Yeswelder YWM-200 User manual

YWM-200
IGBT INVERTER MULTI-PROCESS WELDER (MIG, MAG,
FLUX-CORED, SPOOL GUN COMPATIBLE MIG, STICK, LIFT TIG)
Copyright © YesWelder
OPERATOR’S MANUAL
Aug., 2023

Congratulations on your new YesWelder product! We at YesWelder create quality products at dis-
counted prices to make welding affordable to everyone. To help us serve you better and for further
questions, visit www.yeswelder.com. Thank you for your purchase.

TABLE OF CONTENTS
INSTALLATION ·································································································································5
ACCESSORIES ·································································································································6
DESCRIPTION ·····························································································································7-12
Controls And Settings ··················································································································8-9
Installing The MIG Gun Assembly ································································································10
Gas Cylinder And Regulator Connection ·····················································································10
Installing The Welding Wire ·····································································································10-12
OPERATION ·······························································································································12-25
Performance Data Plate And Duty Cycle ·················································································12-13
Welding Preparation ······················································································································13
Welding Wire Selection ·················································································································14
Gas Selection ································································································································14
Set up for MIG GMTW Welding (GMTW) ················································································14-19
Set up for Flux-Cored Wire (FCAW) Welding ···············································································20
Set up for Lift Arc TIG Welding (GTAW) ·······················································································21
Set up for Stick Welding (SMAW) ····························································································22-23
MAINTENANCE & SERVICING ······································································································24
General Maintenance ····················································································································24
Consumable Maintenance ············································································································24
TROUBLESHOOTING ···············································································································25-30
WIRING DIAGRAM ··························································································································31
SAFETY ············································································································································1-4

- 1 -
SAFETY
THANK YOU FOR SELECTING
A QUALITY PRODUCT BY
YESWELDER.
When this equipment is shipped, the title passes to the pur-
chaser upon receipt by the carrier. Consequently, claims for ma-
terial damaged in shipment must be filed by the purchaser
against the transportation company when the shipment is re-
ceived.
PLEASE EXAMINE THE PACKING BOX AND
EQUIPMENT FOR DAMAGE IMMEDIATELY
SAFETY DEPENDS ON YOU
YESWELDER arc welding and cutting equipment are designed
and built with safety. However, your overall safety can be in-
creased by proper installation and thoughtful operation on your
part. DO NOT INSTALL, OPERATE OR REPAIR THIS EQUIP-
MENT WITHOUT READING THIS MANUAL AND THE
SAFETY PRECAUTIONS CONTAINED THROUGHOUT. And
most importantly, think before you act and be careful.
WARNING
CAUTION
This statement appears where the information must be followed
precisely to avoid serious personal injury or loss of life.
This statement appears where the information must be followed
to avoid minor personal injury or damage to this equipment.
KEEP YOUR HEAD OUT OF THE FUMES.
DON’T get too close to the arc.
Use corrective lenses if neces-
sary to stay a reasonable dis-
tance from the arc.
READ and obey the Safety
Data Sheet (SDS) and the warn-
ing label on all welding materi-
als containers.
USE ENOUGH VENTILATION
or exhaust at the arc, or both, to
keep the fumes and gases from your breathing zone and the
general area.
IN A LARGE ROOM OR OUTDOORS, natural ventilation may
be adequate if you keep your head out of the fumes (See be-
low).
USE NATURAL DRAFTS or fans to keep the fumes away from
your face.
If you develop unusual symptoms, see your supervisor. Per-
haps the welding atmosphere and ventilation system should be
checked.
WEAR CORRECT EYE, EAR &
BODY PROTECTION
PROTECT your eyes and face with welding hel-
met properly fitted and with proper grade of filter
plate (See ANSI Z49.1).
PROTECT your body from welding spatter and
arc flash with protective clothing including
woolen clothing, flame-proof apron and gloves,
leather leggings, and high boots.
PROTECT others from spatter, flash, and glare
with protective screens or barriers.
IN SOME AREAS, protection from noise may be
SPECIAL SITUATIONS
DO NOT WELD OR CUT containers or materials which previ-
ously had been in contact with hazardous substances unless
they are properly cleaned.
DO NOT WELD OR CUT painted or plated parts unless special
precautions with ventilation have been taken. They can release
highly toxic fumes or gases.
Additional precautionary measures:
PROTECT compressed gas cylinders from excessive heat, me-
chanical shocks, and arcs; fasten cylinders so they cannot fall.
BE SURE cylinders are never grounded or part of an electrical
circuit.
REMOVE all potential fire hazards from welding area.
ALWAYS HAVE FIRE FIGHTING EQUIPMENT READY FOR
IMMEDIATE USE AND KNOW HOW TO USE IT.
appropriate.
BE SURE protective equipment is in good condition. Also, wear
safety glasses in work area
AT ALL TIMES.

- 2 -
SAFETY
Read and understand the following safety highlights. For addi-
tional safety information, it is strongly recommended you down-
load free PDF of Standard ANSI Z49.1 from the American Weld-
ing Society.
https://www.aws.org/library/doclib/AWS-Z49-2021.pdf
WARNINGS
CALIFORNIA PROPOSITION 65 WARNINGS
WARNING: Breathing diesel engine exhaust ex-
poses you to chemicals known to the State of Cali-
fornia to cause cancer and birth defects, or other re-
productive harm.
ŸAlways start and operate the engine in a well-ventilated
area.
ŸIf in an exposed area, vent the exhaust to the outside.
ŸDo not modify or tamper with the exhaust system.
ŸDo not idle the engine except as necessary.
For more information go to
www.P65 warnings.ca.gov/diesel
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 §
25249.5 et seq.)
WARNING: Cancer and Reproductive Harm
www.P65warnings.ca.gov
ARC WELDING CAN BE HAZARDOUS. PROTECT
YOURSELF AND OTHERS FROM POSSIBLE SERIOUS
INJURY OR DEATH. KEEP CHILDREN AWAY.
PACEMAKER WEARERS SHOULD CONSULT WITH
THEIR DOCTOR BEFORE OPERATING.
1.a. Turn the engine off before troubleshoot-
ing and maintenance work unless the
maintenance work requires it to be run-
ning.
1.b. Operate engines in open, well-ventilated
areas or vent the engine exhaust fumes
outdoors.
1.c. Do not add the fuel near an open flame
welding arc or when the engine is run-
BE SURE THAT ALL INSTALLATION, OPERATION,
MAINTENANCE AND REPAIR PROCEDURES ARE
PERFORMED ONLY BY QUALIFIED INDIVIDUALS.
FOR ENGINE POWERED
EQUIPMENT.
ning. Stop the engine and allow it to cool before refueling
to prevent spilled fuel from vaporizing on contact with hot
engine parts and igniting. Do not spill fuel when filling tank.
If fuel is spilled, wipe it up and do not start engine until
fumes have been eliminated.
1.d. Keep all equipment safety guards, covers and devices in
position and in good repair. Keep hands,
hair, clothing and tools away from V-
belts, gears, fans and all other moving
parts when starting, operating or repair-
ing equipment.
1.e. In some cases it may be necessary to remove safety
guards to perform required maintenance. Remove guards
only when necessary and replace them when the mainte-
nance requiring their removal is complete. Always use the
greatest care when working near moving parts.
1.f. Do not put your hands near the engine fan. Do not attempt
to override the governor or idler by pushing on the throttle
control rods while the engine is running.
1.g. To prevent accidentally starting gasoline engines while turn-
ELECTRIC AND
MAGNETIC FIELDS MAY
BE DANGEROUS
2.a. Electric current flowing through any conductor causes lo-
calized Electric and Magnetic Fields (EMF). Welding cur-
rent creates EMF fields around welding cables and welding
machines
2.b. EMF fields may interfere with some pacemakers, and weld-
ers having a pacemaker should consult their physician be-
fore welding.
2.c. Exposure to EMF fields in welding may have other health
effects which are now not known.
2.d. All welders should use the following procedures in order to
minimize exposure to EMF fields from the welding circuit:
2.d.1. Route the electrode and work cables together - Se-
cure them with tape when possible.
2.d.2. Never coil the electrode lead around your body.
2.d.3. Do not place your body between the electrode and
workcables. If the electrode cable is on your right
side, the work cable should also be on your right
side.
2.d.4. Connect the work cable to the workpiece as close as
possible to the area being welded.
2.d.5. Do not work next to welding power source.
ing the engine or welding generator dur-
ing maintenance work, disconnect the
spark plug wires, distributor cap or mag-
neto wire as appropriate.
1.h. To avoid scalding, do not remove the radi-
ator pressure cap when the engine is
hot.

- 3 -
SAFETY
ELECTRIC SHOCK
CAN KILL.
3.a. The electrode and work (or ground) cir-
cuits are electrically “hot” when the
welder is on. Do not touch these “hot”
parts with your bare skin or wet clothing.
Wear dry, hole-free gloves to insulate hands.
3.b. Insulate yourself from work and ground using dry insula-
tion. Make certain the insulation is large enough to cover
your full area of physical contact with work and ground.
In addition to the normal safety precautions, if welding
must be performed under electrically hazardous con-
ditions (in damp locations or while wearing wet cloth-
ing; on metal structures such as floors, gratings or
scaffolds; when in cramped positions such as sitting,
kneeling or lying, if there is a high risk of unavoidable
or accidental contact with the workpiece or ground)
use the following equipment:
• Semiautomatic DC Constant Voltage (Wire) Welder.
• DC Manual (Stick) Welder.
• AC Welder with Reduced Voltage Control.
3.c. In semiautomatic or automatic wire welding, the electrode,
electrode reel, welding head, nozzle or semiautomatic
welding gun are also electrically “hot”.
3.d. Always be sure the work cable makes a good electrical
connection with the metal being welded. The connection
should be as close as possible to the area being welded.
3.e. Ground the work or metal to be welded to a good electrical
(earth) ground.
3.f. Maintain the electrode stinger, work clamp, welding cable
and welding machine in good, safe operating condition. Re-
place damaged insulation.
3.g. Never dip the electrode in water for cooling.
3.h. Never simultaneously touch electrically “hot” parts of elec-
trode stingers connected to two welders because voltage
between the two can be the total of the open circuit voltage
of both welders.
3.i. When working above floor level, use a safety belt to protect
yourself from a fall should you get a shock.
3.j. Also see Items 6.c. and 8.
4.a. Use a shield with the proper filter and cover plates to pro-
tect your eyes from sparks and the rays of the arc when
welding or observing open arc welding. Welding shield and
filter lens should conform to ANSI Z87. I standards.
4.b. Use suitable clothing made from durable flame-resistant
material to protect your skin and that of your helpers from
the arc rays.
4.c. Protect other nearby personnel with suitable, non-
flammable screening and/or warn them not to watch the
arc nor expose themselves to the arc rays or to hot spatter
or metal.
ARC RAYS CAN BURN.
FUMES AND GASES
CAN BE DANGEROUS.
5.a. Welding may produce fumes and gases
hazardous to health. Avoid breathing
these fumes and gases. When welding,
keep your head out of the fume. Use enough ventilation
and/or exhaust at the arc to keep fumes and gases away
from the breathing zone. When welding hardfacing (see
instructions on container or SDS) or on lead or cad-
mium plated steel and other metals or coatings which
produce highly toxic fumes, keep exposure as low as
possible and within applicable OSHA PEL and ACGIH
TLV limits using local exhaust or mechanical ventila-
tion unless exposure assessments indicate otherwise.
In confined spaces or in some circumstances, out-
doors, a respirator may also be required. Additional
precautions are also required when welding on galva-
nized steel.
5.b. The operation of welding fume control equipment is af-
fected by various factors including proper use and position-
ing of the equipment, maintenance of the equipment and
the specific welding procedure and application involved.
Worker exposure level should be checked upon installation
and periodically thereafter to be certain it is within applica-
ble OSHA PEL and ACGIH TLV limits.
5.c. Do not weld in locations near chlorinated hydrocarbon va-
pors coming from degreasing, cleaning or spraying opera-
tions. The heat and rays of the arc can react with solvent
vapors to form phosgene, a highly toxic gas, and other irri-
tating products.
5.d. Shielding gases used for arc welding can displace air and
cause injury or death. Always use enough ventilation, espe-
cially in confined areas, to insure breathing air is safe.
5.e. Read and understand the manufacturer’s instructions for
this equipment and the consumables to be used, including
the Safety Data Sheet (SDS) and follow your employer’s
safety practices. SDS forms are available from your weld-
ing distributor or from the manufacturer.
5.f. Also see Item 1.b.

- 4 -
SAFETY
WELDING AND CUTTING
SPARKS CAN CAUSE
FIRE OR EXPLOSION.
6.a. Remove fire hazards from the welding area. If this is not
possible, cover them to prevent the welding sparks from
starting a fire. Remember that welding sparks and hot ma-
terials from welding can easily go through small cracks
and openings to adjacent areas. Avoid welding near hy-
draulic lines. Have a fire extinguisher readily available.
6.b. Where compressed gases are to be used at the job site,
special precautions should be used to prevent hazardous
situations. Refer to “Safety in Welding and Cutting” (ANSI
Standard Z49.1) and the operating information for the
equipment being used.
6.c. When not welding, make certain no part of the electrode cir-
cuit is touching the work or ground. Accidental contact can
cause overheating and create a fire hazard.
6.d. Do not heat, cut or weld tanks, drums or containers until
the proper steps have been taken to insure that such pro-
cedures will not cause flammable or toxic vapors from sub-
stances inside. They can cause an explosion even though
they have been “cleaned”. For information, purchase “Rec-
ommended Safe Practices for the Preparation for Welding
and Cutting of Containers and Piping That Have Held Haz-
ardous Substances”, AWS F4.1 from the American Weld-
ing Society (see address above).
6.e. Vent hollow castings or containers before heating, cutting
or welding. They may explode.
6.f. Sparks and spatter are thrown from the welding arc. Wear
oil free protective garments such as leather gloves, heavy
shirt, cuffless trousers, high shoes and a cap over your
hair. Wear ear plugs when welding out of position or in con-
fined places. Always wear safety glasses with side shields
when in a welding area.
6.g. Connect the work cable to the work as close to the welding
area as practical. Work cables connected to the building
framework or other locations away from the welding area
increase the possibility of the welding current passing
through lifting chains, crane cables or other alternate cir-
cuits. This can create fire hazards or overheat lifting chains
or cables until they fail.
6.h. Also see item 1.c.
6.I. Read and follow NFPA 51B “Standard for Fire Prevention
During Welding, Cutting and Other Hot Work”, available
from NFPA, 1 Batterymarch Park, PO box 9101, Quincy,
MA 022690-9101.
6.j. Do not use a welding power source for pipe thawing.
CYLINDER MAY EXPLODE IF
DAMAGED.
7.a. Use only compressed gas cylinders con-
taining the correct shielding gas for the
process used and properly operating reg-
ulators designed for the gas and pres-
sure used. All hoses, fittings, etc. should
be suitable for the application and main-
tained in good condition.
7.b. Always keep cylinders in an upright position securely
chained to an undercarriage or fixed support.
7.c. Cylinders should be located:
•Away from areas where they may be struck or subjected to
physical damage.
•A safe distance from arc welding or cutting operations and
any other source of heat, sparks, or flame.
7.d. Never allow the electrode, electrode stinger or any other
electrically “hot” parts to touch a cylinder.
7.e. Keep your head and face away from the cylinder valve out-
let when opening the cylinder valve.
7.f. Valve protection caps should always be in place and hand
tight except when the cylinder is in use or connected for
use.
7.g. Read and follow the instructions on compressed gas cylin-
ders, associated equipment, and CGA publication P-l, “Pre-
cautions for Safe Handling of Compressed Gases in Cylin-
ders,” available from the Compressed Gas Association,
14501 George Carter Way Chantilly, VA 20151.
FOR ELECTRICALLY
POWERED EQUIPMENT.
8.a. Turn off the power using the disconnect
switch at the fuse box before working on
the equipment.
8.b. Install equipment in accordance with the U.S. National Elec-
trical Code, all local codes and the manufacturer’s recom-
mendations.
8.c. Ground the equipment following the U.S. National Electri-
cal Code and the manufacturer’s recommendations.

Standard Voltage /Frequency
220V±10% 50/60Hz
110V±10% 50/60Hz
Input Current
I1 max=34A, I1 eff=26.3A
I1 max=50A, I1 eff=38.7A
INPUT-SINGLEPHASEONLY
RATEDOUTPUT-DCONLY
OUTPUT RANGE
OTHER PARAMETERS
PACKING DIMENSIONS
TEMPERATURERANGE
Voltage
220V
110V
Mode
GMAW
SMAW
GTAW
GMAW
SMAW
GTAW
Duty Cycle
60%
100%
60%
100%
60%
100%
60%
100%
60%
100%
60%
100%
Current
200A
158A
180A
139A
200A
155A
160A
123A
145A
112A
160A
124A
VoltsatRated
Current
24V
21.9V
27.2V
25.5V
18V
16.2V
22V
20.1V
25.8V
24.5V
16.4V
15V
Voltage
220V
110V
Mode
GMAW
SMAW
GTAW
GMAW
SMAW
GTAW
Open Circuit
Voltage
62V
Welding
Current Range
30A~200A
20A~180A
10A~200A
30A~160A
20A~145A
10A~160A
Welding
VoltageRange
15.5V~24V
20.8V~27.2V
10.4V~18V
15.5V~22V
20.8V~25.8V
10.4V~16.4V
Machine PowerFactor Efficiency ProtectionClass InsulationClass
0.8 ≥80% IP21S F
YWM-200
Machine
YWM-200
Length Width Height Weight
540mm 360mm 445mm 17.65Kg
OperatingTemperatureRange
-20°C~+50°C(-4°F~122°F)
StorageTemperatureRange
-20°C~+50°C(-4°F~122°F)
TECHNICAL SPECIFICATIONS: YWM-200
INSTALLATION
- 5 -
Read the entire installation section before you start
the installation.
INSTALLATION
WARNIG
ELECTRIC SHOCK can kill.
ŸOnly qualified personnel should per-
form this installation.
ŸOnly personnel reading and under-
standing the YWM-200 Operator’s Man-
ual should install and operate this
equipment.
ŸThe machine must be plugged into a grounded receptacle
per national, local, or other applicable electrical codes.
ŸThe YWM-200 power switch should be in the OFF(“O”) po-
sition when installing the work cable and gun and con-
necting the power cord to input power.
SELECT SUITABLE LOCATION
STACKING
Locate the YWM-200 in a dry place with free clean air circula-
tion to minimize the chance of dirt accumulation that can block
air passages and cause overheating.
YWM-200 cannot be stacked.
TILTING
The machine should be placed on a secure, level surface or a
recommended cart. The equipment may topple over if this re-
quirement is not followed.

ACCESSORIES
1. Welder
2. Work Clamp
3. Electrode Holder
4. V Knurl Groove
Drive Roller: .023"/.0
30" (.030" & .035" on
the machine)
5. W Knurl Groove
Drive Roller: .030" & .035"
6. U Knurl Groove Drive
Roller: .035" & .045"
7. 220V~110V Power Plug
8. 24KD MIG Gun
9. Graphene Feeding Liner
10. Contact Tips (4pieces)
11. Gas Hose
12. Operator’s Manual
- 6 -
11
9
1
8
7
4
56
2
3
12
10

DESCRIPTION
- 7 -
This small portable wire feed welder is capable of MIG (GMAW/
flux-cored (FCAW) welding on steel, mild steel, stainless steel.
The wire feed welder is also capable of STICK welding
(SMAW) and DC lift TIG welding (GTAW).
This machine does not have a built in Gas Solenoid so a one
piece gas valve TIG Torch is required, The gas valve must be
opened manually before welding and closed manually when
welding is completed. The arc is activated using a lift arc tech-
nique.
GMAW (MIG/MAG)
Gas Metal Arc Welding
FCAW(INNERSHIELD OR OUTERSHIELD)
Flux-Cored Arc Welding
SMAW
Stick Arc Welding
GTAW(TIG)
Gas Tungsten Arc Welding
SAFETY PRECAUTIONS
ELECTRIC SHOCK can kill.
ŸDo not touch electrically live parts such as
output terminals or internal wiring.
ŸInsulate yourself from the work and
ground.
ŸAlways wear dry insulating gloves.
FUMES AND GASES
can be dangerous.
ŸKeep your head out of fumes.
ŸUse ventilation or exhaust to remove
fumes from breathing zone.
WELDING SPARKS
can cause fire or explosion
Read entire operation section before operating
the WIRE FEEDER WELDER.
ŸKeep flammable material away.
ŸDo not weld on closed containers.
ARC RAYS can burn eyes and skin.
ŸWear eye, ear and body protection.
WARNING
Observe all safety information
throughout this manual.
COMMON WELDING ABBREVIATIONS
PRODUCT DESCRIPTION (PRODUCT CAPABILITIES)
MIG welding stands for Metal Inert Gas welding and requires a
shielding gas to protect the weld until it cools. Appropriate
shielding gas based on the type of material you are welding
can be purchased separately from your local welding gas dis-
tributor. MIG welding is ideal for welding on thinner and clean
materials when a very clean excellent cosmetic looking weld is
required. An example would be automotive body panels.
Self Shielding Flux-cored Welding does not require a separate
shielding gas to protect the weld since the welding wire has spe-
cial additives known as flux to protect the weld until it cools.
Flux-cored welding is ideal for medium to thicker material and if
welding on painted or rusty steel. Flux-cored welding is also
ideal in outdoor applications where windy conditions might blow
the MIG shielding gas away from the weld. Flux-cored welding
produces a good looking weld but does not produce an excel-
lent weld appearance as MIG welding does.

1. Value Adjustment Knob-Permits selecting different value for output Current, output Voltage, wire feeding speed.
2. Material Selector: 100% CO2 Fe/98% Argon 2% CO2 Stainless Steel/Flux/100% Argon Aluminum.
3. Process Selection Button: Allows the user to toggle between processes Synergic MIG/Manual MIG/Lift TIG/Stick.
4. Color LED Screen: Permits visualization of welding process and parameters such as welding material, wire diameter, output volt-
age and output current or wire feeding speed current.
5. Wire Feed Button-Press the Wire Feed button to feed the wire through the gun assembly.
6. Voltage/Amperage or Wire feeding speed Selector Button: Permits selecting output.
7. Wire Diameter Selector Button: .023"/.030"/.035"/.045".
8. Gun Connection (Euro Connect)-Permits attachment of a MIG welding gun. Ensure the gun is fully seated into the brass recepta-
cle.
9. Wire Drive Polarity Lead-Permits configuring the wire drive to positive or negative polarity by inserting into the positive or negative
receptacle. Ensure connector is tightly locked into place by rotating clockwise.
10. Spool Gun Trigger Connector Receptacle-Plug the 2 pin gun trigger connector into this receptacle.
11. Positive Output Receptacle Permits attaching a work lead, electrode stinger or the center wire drive polarity lead to DC positive
polarity. Rotate clockwise to lock into place.
12. Negative Output Receptacle Permits attaching a work lead, electrode stinger, or the center wire drive polarity lead to DC nega-
tive polarity. Rotate connector clockwise to lock into place.
13. Power Switch-Turns power on and off to the machine.
14. Gas Inlet-Shielding gas connects to this inlet, gas fitting: 5/8"~18 RH.
15. Input Power Cable.
16. Fan.
- 8 -
Controls And Settings
Fe CO2 100%
FLUX
Al
Ar 100%
MANUAL
MIG
STICK
SYNERGIC
MIG
LIFT TIG
.023"
.030"
.035"
.045"
INCHING
MODE V/A/
Fe
Ar 75%
CO2 25%
Ss
Ar 98%
CO2 2%
MATERIAL

17. Wire Spool Spindle and Brake-Holds a 4 inch diameter spool. Use the 2 inch I.D. spindle adapter included with the machine to
use 8 inch diameter spools. The Wing Nut sets the brake friction to prevent the spool from over rotating when the trigger is re-
leased.
18. Wire Drive & Components-Feeds wire from the wire spool through the drive and through the welding gun to the weld.
- 9 -
15 13
14
16
4
5
6
7
1
2
3
8
9
10 11 12
18
17

- 10 -
Installing The MIG Gun Assembly
Gas Cylinder And Regulator Connection
The gas cylinder (not supplied) should be located near the rear of the welder, in a well-ventilated area and securely fixed to
the work bench or to the wall to ensure that it will not fall.
For safety and economy, ensure that the regulator is fully closed (turned counter-clockwise) when not welding and when
fitting or removing the gas cylinder.
ŸTurn the regulator adjustment knob counter-clockwise to ensure the valve is fully closed.
ŸScrew the gas regulator down on the gas bottle valve and tighten.
ŸConnect the gas hose to the regulator, securing with the clip/nut provided.
ŸConnect the other end to the GAS Inlet (14) on the back of the machine.
ŸOpen the cylinder valve, then set the gas flow to approximately 20-30 CFH (cubic ft. per hour) on the regulator.
ŸFor MIG welding: Pull the gun trigger to ensure the shielding gas flows through the gun.
Installing The Welding Wire
ENSURE GAS AND ELECTRICAL SUPPLIES ARE DISCONNECTED. Before proceeding, remove the nozzle and the
contact tip from the gun.
WARNING: ELECTRIC SHOCK CAN KILL! Always turn the Power SWITCH OFF and unplug the welder’s INPUT POWER
CABLE from the AC power source before installing wire. When the gun trigger is depressed, the drive rolls, spool of wire,
wire being fed, and electrode are all electrically live (hot).
8" 4"
AC E D E B C E D E
I
H
J
G
2-inch Spindle
Adapter (For 8" Reel of Wire)
WARNING: Cylinders are highly pressurized. Handle with care. Serious accidents can result from improper handling or
misuse of compressed gas cylinders. Please do not drop the cylinder, knock it over, and expose it to excessive heat,
flames, or sparks. Do not strike it against other cylinders or strike an arc on it.
K L M
ŸAttach the standard MIG welding gun to the EURO CONNECT on the front of the welder. Ensure the gun connector end is seated
fully into the wire drive and tighten the thumbscrew to secure the gun.

- 11 -
ŸOpen the access panel.
ŸUnscrew and remove the wire spool retention cap used for 8-inch spools (A) and store it someplace safe.
ŸRemove the spindle adapter for 8-inch spools (B) and keep it someplace safe.
ŸRemove the nut (C), spring (D), and washers (E).
ŸRemove the outer wrapping from the included spool of wire and then find the leading end of the wire (it goes through a hole in the
outer edge of the spool and is bent over the spool edge to prevent the wire from unspooling) but do not unhook it yet.
ŸPlace the spool on the WIRE SPOOL SPINDLE so that the wire unspools from the bottom, and the spool will rotate counterclock-
wise.
ŸPlace the washer, wire spool, bushing, spring, and nut back.
ŸProceed to the “FEEDING WIRE THROUGH THE MIG GUN” instructions below.
Installing 4-Inch Spool (See Figure For Part Identification):
Feeding Wire Through The Mig Gun:
ŸUnhook the wire and hold the wire end and the spool in one hand. Use the other hand to tighten the nut (C) to some extent so that
when the spool is released, it does not spin freely and uncoils the wire. Tightening the nut too much may cause inconsistent wire
feeding. Leaving it too loose will allow the wire to straighten freely from the spool, leaving a mess of wire in the cabinet.
ŸWhile holding the wire in place, use a wire cutter to cut the bent end of the wire so that only a straight end remains.
ŸHold the wire end in one hand and release the drive roller pressure arm (I) by pulling the pressure arm adjustment knob (G)
toward you. Hold the drive roller pressure arm up off of the drive roller and insert the leading end of the wire into the inlet guide
tube (H). Push the wire across the drive roller (J) and into the gun assembly approximately six inches.
ŸAlign the wire up in the groove of the drive roller and allow the drive pressure arm to drop onto the drive roller. Pull the inner
pressure arm adjustment knob back over the pressure arm and tighten (turn clockwise) the pressure adjusting knob until the
pressure roller applies enough force on the wire to prevent it from slipping out of the drive assembly.
NOTE: Too much pressure will cause wire to feeding problems and may burn out the wire feed motor.
ŸLet go of the wire.
ŸRemove the nozzle (K) and contact tip (L) from the end of the gun assembly (M).
ŸPlug the welder’s INPUT POWER CABLE into the AC power source. Adjust the settings at the front panel per the setup chart on
the welding machine’s inside door according to the wire and workpiece size.
ŸPull the trigger on the MIG gun to feed the wire through the gun assembly. Check if the drive roller is slipping on the wire and
increase pressure on the pressure arm adjustment knob if necessary.
ŸWhen at least an inch of wire sticks out past the end of the gun, release the trigger.
ŸSlide the contact tip (L) over the wire protruding from the end of the gun (M). Screw the contact tip into the end of the gun and
hand tighten securely.
ŸInstall the nozzle (K) on the gun assembly.
ŸOpen the access panel.
ŸUnscrew and remove the wire spool retention cap (A).
Note: If the wire spool retention cap and the spindle adapter for 8-inch spools (B) are not present (the machine was last
used with a 4-inch spool), put the spindle adapter for 8-inch spools back in place.
ŸEnsure all of the components used for a 4-inch spool are still in place. They are necessary for 8-inch spools as well (nut (C), spring
(D), and washers (E)).
ŸRemove the outer wrapping from the spool of wire and then find the leading end of the wire (it goes through a hole in the outer
edge of the spool and is bent over the spool edge to prevent the wire from unspooling) but do not unhook it yet.
ŸPlace the spool on the spindle adapter for an 8-inch spool so that the wire unspools from the bottom, and the spool will rotate
counterclockwise.
Note: Be sure the alignment pin near the base of the spindle adapter for 8-inch spools is inserted in the corresponding
hole on the spool.
ŸThread the wire spool retention cap back in place.
Installing 8-Inch Spool (See Figure For Part Identification):

- 12 -
ŸCut off the excess wire that extends past the end of the nozzle.
ŸFine-tune the wire drive pressure with the pressure arm adjustment knob (G).
ŸTurn the pressure adjustment knob clockwise to increase the driving pressure until the wire seems to feed smoothly without
slipping.
Note: If TOO MUCH pressure is applied, you can crush the wire and create wire feeding problems. If TOO LITTLE pres-
sure is used, the wire will slip on the drive rolls, and no wire will be fed.
ŸWhen the driving pressure is set correctly, there should be no slippage between the wire and the drive roller. But if an obstruction
occurs along the wire feed path, the wire should slip on the drive roller. You can check it by squeezing the wire between two
fingers with moderate force as it comes out of the gun. If this stops the wire from feeding, increase the pressure until the wire
feeds through your fingers without issue.
ŸDouble-check your spool tension: When wire feeding stops, the wire comes off the spool with some curvatures while it should not
relax so much that the wire loosens on the spool. off the curvature the coiled wire naturally reverts to. It should also not relax so
much that the wire begins to loosen on the spool.
KEEP THE GUN STRAIGHT. WHEN FEEDING A NEW WIRE THROUGH THE LINER, MAKE SURE THE WIRE IS CUT
CLEANLY (NO BURRS OR ANGLES) AND THAT AT LEAST 1" FROM THE END IS STRAIGHT (NO CURVES).
FAILURE TO FOLLOW THESE INSTRUCTIONS COULD CAUSE DAMAGE TO THE LINER.
WHEN CHECKING THE CORRECT EXIT OF THE WIRE FROM THE GUN DO NOT BRING YOUR FACE NEAR THE
GUN. YOU MAY RUN THE RISK OF BEING WOUNDED BY THE OUTGOING WIRE. DO NOT BRING YOUR FINGERS
CLOSE TO THE FEEDING MECHANISM WHEN WORKING! THE ROLLS, WHEN MOVING, MAY CRUSH FINGERS.
PERIODICALLY CHECK THE ROLLS. REPLACE THEM WHEN THEY ARE WORN AND COMPROMISE THE
REGULAR FEEDING OF THE WIRE.
Performance Data Plate And Duty Cycle
On the machine, there is a plate that includes all the operating specifications for your new unit. The duty cycle rating of a welding
machine defines how long the operator can weld and how long the welding machine must rest and be cooled. Duty cycle is
expressed as a percentage of 10 minutes and represents the maximum welding time allowed. The balance of the 10-minute cycle is
required for cooling.
For example, a welding machine has a duty cycle rating of 30% at the rated output of 90A. With that welding machine, you can weld
at 90 A output for three (3) minutes out of every 10 min with the remaining seven (7) minutes required for cooling.
The duty cycle of your new welding machine can be found on the data plate affixed to the machine. The picture below shows that
the “X” row lists duty cycle percentages while the “I2” row lists the amp draw corresponding to the duty cycle. Various duty cycles at
other amperages are listed on your data plate.
CORRECT INCORRECT
OPERATION

- 13 -
U0=62V
U1=110V
X
I2
U2
60% 100%
145A 112A
25.8V 24.5V
20A/20.8V~145A/25.8V
U1=220V
X
I2
U2
60% 100%
180A 139A
27.2V 25.5V
20A/20.8V~180A/27.2V
MODEL: YWM-200 S/N:
U1=110V
X
I2
U2
60% 100%
160A 123A
22V 20.1V
U0=62V
U1=110V I1 max=50A
1~50Hz/60Hz
I1 eff=38.7A
U1=220V I1 max=34A I1 eff=26.3A
30A/15.5V~160A/22V
U1=220V
X
I2
U2
60% 100%
200A 158A
24V 21.9V
30A/15.5V~200A/24V
U0=62V
U1=110V
X
I2
U2
60% 100%
160A 124A
16.4V 15V
10A/10.4V~160A/16.4V
U1=220V
X
I2
U2
60% 100%
200A 155A
18V 16.2V
10A/10.4V~200A/18V
ANSI/IEC STD.60974-1
Cooling Mode: Fan Cooling IP21S
Insulation Grade: F
If you exceed the welding machine duty cycle, the thermal protection system will engage, shutting off all welding current output.
After cooling, the thermal protector will automatically reset, and the welding functions can resume. The user needs to know it is the
expected behavior of this machine. However, it would be best if you waited at least ten minutes after the thermal protector engages
before resuming welding. You must do this even if the thermal protector resets itself before the ten minutes is up, or you may
experience less than specified duty cycle performance.
CAUTION: DO NOT REGULARLY EXCEED THE DUTY CYCLE OR DAMAGE TO THE WELDER CAN RESULT.
Internal Thermal Protection
The key to making a good weld is preparation. It includes studying the process and equipment and practicing welding before
attempting to weld the finished product. An organized, safe, ergonomic, comfortable, and well-lit work area should be prepared for
the operator. The work area should be free of all flammables, with a fire extinguisher and a bucket of sand available to smother
potential possible fires.
To properly prepare for welding with your new welder, it is necessary to:
Welding Preparation
ŸRead the safety precautions at the front of this manual.
ŸPrepare an organized, well-lit work area.
ŸProtect the eyes and skin of the operator and bystanders.
ŸAttach the work clamp to the bare metal to be welded, ensuring good contact.
ŸWhen MIG/MAG, Aluminum Welding, or Flux-Cored Arc Welding, ensure that the wire-roller groove in the roller corresponds to the
diameter and type of wire used.
ŸPlug the machine into a suitable power outlet, and recommend NEMAS-50.
ŸCompletely open the gas cylinder valve. Adjust the gas pressure regulator to the correct flow rate. (Not applicable to Stick
welding/SMAW).

EXPOSURE TO A WELDING ARC IS EXTREMELY HARMFUL TO THE EYES AND SKIN. PROLONGED EXPOSURE TO
A WELDING ARC CAN CAUSE BLINDNESS AND BURNS. NEVER STRIKE AN ARC OR BEGIN WELDING UNLESS
YOU ARE ADEQUATELY PROTECTED. WEAR FIRE RESISTANT WELDING GLOVES, HEAVY LONG SLEEVED SHIRT,
CUFFLESS PANTS; HIGH TOPPED SHOES AND A WELDING HELMET.
MIG, MAG, Aluminum Welding (14) This welder can work with solid steel wire from .023"~.035" (0.6~0.9mm) diameter (MIG weld-
ing, “GMAW”) and with .023"~.035" (0.6~0.9mm) diameter flux-cored wire (flux-cored wire welding, “FCAW”), with .023"~.035"
stainless steel wire, with .035"~.045" (0.9~1.2mm) Silicon and Magnesium Aluminum wire.
Note: Only .035" wire available in Synergic Gasless MIG Welding.
METAL GAS NOTE
Stainess Steel 98% Argon + 2% CO2
Argon controls spatter For Stainless,
recommend mix gas, if not available,
100% Argon will work.
- 14 -
Carbon Steel
Aluminum
100% CO2
75% Argon + 25% CO2
100% Argon
Welding Wire Selection
Gas Selection
ŸConnect the MIG gun into the EURO CONNECT SOCKET.
ŸConnect the Wire Drive Polarity Lead (9) to the POSITIVE (+) SOCKET.
ŸConnect the work clamp to the NEGATIVE (-) SOCKET.
ŸEnsure the work clamp has a good connection to the workpiece and is connected on clean, bare metal (not rusty or painted).
ŸLoad the spool of wire inside the cabinet and feed it through the WIRE FEEDER into the gun (see “Installing the Welding Wire”,
page 10).
ŸConnect the gas line to the regulator and connect to the gas cylinder.
ŸPress the gun trigger or inching button (5) to load the wire through the gun.
ŸTurn on the gas cylinder, pull the trigger to check for gas flow and set the flow rate to between 20~30 CFH.
ŸTurn the power source on and select the MIG function with the Manual MIG/Synergic MIG/Lift TIG/Stick selector switch.
ŸSet the welding parameters.
ŸBring the gun close to the workpiece and press the trigger to start welding.
Set up for MIG Welding (GMAW)
Select the appropriate shielding gas by the welded material and wire used. The table below provides you useful instructions:

a. Choosing Synergic MIG Setting
Select Synergic MIG this is a predefined setting based on Gas and wire used. The machine will preselect voltage and amperage
allowing the user to quickly find the best welding parameters.
Simply select the correct wire diameter and gas type that you’re using then dial in your desired wire feed speed for the job. Use
more wire speed for thicker material and less wire speed for thinner material. The Synergic MIG system will auto-adjust the welding
voltage to give you an ideal arc condition while welding.
1. Choose the material and shield gas, Fe 75% Argon 25% CO2/Fe 100% CO2/SS 98% Argon 2% CO2.
2. Select suitable wire size.
3. Adjust the output current with adjustment knob (1), wire feed speed & arc voltage will match automatically.
4. Press selector button (6) to fine tune the auto-adjusted voltage(-5~+5V) to personalize your setting for optimal results. (each 1
value=0.3V, reduce 1.5V~add 1.5V)
5. Press adjustment knob (1) to select welding parameters.
6. Bring the gun close to the workpiece and press the trigger.
1). STP: Set torch operation 2T/4T.
When 2T operation is selected, press trigger Arc starts, release trigger, Arc stops.
When 4T operation is selected, press and release trigger Arc starts, press and release trigger Arc stops.
2). IND: inductance, adjust the inductance from -10 ~ +10% with adjustment knob (1), The effects of the inductance can help
reduce spatter, produce a “softer” arc and help wetting out. There is a wetting-out/softness trade off against penetra-
tion/stiff/arc-force/dig qualities.
3). bbt: burn back time, range from 0~10,This setting isused to adjust how long a wire is electrically energized after the wire
has stopped being fed.
4). rin: the speed of the wire prior to the welding arc being struck. range from 0~10%.
5). hs: hot start, arc start current, range from 0~10%.
- 15 -
VoltageVoltage
Material & Shield Gas
Wire Dia
Amperage Range
110V
Fe 75% Argon 25% CO2
0.6mm .023"
40~160A
0.8mm .030"
43~160A
0.9mm .035"
60~160A
Fe 100% CO2
0.6mm .023"
40~160A
0.8mm .030"
30~160A
0.9mm .035"
70~160A
SS 98% Argon 2% CO2
0.6mm .023"
40~160A
0.8mm .030"
43~160A
0.9mm .035"
60~160A
Al 100% Argon
0.9mm .035"
50~160A
1.2mm .045"
65~160A
220V
Fe 75% Argon 25% CO2
0.6mm .023"
40~200A
0.8mm .030"
43~200A
0.9mm .035"
60~200A
Fe 100% CO2
0.6mm .023"
40~200A
0.8mm .030"
30~200A
0.9mm .035"
70~200A
SS 98% Argon 2% CO2
0.6mm .023"
40~200A
0.8mm .030"
43~200A
0.9mm .035"
60~200A
Al 100% Argon
0.9mm .035"
50~200A
1.2mm .045"
65~200A
How To Set The Welding Parameters:

1). STP: Set torch operation 2T/4T.
When 2T operation is selected, press trigger Arc starts, release trigger, Arc stops.
When 4T operation is selected, press and release trigger Arc starts, press and release trigger Arc stops.
2). IND: inductance, adjust the inductance from -10~+10% with adjustment knob (1), The effects of the inductance can help re-
duce spatter, produce a “softer” arc and help wetting out. There is a wetting-out/softness trade off against penetra-
tion/stiff/arc-force/dig qualities.
3). bbt: burn back time, range from 0~10,This setting isused to adjust how long a wire is electrically energized after the wire
has stopped being fed.
4). rin: feeder speed, range from 0~10%.
5). hs: hot start, arc start current, range from 0~10%.
ŸSelect Manual MIG to allow separate setting for welding parameters such as the wire feed speed and voltage. Choose the
material & shield gas: Fe 75% Argon 25% CO2/Fe 100% CO2/SS 98% Argon 2% CO2/Al 100% Argon.
ŸSelect the wire diameter as the spool loaded.
ŸAdjust wire feeding speed with adjustment knob (1), range from 2~15 m/min.
ŸPress Voltage/Amperage selector button (6) to adjust the voltage to personalize your setting for optimal results, range from
12.5~30V.
ŸPress adjustment knob (1) to select welding parameters.
ŸBring the gun close to the workpiece and press the trigger.
Voltage
Material & Shield Gas
Wire Dia
Wire Feeding Speed
Voltage
110V/220V
Fe 75% Argon 25% CO2
0.6-0.9mm
.023"-.035"
2-15 m/min
12.5-30V
Fe 100% CO2
0.6-0.9mm
.023"-.035"
SS 98% Argon 2% CO2
0.8-0.9mm
.023"-.035"
Al 100% Argon
0.9-1.2mm
.035"-.045"
- 16 -
b. Choosing Manual MIG Setting

Set up for Aluminum Welding with Spool Gun
- 17 -
ŸInstall optional YesWelder LBT150 spool gun into Euro MIG torch connection socket on the front panel, and tighten it. Connect the
Spool Gun control cable to the receptacle and tighten it.
IMPORTANT: When connecting the torch, be sure to tighten the connection. A loose connection can result in the
connector arcing and damaging the machine and gun connector. This type of damage is not covered under warranty.
ŸPlug the 2-pin gun trigger connector into the Spool Gun Trigger Connector Receptacle.
ŸConnect to Wire Drive Polarity (+) Lead to the Positive socket.
ŸConnect the Work Clamp into the Negative (-) socket.
ŸConnect the gas line to the regulator and connect to the gas cylinder with 100% Argon shielding Gas.
Ÿwith 100% Argon shielding Gas.
ŸPush the Cover Release clip on the spool gun to unlock the wire housing cover.
ŸPlace the spool of welding wire on the spool holder, correctly putting the parts back on. (Note: the tensioner part needs to remove
first, and remember to put it back.)
ŸHold and snip the wire. (IMPORTANT: wire can uncoil quickly without an appropriate holding)
ŸPut the wire into the groove of the drive roller, and feed it through the outlet guide tube into the torch. Ensure the wire being used
complies with the size of the roller groove.
ŸAdjust the spool holder’s tension to enable a smooth and stable wire feeding.
ŸRemove the gas nozzle and contact tip from the welding torch.
ŸPull the trigger to feed the wire until it exits the contact tip holder.
ŸInstall a correct-sized contact tip, screw the contact tip into the tip holder of the torch, and tighten it up.
ŸInstall the gas nozzle to the torch head and close the wire spool cover.
ŸTurn the power source on and choose the Manual MIG function with the selector button (3).
ŸPress Menu button and select weld spec with Syn off.
ŸChoose the material, Aluminum with the selector button (2).
ŸSet gun selector toggle switch to Spool Gun inside the wire feeding door.
ŸTurn on the gas cylinder valve and set the flow rate to between 20~30 CFH.
ŸSet the welding parameters and begin aluminum welding.