.
802 456
1Work Cable
2Output Terminal Block
Insert work cable through opening
in front panel and route along back
of front panel to output terminal
block.
Close door.
OM-1324 Page 12
1
Ref. 802 982
3-4.Process/Polarity Table
ProcessPolarity
GMAW – Solid wire with shielding gas
FCAW – Self-shielding wire –
no shielding gas
3-5.Changing Polarity
DCEP
DCEP
ElectrodePOSITIVE
Electrode Positive
FORSOLIDWIRE
FOR SOLID WIRE
WorkClamp
Wor kClamp
Lead
Le a d
1
Cable Connections
Cable To GunCable To W ork
DCEP – Reverse polarityConnect to positive (+) out-
put terminal
DCEN – Straight PolarityConnect to negative (–)
output terminal
CHANGINGPOLARITY
CHANGING POLARITY
DCEN
DCEN
ElectrodeNegative
Electrode Negative
FluxCoreWire
Flux Core Wire
WorkClamp
WorkClamp
Lead
Le a d
WireDrive
WireDrive
Wir e Drive
Lead
Le a d
Wir e Drive
Lead
Le a d
Connect to negative (–) output
terminal
Connect to positive (+) output
terminal
1Lead Connections For Direct
Current Electrode Positive
(DCEP)
2Lead Connections For Direct
Current Electrode Negative
(DCEN)
Always read and follow wire
manufacturer’s recommended po-
larity , and see Section 3-4.
Close door.
2
Ref. 203 501
OM-1324 Page 13
3-6.Installing Gas Supply
4
OR
7
5
Argon Gas
Tools Needed:
1
2
3
5/8, 1-1/8 in
Obtain gas cylinder and chain to
running gear, wall, or other stationary support so cylinder cannot fall
and break off valve.
1Cap
2Cylinder Valve
Remove c ap, stand to side of valve,
and open valve slightly. Gas flow
blows dust and dirt from valve.
Close valve.
3Cylinder
4Regulator/Flowmeter
Install so face is vertical.
5Regulator/Flowmeter Gas
Hose Connection
6Welding Power Source Gas
Hose Connection
Connect customer supplied gas
hose between regulator/flowmeter
gas hose connection, and fitting on
rear of welding power source.
7Flow Adjust
Typical flow rate is 20 cfh (cubic feet
per hour). Check wire manufacturer’s recommended flow rate.
1
8CO2 Adapter (Customer Sup-
plied)
9O-Ring (Customer Supplied)
Install adapter with O-ring between
regulator/flowmeter and CO
2
cylinder.
2
6
3
89
CO2 Gas
OM-1324 Page 14
802 028 / 802 441
3-7.Selecting A Location And Connecting Input Power For 115 VAC Model
1Rating Label
2Grounded Receptacle
A 115 volt, 20 ampere individual
branch circuit protected by tim e- delay fuses or circuit breaker is required.
3Plug From Unit
Select extension cord of 14 AWG
for up to 50 ft (15 m) or 12 AWG for
50 up to 200 ft (61 m).
Y Special installation may be
required where gasoline or
volatile liquids are present –
see NEC Article 511 or CEC
Section 2 0 .
18 in
(460 mm)
1
2
18 in
(460 mm)
3
Ref. 802 980
OM-1324 Page 15
3-8.Selecting A Location And Connecting Input Power For 230 VAC Model
Input Voltage
Input Amperes At Rated Output
Max Recommended Standard Fuse Or Circuit Breaker Rating In Amperes
Min Input Conductor Size In AWG/Kcmil
Max Recommended Input Conductor Length In Feet (Meters)
Min Grounding Conductor Size In AWG/Kcmil
Reference: 1996 National Electrical Code (NEC)S-0092-J
230
20
20
14
66 (20)
12
3-10. Installing Wire Spool And Adjusting Hub Tension
Installing 4 in (102 mm) Wire Spool
When a slight force is needed
to turn spool, tension is set.
Installing 8 in (203 mm) Wire Spool
Retaining ring used
with 8 in (203 mm)
spool only.
Tools Needed:
Adapter used with
8 in (203 mm)
spool only.
When a slight force is needed
to turn spool, tension is set.
1/2 in
802 971 / 803 012 / 803 013
OM-1324 Page 17
3-11. Threading Welding Wire
Tools Needed:
1Wire Spool
2Welding Wire
3Inlet Wire Guide
4Pressure Adjustment Knob
5Drive Roll
6Gun Conduit Cable
Lay gun cable out straight.
4
6
Open pressure assembly.
1
3
2
5
. Hold wire tightly to keep it
from unraveling.
4 in
(102 mm)
Tighten
6 in
(150 mm)
Pull and hold wire; cut off end.
. Use pressure indicator
scale to set a desired
drive roll pressure.
1
2
3
4
Pressure
Indicator
Scale
Push wire thru guides into gun;
continue to hold wire.
Close and tighten pressure
assembly, and let go of wire.
Press gun trigger until wire comes
out of gun.
OM-1324 Page 18
Remove gun nozzle and contact tip.
Reinstall contact tip and nozzle.
INPUT
POWER
Turn power on.
Tighten
1
2
3
WOOD
Feed wire to check drive roll pressure.
Tighten knob enough to prevent slipping.
Cut off wire. Close door .
Ref. 802 444 / Ref. 205 837
4
4-1.Controls
SECTION 4 – OPERATION
1
2
WIRE SPEE D
MILLER ELECTRIC MF G. CO. APPLE TON, WI
1Wire Speed Control
Turn control clockwise to increase wire
feed speed. (see weld parameter chart in
welding power source or Sections 4-2 and
4-3, as applicable).
MADE IN
V
VOL TAGE
TRIGGEROVER TEMPPOWER
5
2Voltage Control
Turn control clockwise to increase voltage
(see weld parameter chart in welding
power source or Sections 4-2 and 4-3, as
applicable).
ON
3
OFF
4
3Power Switch
4Over Temperature Light
5Gun Trigger Receptacle
Ref. 203 498
OM-1324 Page 19
4-2.Weld Parameter Chart For 115 VAC Model
Selecting Wire, Gas and Control Settings
N o te :1 . S ett ing s ar e ap p r o x im ate. A d j ust as r eq u ir ed .
2. ”––” M eans not recom m ended.
What Material
You a re W e lding
Steel
Stainless
Steel
Suggested
Wire Types,
Polarity
S o lid Wire
(or Hard)
ER70S –6
(DCEP)
S o lid Wire
(or Hard)
ER70S –6
(DCEP)
Flux C ore
E71T–11
(DCEN )
Stainless
Steel
(DCEP)
Sugge sted
Shielding Gases
(
Flow R ate of 20–30 cfh
C
Gas Mixture
2
5
75% Ar / 25% CO
(Ar / C O2produces less
spa tte r – better overall
appearance)
100% CO
N o S h ielding G as
required. G ood for w indy
or o utdoor applications.
May require an oversized
tip for improved feedibility .
Tri–Mix
90% He / 7.5% Ar / 2.5% CO
2
2
)
Wire Size
(
Diameters
.0 2 4 ” (0.6 m m )
.0 3 0 ” (0.8 m m )
.0 3 5 ” (0.9 m m )
.0 2 4 ” (0.6 m m )
.0 3 0 ” (0.8 m m )
.0 3 5 ” (0.9 m m )
.0 3 0 ” (0.8 m m )
.0 3 5 ” (0.9 m m )
.0 4 5 ” (1.2 m m )
.0 3 0 ” (0.8 m m )
2
)
OM-1324 Page 20
Select Voltage and W ire Speed Based on Thickness of M etal Being W elded
Num ber on left of slash
is Voltage Knob Setting.
3/16”
(
4.8 mm
(
––
–––
––
–
––
––
––
)
3.2 m m)
7 / 80
8 / 70
7.5 / 65
1/8”
7 / 70
8 / 75
8 / 75
9 / 55
9 / 70
9 / 60
5 / 60
5 / 60
6 / 60
16 ga.
1.6 mm )
(
3 / 55
3.5 / 55
4 / 45
4 / 55
3.5 / 60
6 / 50
3 / 40
3 / 40
––
Num ber on right of slash
is W ire Speed Knob Setting.
20 ga.
(
0.9mm)
2.5 / 40
2.5 / 40
2 / 25
3 / 40
2 / 40
3 / 40
––
––
––
24 ga.
(
0.8 m m)
2 / 30
2 / 35
––
––
––
––
––
––
––
9 / 70
5 / 45
4.5 / 40
––
––
203 501
OM-1324 Page 21
4-3.Weld Parameter Chart For 230 VAC Model
Selecting Wire, Gas and Control Settings
Note:1. Settings are approxim ate. Adj ust as required.
2. ”––” M eans not recom m ended.
W hat M aterial
You are W elding
Steel
Stainless
Steel
Sugge sted
W ire Types,
Polarity
S oli d Wire
(or H a rd )
ER70S–6
(D CE P)
S oli d Wire
(or H a rd )
ER70S–6
(D CE P)
Flux Core
E71T–11
(DCEN)
Stainless
Steel
(D CE P)
Sugge sted
Shie lding Ga ses
(
Flow R ate of 20 –30cfh
C
Gas Mixture
2
5
75% Ar / 25% C O
(A r / CO2produces less
sp a tter – better overall
appearance)
100% C O
N o Shield ing Gas
required. G ood for w indy
or outdoor applications.
May require an oversized
tip for im proved feedibility.
Tri–Mix
90% He / 7.5% A r / 2.5% C O
2
2
)
WireSize
(
Diameters
.024” (0 . 6m m )
.030” (0 . 8m m )
.035” (0 . 9m m )
.024” (0 . 6m m )
.030” (0 . 8m m )
.035” (0 . 9m m )
.030” (0 . 8m m )
.035” (0 . 9m m )
.045” (1 . 2m m )
.030” (0 . 8m m )
.035” (0 . 9m m )
2
)
OM-1324 Page 22
Se lect V oltage a nd W ire Spe ed Based on Thickne ss of M e ta l Be ing W e lded
Num ber on left of slash
is V olt ag e Kn o b Sett in g .
1/4”
(
6.4 m m
8 / 90
8 / 80
8 / 75
––
9.5 / 70
6.5 / 70
8 / 80
8 / 70
5 / 70
)
3/16”
(
4.8 m m
8 / 90
5 / 75
5 / 75
8 / 85
4.5 / 70
5.5 / 70
6 / 80
6 / 75
5 / 60
Numberonrightofslash
is W ire Speed Knob Setting.
1/8”
)
(
3.2 mm
)
4 / 75
4 / 70
3.5 / 75
4 / 70
3.5 / 60
4 / 70
5 / 50
4 / 70
4 / 50
16 ga.
(
1.6 m m
3 / 70
2.5 / 55
3 / 70
2 / 70
2.5 / 55
3 / 55
3 / 40
3 / 45
3.5 / 40
20 ga.
)
(
0.9 mm
)
2 / 45
1.5 / 60
2 / 60
1.5 / 60
1.5 / 45
1.5 / 40
––
––
––
24 ga.
(
0.8 mm
1 / 50
1.5 / 45
––
––
––
––
––
––
––
)
––
––
7 / 75
7 / 75
4 / 65
5 / 70
3.5 / 45
4.5 / 40
2.5 / 30
––
––
––
203 501
OM-1324 Page 23
SECTION 5 – MAINTENANCE &TROUBLESHOOTING
5-1.Routine Maintenance
Y Disconnect power before maintaining.
3 Months
Replace
unreadable
labels.
6 Months
Blow out or
vacuum inside.
During heavy
service, clean
monthly.
Or
5-2.Overload Protection
Repair or
replace
cracked
weld cable.
1
Clean and
tighten weld
terminals.
1Circuit Breaker CB1
CB1 protects unit from overload. If
CB1 opens, unit shuts down.
Reset breaker.
802 441
5-3.Drive Motor Protection And Tip Saver/Short Circuit Protection
A. Drive Motor Protection
Drive motor protection circuit protects drive motor from overload. If drive motor becomes inoperative, release gun
trigger and wait until protection circuit resets allowing drive motor to feed wire again.
B. Tip Saver/Short Circuit Protection
The tip saver/short circuit protection extends contact tip life and protects internal components from damage. If contact
tip is shorted to workpiece, the unit shuts down the welding output, but the fan continues to run. To resume operation,
release gun trigger to reset unit. If the contact tip has stuck to the workpiece, release gun trigger, turn off unit, and
remove contact tip from workpiece. Check contact tip and replace if damaged. Turn on unit to continue operation.
OM-1324 Page 24
5-4.Changing Drive Roll Or Wire Inlet Guide
1
2
3
.024 Groove.030/.035 Groove
1Inlet 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.
2Drive Roll
The drive roll consists of two differ-
ent sized grooves. The stamped
markings on the end surface of the
drive roll refers to the groove on t he
opposite side of the drive roll. The
groove closest to the motor shaft is
the proper groove to thread (see
Section 3- 11).
3Retaining Pin
T o secure drive roll, locate open slot
and push drive roll completely over
retaining pin, then rotate drive roll
20° (1/4 turn) to closed slot.
Stamped .024
Stamped .030/.035
5-5.Replacing Gun Contact Tip
802 984
Y Turn Off power before
replacing contact tip.
1Nozzle
2Contact Tip
Cut off welding wire at contact tip.
Remove nozzle.
Remove contact tip and install new
contact tip. Reinstall nozzle.
Tools Needed:
2
1
Ref. 802 399-A
OM-1324 Page 25
5-6.Cleaning Or Replacing Gun Liner
Y Disconnect gun from unit.
Head Tube
Remove nozzle, contact tip,
adapter, gas diffuser, and wire
outlet guide.
8 mm
Tools Needed:
8 mm / 10 mm
10 mm
Lay gun cable out straight
before installing new liner.
Blow out gun casing.
Remove liner.
To Reassemble Gun:
Install and tighten new liner.
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.
OM-1324 Page 26
Ref. ST-802 399-A
5-7. Replacing Switch And/Or Head Tube
1
Remove handle
locking nut.
4
Secure head
tube in vice.
Y Turn Off welding power source
/wire feeder and disconnect gun.
3
Slide handle.
2
Remove switch housing. Install new switch and
connect leads (polarity is not important). Reassemble in reverse order. If replacing head tube,
continue t o end of figure.
6
Tools Needed:
5
Loosen jam nut.
Remove from vice
and turn head tube
out by hand.
Hand-tighten head tube into cable connector.
8
Remove from vice. Reposition handle and install
switch housing. Secure with handle locking nut.
7
Place head tube in vice and tighten until
nuts are tight.
19 mm
Ref. ST-800 795-C
OM-1324 Page 27
5-8.Troubleshooting Table
TroubleRemedy
No weld output; wire does not feed; fan
does not run.
Secure power cord plug in receptacle (see Section 3-7).
Replace building line fuse or reset circuit breaker if open.
Place Power switch in On position (see Section 4-1).
Reset welding power source circuit breaker if open.
No weld output; wire does not feed; fan
motor continues to run.
No weld output; wire feeds.
Low weld output.Connect unit to proper input voltage or check for low line voltage.
Electrode wire feeding stops during
welding.
Thermostat TP1 open (overheating). Allow fan to run with gun trigger switch off; thermostat closes when
unit has cooled (see Section 2-2).
Secure gun trigger leads (see Section 3-1).
Connect work clamp to get good metal to metal contact.
Replace contact tip (see Section 5-5).
Check for proper polarity connections (see Section 3-5).
Check thumbscrew securing gun end to feed head adapter and tighten if necessary.
Place voltage switch in desired position (see Section 4-1).
Straighten gun cable and/or replace damaged parts.
Adjust drive roll pressure (see Section 3-11).
Change to proper drive roll groove (see Section 5-4).
Readjust hub tension (see Section 3-10).
Replace contact tip if blocked (see Section 5-5). Oversized tip may be required for some wires.
Clean or replace wire inlet guide or liner if dirty or plugged (see Section 5-4 or Section 5-6).
Replace drive roll or pressure bearing if worn or slipping (see Section 5-4).
Secure gun trigger leads or repair leads (see Section 3-1).
Check and clear any restrictions at drive assembly and liner (see Section 3-11 or Section 5-6).
Release gun trigger and allow gun and motor protection circuitry to reset.
Have nearest Factory Authorized Service Agent check drive motor.
OM-1324 Page 28
SECTION 6 – ELECTRICAL DIAGRAM
Figure 6-1. Circuit Diagram For 115 VAC Model
203 765
OM-1324 Page 29
OM-1324 Page 30
203 794
Figure 6-2. Circuit Diagram For 230 VAC Model
SECTION 7 – MIG WELDING (GMAW) GUIDELINES
7-1.Typical MIG Process Connections
Regulator/
Flowmeter
Wire Feeder/
Power Source
Y Weld current can damage
electronic parts in vehicles.
Disconnect both battery
cables before welding on a
vehicle. P l a c e w o r k c l a m p a s
close t o the weld as possible.
Shielding Gas
Gas
Gun
Work Clamp
Workpiece
light mig 5/967 / Ref. 802 982
OM-1324 Page 31
7-2.Typical MIG Process Control Settings
NOTE
These settings are guidelines only. Material and wire type, joint design, fitup,
position, shielding gas, etc. affect settings. Test welds to be sure they comply to
specifications.
Welding wire is energized when gun trigger is pressed. Before lowering helmet and
pressing trigger, be sure wire is no more than 1/2 in (13 mm) past end of nozzle,
and tip of wire is positioned correctly on seam.
1
2
5
4
0°-15°
90°90°
End View Of Work AngleSide View Of Gun Angle
GROOVE WELDS
1Hold Gun and Control Gun
Trigger
2Workpiece
3
3Work Clamp
4Electrode Extension (Stickout)
1/4 to 1/2 in (6 To 13 mm)
5Cradle Gun and Rest Hand on
Workpiece
45°
45°
End View Of Work AngleSide View Of Gun Angle
FILLET WELDS
0°-15°
S-0421-A
OM-1324 Page 33
7-4.Conditions That Affect Weld Bead Shape
NOTE
Weld bead shape depends on gun angle, direction of travel, electrode extension
(stickout), travel speed, thickness of base metal, wire feed speed (weld current),
and voltage.
10
°
Push
PerpendicularDrag
GUN ANGLES AND WELD BEAD PROFILES
ShortNormalLong
10°
ELECTRODE EXTENSIONS (STICKOUT)
ShortNormalLong
FILLET WELD ELECTRODE EXTENSIONS (STICKOUT)
SlowNormalFast
GUN TRAVEL SPEED
S-0634
OM-1324 Page 34
7-5.Gun Movement During Welding
NOTE
Normally , a single stringer bead is satisfactory for most narrow groove weld joints;
however, for wide groove weld joints or bridging across gaps, a weave bead or
multiple stringer beads works better.
12
3
7-6.Poor Weld Bead Characteristics
1Stringer Bead – Steady
Movement Along Seam
2Weave Bead – Side To Side
Movement Along Seam
3Weave Patterns
Use weave patterns to cover a wide
1Fine Spatter
2Uniform Bead
3Moderate Crater During
Welding
Weld a new bead or layer for each
1/8 in (3.2 mm) thickness in metals
being welded.
4No Overlap
5Good Penetration into Base
Metal
5
OM-1324 Page 35
S-0052-B
7-8.Troubleshooting – Excessive Spatter
Excessive Spatter – scattering of molten metal particles that
cool to solid form near weld bead.
S-0636
Possible CausesCorrective Actions
Wire feed speed too high.Select lower wire feed speed.
Voltage too high.Select lower voltage range.
Electrode extension (stickout) too long.Use shorter electrode extension (stickout).
Workpiece dirty.Remove all grease, oil, moisture, rust, paint, undercoating, and dirt from work surface before welding.
Insufficient shielding gas at welding arc.Increase flow of shielding gas at regulator/flowmeter and/or prevent drafts near welding arc.
Dirty welding wire.Use clean, dry welding wire.
Eliminate pickup of oil or lubricant on welding wire from feeder or liner.
Wrong polarity.Configure polarity as shown in Section 3-5. Always read and follow wire manufacturer’s
recommended polarity, and see Section 3-4.
7-9.Troubleshooting – Porosity
Porosity – small cavities or holes resulting from gas pockets
in weld metal.
S-0635
Possible CausesCorrective Actions
Insufficient shielding gas at welding arc.Increase flow of shielding gas at regulator/flowmeter and/or prevent drafts near welding arc.
Remove spatter from gun nozzle.
Check gas hoses for leaks.
Place nozzle 1/4 to 1/2 in (6-13 mm) from workpiece.
Hold gun near bead at end of weld until molten metal solidifies.
Wrong gas.Use welding grade shielding gas; change to different gas.
Dirty welding wire.Use clean, dry welding wire.
Eliminate pick up of oil or lubricant on welding wire from feeder or liner.
Workpiece dirty.Remove all grease, oil, moisture, rust, paint, coatings, and dirt from work surface before welding.
Use a more highly deoxidizing welding wire (contact supplier).
Welding wire extends too far out of nozzle.Be sure welding wire extends not more than 1/2 in (13 mm) beyond nozzle.
Wrong polarity.Configure polarity as shown in Section 3-5. Always read and follow wire manufacturer’s
OM-1324 Page 36
recommended polarity, and see Section 3-4.
7-10. Troubleshooting – Excessive Penetration
Excessive Penetration – weld metal melting through base metal
and hanging underneath weld.
Excessive Penetration
Possible CausesCorrective Actions
Excessive heat input.Select lower voltage range and reduce wire feed speed.
Wrong polarity.Configure polarity as shown in Section 3-5. Always read and follow wire manufacturer’s
Good Penetration
Increase travel speed.
recommended polarity, and see Section 3-4.
S-0639
7-11. Troubleshooting – Lack Of Penetration
Lack Of Penetration – shallow
fusion between weld metal and
base metal.
Lack of PenetrationGood Penetration
Possible CausesCorrective Actions
Improper joint preparation.Material too thick. Joint preparation and design must provide access to bottom of groove while
maintaining proper welding wire extension and arc characteristics.
Improper weld technique.Maintain normal gun angle of 0 to 15 degrees to achieve maximum penetration.
Keep arc on leading edge of weld puddle.
Be sure welding wire extends not more than 1/2 in (13 mm) beyond nozzle.
Reduce travel speed.
Wrong polarity.Configure polarity as shown in Section 3-5. Always read and follow wire manufacturer’s
recommended polarity, and see Section 3-4.
7-12. Troubleshooting – Incomplete Fusion
Incomplete Fusion – failure of weld metal to fuse completely with
base metal or a preceeding weld bead.
S-0637
Possible CausesCorrective Actions
Workpiece dirty.Remove all grease, oil, moisture, rust, paint, undercoating, and dirt from work surface before
Insufficient heat input.Select higher voltage range and/or adjust wire feed speed.
Improper welding technique.Place stringer bead in proper location(s) at joint during welding.
welding.
Adjust work angle or widen groove to access bottom during welding.
Momentarily hold arc on groove side walls when using weaving technique.
Keep arc on leading edge of weld puddle.
Use correct gun angle of 0 to 15 degrees.
Wrong polarity.Configure polarity as shown in Section 3-5. Always read and follow wire manufacturer’s
recommended polarity, and see Section 3-4.
OM-1324 Page 37
7-13. Troubleshooting – Burn-Through
Burn-Through – weld metal melting completely through base metal
resulting i n holes where no metal remains.
Possible CausesCorrective Actions
Excessive heat input.Select lower voltage range and reduce wire feed speed.
Increase and/or maintain steady travel speed.
S-0640
Wrong polarity.Configure polarity as shown in Section 3-5. Always read and follow wire manufacturer’s
recommended polarity, and see Section 3-4.
7-14. Troubleshooting – Waviness Of Bead
Waviness O f Bead – weld metal that is not parallel and does not cover
joint formed by base metal.
S-0641
Possible CausesCorrective Actions
Welding wire extends too far out of nozzle.Be sure welding wire extends not more than 1/2 in (13 mm) beyond nozzle.
Unsteady hand.Support hand on solid surface or use two hands.
7-15. Troubleshooting – Distortion
Distortion – contraction of weld metal during welding that forces
base metal to move.
Base metal moves
in the direction of
the weld bead.
S-0642
Possible CausesCorrective Actions
Excessive heat input.Use restraint (clamp) to hold base metal in position.
Make tack welds along joint before starting welding operation.
Select lower voltage range and/or reduce wire feed speed.
Increase travel speed.
Weld in small segments and allow cooling between welds.
OM-1324 Page 38
7-16. Common MIG Shielding Gases
This is a general chart for common gases and where they are used. Many different combinations (mixtures) of
shielding gases have been developed over the years. The most commonly used shielding gases are listed in the
following table.
Application
Gas
ArgonAll Positions
Argon + 25% CO
CO
Tri-Mix
1Globular Transfer
2Single Pass Welding Only
390% HE + 7-1/2% AR + 2-1/2% CO
+When ordering a component originally displaying a precautionary label, the label should also be ordered.
To maintain the factory original performance of your equipment, use only Manufacturer’s Suggested
Replacement Parts. Model and serial number required when ordering parts from your local distributor.
+When ordering a component originally displaying a precautionary label, the label should also be ordered.
To maintain the factory original performance of your equipment, use only Manufacturer’s Suggested
Replacement Parts. Model and serial number required when ordering parts from your local distributor.
+When ordering a component originally displaying a precautionary label, the label should also be ordered.
To maintain the factory original performance of your equipment, use only Manufacturer’s Suggested
Replacement Parts. Model and serial number required when ordering parts from your local distributor.
To maintain the factory original performance of your equipment, use only Manufacturer’s Suggested
Replacement Parts. Model and serial number required when ordering parts from your local distributor.
Table 8-1. Optional Drive Rolls
For All Feed Head Assemblies
P ART NO.WIRE DIAMETER INCHES (mm)
202 925.024 (.6) and .030/.035 (.8 and .9)
202 926.030/.035 (.8 and .9) and .045 (1.2 VK Groove)
Table 8-2. Options
PART NO.DESCRIPTIONREMARKS
770 187Running Gear/Cylinder RackFor One Small Gas Cylinder , 100 lb (45 kg)
194 776Small Running Gear/Cylinder RackFor One Small Gas Cylinder, 75 lb (34 kg)
195 605M-10 Replacement Gun10 ft length/.030-.035 wire size
NOTE: If individual parts are required, see Parts List chapter of this manual for part number to order.
OM-1324 Page 45
Notes
Warranty Questions?
Call
1-800-4-A-MILLER
for your local
Miller distributor.
Y our distributor also gives
you ...
Service
Y ou 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.
Effective January 1, 2000
(Equipment with a serial number preface of “LA” or newer)
This limited warranty supersedes all previous Miller warranties and is exclusive with no other
LIMITED WARRANTY – Subject to the terms and conditions
below, Miller Electric Mfg. Co., Appleton, Wisconsin, warrants
to its original retail purchaser that new Miller equipment sold
after the effective date of this limited warranty is free of defects
in material and workmanship at the time it is shipped by Miller.
THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE
WARRANTIES OF MERCHANTABILITY AND FITNESS.
Within the warranty periods listed below, Miller will repair or
replace any warranted parts or components that fail due to
such defects in material or workmanship. Miller must be
notified in writing within thirty (30) days of such defect or
failure, at which time Miller will provide instructions on the
warranty claim procedures to be followed.
Miller shall honor warranty claims on warranted equipment
listed below in the event of such a failure within the warranty
time periods. All warranty time periods start on the date that
the equipment was delivered to the original retail purchaser, or
one year after the equipment is sent to a North American
distributor or eighteen months after the equipment is sent to an
International distributor.
1. 5 Years Parts – 3 Years Labor
* Original main power rectifiers
* Inverters (input and output rectifiers only)
2. 3 Years — Parts and Labor
* Transformer/Rectifier Power Sources
* Plasma Arc Cutting Power Sources
* Semi-Automatic and Automatic Wire Feeders
* Inverter Power Supplies
* Intellitig
* Engine Driven Welding Generators
(NOTE: Engines are warranted separately by
the engine manufacturer .)
3. 1 Year — Parts and Labor
* DS-2 Wire Feeder
* Motor Driven Guns (w/exception of Spoolmate
185 & Spoolmate 250)
* Process Controllers
* Positioners and Controllers
* Automatic Motion Devices
* RFCS Foot Controls
* Induction Heating Power Sources
* Water Coolant Systems
* HF Units
* Grids
* Maxstar 140
* Spot Welders
* Load Banks
* Miller Cyclomatic Equipment
* Running Gear/Trailers
* Plasma Cutting Torches (except APT & SAF
Models)
* Field Options
(NOTE: Field options are covered under True
Bluefor the remaining warranty period of the
product they are installed in, or for a minimum of
one year — whichever is greater.)
4. 6 Months — Batteries
5. 90 Days — Parts
* MIG Guns/TIG Torches
* Induction Heating Coils and Blankets
Miller’s True Blue Limited Warranty shall not apply to:
1. Consumable components; such as contact tips,
cutting nozzles, contactors, brushes, slip rings,
relays or parts that fail due to normal wear.
2. Items furnished by Miller, but manufactured by others,
such as engines or trade accessories. These items are
covered by the manufacturer’s warranty, if any.
3. Equipment that has been modified by any party other
than Miller, or equipment that has been improperly
installed, improperly operated or misused based upon
industry standards, or equipment which has not had
reasonable and necessary maintenance, or equipment
which has been used for operation outside of the
specifications for the equipment.
MILLER PRODUCTS ARE INTENDED FOR PURCHASE
AND USE BY COMMERCIAL/INDUSTRIAL USERS AND
PERSONS TRAINED AND EXPERIENCED IN THE USE
AND MAINTENANCE OF WELDING EQUIPMENT.
In the event of a warranty claim covered by this warranty, the
exclusive remedies shall be, at Miller’s option: (1) repair; or (2)
replacement; or, where authorized in writing by Miller in
appropriate cases, (3) the reasonable cost of repair or
replacement at an authorized Miller service station; or (4)
payment of or credit for the purchase price (less reasonable
depreciation bas e d u p o n a c tual use) upon return of the goods
at customer’s risk and expense. Miller’s option of repair or
replacement will be F.O.B., Factory at Appleton, Wisconsin, or
F.O.B. at a Miller authorized service facility as determined by
Miller. Therefore no compensation or reimbursement for
transportation costs of any kind will be allowed.
TO THE EXTENT PERMITTED BY LAW, THE REMEDIES
PROVIDED HEREIN ARE THE SOLE AND EXCLUSIVE
REMEDIES. I N N O EVENT SHALL MILLER BE LIABLE FOR
DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR
CONSEQUENTIAL DAMAGES (INCLUDING LOSS OF
PROFIT), WHETHER BASED ON CONTRACT, TORT OR
ANY OTHER LEGAL THEORY.
ANY EXPRESS WARRANTY NOT PROVIDED HEREIN
AND ANY IMPLIED WARRANTY, GUARANTY OR
REPRESENTATION AS TO PERFORMANCE, AND ANY
REMEDY FOR BREACH OF CONTRACT TORT OR ANY
OTHER LEGAL THEORY WHICH, BUT FOR THIS
PROVISION, MIGHT ARISE BY IMPLICATION,
OPERATION OF LAW, CUSTOM OF TRADE OR COURSE
OF DEALING, INCLUDING ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR FITNESS FOR PARTICULAR
PURPOSE, WITH RESPECT TO ANY AND ALL
EQUIPMENT FURNISHED BY MILLER IS EXCLUDED AND
DISCLAIMED BY MILLER.
Some states in the U.S.A. do not allow limitations of how long
an implied warranty lasts, or the exclusion of incidental,
indirect, special or consequential damages, so the above
limitation or exclusion may not apply to you. This warranty
provides specific legal rights, and other rights may be
available, but may vary from state to state.
In Canada, legislation in some provinces provides for certain
additional warranties or remedies other than as stated herein,
and to the extent that they may not be waived, the limitations
and exclusions set out above may not apply. This Limited
Warranty provides specific legal rights, and other rights may
be available, but may vary from province to province.
miller_warr 7/00
Owner’s Record
Please complete and retain with your personal records.
Model NameSerial/Style Number
Purchase Date(Date which equipment was delivered to original customer.)
Distributor
Address
City
StateZip
For Service
Call 1-800-4-A-Miller or see our website at www.MillerWelds.com
to locate a DISTRIBUTOR or SERVICE AGENCY near you.
Always provide Model Name and Serial/Style Number.
Contact your Distributor for:
Welding Supplies and Consumables
Options and Accessories
Personal Safety Equipment
Service and Repair
Replacement Parts
Training (Schools, Videos, Books)
Technical Manuals (Servicing Information
and Parts)
Circuit Diagrams
Welding Process Handbooks
Miller Electric Mfg. Co.
An Ill inoi s Tool Works Company
1635 West Spencer Street
Appleton, WI 54914 USA
International Headquarters–USA
USA Phone: 920-735-4505 Auto-A t t ended
USA & Canada FAX: 9 20-735-4134
International FAX: 920-735-4125
European Headquarters –
United Kingdom
Phone: 44 (0) 1204-593493
FAX: 44 (0) 1204-598066
www.MillerWelds.com
Contact the Delivering Carrier for:
For assistance in filing or settling claims,
contact your distributor and/or equipment
manufacturer’s Transportation Department.
PRINTED IN USA 2001 Miller Electric Mfg. Co. 1/01
File a claim for loss or damage during
shipment.
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