wsm 200M User manual

TIG
WSM 200M WELDING MACHINE
USER MANUAL

Preface
This manual includes hardware description and operation introduction of the equipment. For your and
other people’s safety, please read the manual carefully.
Pay attention
Pay attention to the words after the signs below.
Sign
Description
The words after this sign means there is great potential danger,
which may cause major accident, damage or even death, if it is not
followed.
The words after this sign means there is some potential danger,
which may cause hurt or property lose, if it is not followed.
The words after this sign means there is potential risk, which may
cause equipment fault or break, if it is not followed.
Version
Version YF-TAE-0108, A0. Released at 26th, Oct., 2017.
The contents of this manual are updated irregularity for updating of product. The manual is only
used as operation guide, except for other promises. No warranties of any kind, either express or
implied are made in relation to the description, information or suggestion or any other contents of
the manual.

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CONTENTS
1 Safety Warning ............................................................................................................................... 4
2 Product............................................................................................................................................ 9
2.1 General ................................................................................................................................... 9
2.2 Technical Data........................................................................................................................10
3 Installation......................................................................................................................................11
4 Operation.......................................................................................................................................13
4.1 Front Panel Layout.................................................................................................................13
4.2 Operation Instruction..............................................................................................................14
4.3 Welding Environment and Safety...........................................................................................15
4.4 Welding Problems and Resolution.........................................................................................16
5 Daily Maintenance and Checking..................................................................................................17
6 Trouble Shooting and Fault Finding ..............................................................................................18

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1 Safety Warning
The safety notes listed in this manual is to ensure correct use of the machine and to keep you and
other people from being hurt.
The design and manufacture of welding machine considers safety. Please refer to the safety
warning listed in the manual to avoid accidents.
Different damage would be caused by wrong operation of the equipment as follows. Please read the
user manual carefully to reduce such damage.
Sign
Description
 Any contact of electric parts may cause fatal electric shock orburnt.
 Gas and fumes are harmful to health.
 Operation in narrow space may cause choke.
 Spark and hot workpiece after welding may causefire.
 Bad connected cable may cause fire.
 Incompletion connection of workpiece side circuit may cause fire.
 Never weld on the case of tinder stuff, or it may causeexplode.
 Never weld airtight containers such as slot, pipe etc., or it may
break.
 Arc ray may cause eye inflammation or skin burnt.
 Spark and residue will burn your eyes and skin.
 Toppling over of the gas cylinder will cause bodyhurt.
 Wrong use of the gas cylinder will lead to high-pressure gas
eruptionand cause human hurt.
 Never let fingers, hair, clothes or etc. near the moving parts such
asthe fan.
 The wire shoot out of the torch may stab eyes, face and other naked
parts.
 The machine is portable, never lift it by anyequipment.

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Please follow the rules below to avoid heavy accidents.
˜ Never use the equipment to do other things butwelding.
˜ Follow related regulations for the construction of the input-driven power source, choice of place,
usage of high-pressure gas, storage, configuration, safe-keeping of workpiece after welding and
disposal of waste, etc.
˜ Nonessentials do not enter the welding area.
˜ People using heart pacemaker is not allowed to get close to the welding machine or area
without doctor’s permission. The magnetism created by energizing the welding machine can
have a bad effect to the pacemaker.
˜ Install, operation, check and maintain the equipment by professionpersonnel.
˜ Understanding the contents of the user manual forsafety.
Please follow the rules below to avoid electric shock。
˜ Keep away from any electric parts.
˜ Earth the machine and workpiece by professional personnel.
˜ Cut off the power before installation or checking, and restart 5 minutes later. The capacitance is
chargeable device. Please ensure it has no voltage before start again even if the power source
is cut off.
˜ Do not use wire with inadequate section surface or damage insulation sleeve or even exposed
conductor.
˜ Do ensure well isolation of wire connection.
˜ Never use the device when the enclosure is removed.
˜ Never use broken or wet insulation gloves.
˜ Use firenet when work at high position.
˜ Check and maintain regularly, don’t use it until the broken parts are fixed well.
˜ Turn off the power when not in used.
˜ Follow the national or local related standard and regulations when using the AC welding
machine at narrow or high position.

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Please follow the below notes to avoid fire and explode, etc.
˜ No combustible in welding area.
˜ Keep off combustible when welding.
˜ Keep hot workpiece after welding away from flammable gas.
˜ Do move away the combustible around when weld the dooryard, ground andwall,.
˜ The wire connection of base metal should be as close to the welding place aspossible.
˜ Never weld those facilities with gas pipe or airtightslot.
˜ Put fire extinguisher around the welding area to preventfire.
The gas and fumes are harmful to health, please wear protective device
according to regulations.
˜ Wear exhaust equipment and breathe preventive facilities to prevent gas poisoning orchoke.
˜ Use suggested part exhaust equipment and breathe preventive facilities to prevent hurt or
poisoning by gas and other powder, please.
˜ To prevent oxygen-deficiency, air out the gas-filled room which is full of CO2 and argon on the
bottom, when operating on trunks, boilers, cabins, etc.
˜ Please accept the supervisor’s inspection when operating in narrow space. Air the room and
wear breathe preventive facilities.
˜ Never operate in degrease, washing or spray space.
˜ Using breathe preventive facilities when weld shielded steel for it will cause poisonous dust and
gas.
The arc, spark, residue and noise are harmful to health, please wear
protective appliance.
˜ Eye protection against arc is recommended when welding or supervisewelding.
˜ Please wear preventive spectacles.
˜ Welder’s gloves, welder’s goggles, long sleeve clothes, leather apron, and other standard
protection equipments must be worn for weldingoperation.
˜ A screen to protect other people against the arc must be set in the weldingplace.

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Please follow the notes below to avoid gas cylinder toppling over or
broken.
˜ Use the gas cylinder correctly.
˜ Use the equipped or recommended gaseous regulator.
˜ Read the manual of gaseous regulator carefully before using it, and pay attention to the safety
notes.
˜ Fix the gas cylinder with appropriative holder and other relative parts.
˜ Never put the cylinder under high temperature or sunshineenvironment.
˜ Keep your face away from the gas cylinder exit when openingit.
˜ Put on the gas shield when it is notused.
˜ Never put the torch on the gas cylinder. The electrode can not meet the gascylinder.
Any touch of the switch part will cause injury, please note thefollowing.
˜ Never use the machine when the enclosure isoff.
˜ Install, operate, check and maintain the machine by professionalperson.
˜ Keep your fingers, hair, clothes etc. away from the switch parts such as thefan.
The wire end may deal damage, please note thefollowing.
˜ Never look into the electric conduction hole when checking the wire feeding is normal or not, or
the shooting wire may stab your eyes and face.
˜ Keep your eyes, face or other naked parts away from the end of torch when feeding the wire
manually or pressing the switch.
For better work efficiency and power source maintenance, please note
the following.
˜ Precautions against toppling over.
˜ Never use the welding equipment for pipe thawing.

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Electromagnetic interference needing attention.
˜ It may need extra preventive measures when the equipment is used in particularlocation.
˜ Before the installation, please estimate the potential electromagnetism problems of the
environment as follows.
a)Upper and lower parts of the welding equipments and other nearby power cable, control
cable, signal cable and phone cable.
b) Wireless electric as well as TV radiation and reception equipment.
c) Computer and other control equipments.
d) Safety-recognition equipment etc. Such as supervise of industrial equipments.
e) Health of people around. Such as personnel using the heart pacemaker oraudiphone.
f) Equipments for adjustment and measurement.
g)Anti-disturb capability of other used equipments .Users should ensure these equipments and
the environment are compatible, which may need extra preventivemeasures.
h) Practical state of the welding and other activities.
˜ Users should observe the following dos and don’ts to decrease radiation interference.
a) Connect the welding equipments to the power supplylines.
b) Maintain the welding equipments regularly.
c) The cable should be short enough to be close to each other and theground.
d) Ensure the safety of all the welding metal parts and other partsnearby.
e) The workpiece should be well earth.
f) Shield or protect the other cable and equipments to decrease the effects of disturbances. The
welding equipments can be complete shielded in some special conditions.
˜ Users are responsible for interference due to welding.

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2 Product
2.1 General
Welding machine is a rectifier adopting the most advanced inverter technology.
The development of welding equipment benefits from the appearance of the inverter power supply
theory and components. Inverter arc welding power source utilizes high-power component MOSFET
to transfer 50/60Hz frequency up to 100KHz, then reduce the voltage and commutate, and output
high-power voltage via PWM technology. Because of the great reduce of the main transformer’s
weight and volume; the efficiency increases by 30%. The appearance of inverter welding equipment
is considered to be a revolution for welding industry.
Welding power source can offer stronger, more concentrated and more stable arc. When stick and
workpiece get short, its response will be quicker. It means that it is easier to design into welding
machine with different dynamic characteristics, and it even can be adjusted for specialty to make arc
softer or harder.
TIG welding machine is easy for arc initiation and has the functions of arc initiation current, arc stop
current, welding current, basic value current, current ascending time, current descending time, gas
delay time, continuous adjustment. What’s more, pulse frequency and pulse duty can also be
adjusted independently. It has the characteristics of automatic control of arc initiation, arc stop and
stable arc, which make the best result for shape and inner quality of the welding surface. Its
exclusive design is specially suitable for bicycle industry.
The machine can be for multi-use, and can weld stainless steel, carbon steel, copper and other
color metal, and also can use for traditional electricwelding.
Thanks for purchasing our products and looking forward to your precious advice, we will try our best
to perfect our products and service.
The machine is mainly used in industrial fields. It will cause radio interference if used
indoors. Please take through precaution measures.

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TIG
2.2 Technical Data
Model
Parameters
WSM 200M
Power voltage(V)
single phase AC220V15%
Frequency（Hz）
50/60
Rated input current（A）
28
Output current.（A）
10～200
Rated working volt.（V）
18
No-load volt.（V）
56
Duty cycle（%）
60
Arcing way
HF
Current descending time（S）
0-5S
Pulse frequency（HZ）
LF：0.5-2
MF：50-200
Post time（S）
After descending 3S
No-load loss（W）
40
Efficiency （%）
80
Power factor
0.73
Insulation grade
F
Housing protection grade
IP21
Weight（Kg）
13
Dimensions
（L*W*H mm）
456*204*360

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3 Installation
Equipment is equipped with power voltage compensation equipment. When power voltage fluctuates
between ±15%, of rated voltage, it still can work normally.
When use long cable, in order to prevent voltage form going down, bigger section cable is
suggested. If cable is too long, it may affect the performance of the power system. So cables of
configured length are suggested.
⚫Make sure intake of the machine not blocked or covered, lest cooling system could notwork.
⚫Make good connection of shielded gas source. Gas supply passage includes cylinder, argon
decompress flow meter and pipe. Connecting part of pipe should use hoop or other things to
fasten, lest argon leaks out and air getsin.
⚫Ground the earth wire in the power supply cable.
⚫Correctly connect the arc torch or holder according to the sketch. When use MMA welding:
Make sure the cable, holder and fastening plug have been connected with the ground. Put the
fastening plug into the fastening socket at the “-” terminal and fasten it clockwise. When use
TIG welding: Put the gas-electricity plug of the welding gun to the joint at the front panel, and
fasten clockwise. Put the air switch on the gun to the relevant joint at the front panel, and fasten
the screw.
⚫Put the fastening plug of the cable to fastening socket of “+” terminal at the front panel, fasten it
clockwise, and the earth clamp at the other terminal clamps the work piece.
⚫According to input voltage grade, connect power cable with power supply box of relevant
voltage grade. Make sure there is no mistake and the voltage of power supply does not exceed
permission range. After the above job，installation is finished and welding isavailable.
Before connecting operation please make sure all the power is turned off. The right order is
to connect the welding cable and ground cable to the machine first, and make sure they are
firmly connected and then put the power plug to the powersource.

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Power Supply
Gas
cylinder
Earth clamp
TIG torch
Work piece
Power Supply
Earth clamp
Work piece
Electrode holder
⚫Installation diagram (TIG)
⚫Installation diagram (MMA)

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1
Current meter
2
Abnormal indicator
3
Pulse switch
4
TIG/MMA switch
5
2T/4T switch
6
Power switch
7
Down slope adjustment
8
Pulse frequency adjustment
9
Base current adjustment
10
Peak current adjustment
11
Negative output terminal
12
Gas connector
13
Hand switch socket
14
Positive output terminal
4 Operation
4.1 Front Panel Layout
Note. The image above is for reference only. If any difference with the real machine, please follow
with the real machine.

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4.2 Operation Instruction
⚫TIG Welding Description
a) Turn on the power switch, the digital current meter is working normal, and the fan starts
running.
b) Turn on the argon switch, and set the gas pressure to ratedvalue.
c) Press the switch of torch, electromagnetic valve is started. You will hear the sound of electricity-
releasing HF sparkle and at the same time, argon gets out thetorch.
Note. If welding for the first time, before operating, please press the switch for a few seconds
until all the air in the gas tube is removed. Then, welding could be started.
When stop welding and the electric arc stick out, keep the welding position for a while so that
the weld spot could be protected before cooling down for delaying argon. The post time could
be adjusted for TIG 200S and TIG 200P by pressing the post time button or turning the post
time knob on the front panel.
d) Set the welding current according to the thickness of work piece and processdemand.
e) Keep 2-4mm space between tungsten pole and work piece, press torch control switch, between
electrode and work piece HF electricity is released; After arc initiation, HF sparkle disappears
soon and can start to work.
⚫MMA Welding Description
a) Open power switch of front panel, fan is beginning towork.
b) Make sure function switch of front panel is on “down” position that is sticking. Impulse
changeover switch and knob of current down-slope time will notwork.
c) Make sure welding current is adequate to thickness of work piece
It is forbidden to pull out or put in the cable or connector during the process of welding,
which will threat life safety and damage the machine.

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4.3 Welding Environment and Safety
⚫Environment
a) The machine can perform in environment where conditions are dry with a dampness level of
max 90%.
b) Ambient temperature is between -10 to 40 degrees centigrade.
c) Avoid welding in sunshine or drippings. Do not let water enter thegas
d) Avoid welding in dust area or the environment with corrosive gas.
e) Avoid gas welding in the environment with strong airflow.
⚫Safety norms
Our welding machine has installed protection circuit of over voltage, over current and over heat.
When voltage, output current and temperature of machine are exceeding the rate standard,
welding machine will stop working automatically. Because that will be damage to welding
machine, user must pay attention to following.
a) The working area is adequately ventilated！
Our welding machine is powerful machine, when it is being operated, it generated by high
currents, and natural wind can’t be satisfied with machine cool demands. So there is a fan in
inter-machine to cool down machine. Make sure the intake is not in block or covered, it is 0.3
meter from welding machine to objects of environment. User should make sure the working
area is adequately ventilated. It is important for the performance and the longevity of the
machine.
b) Do not over load！
The operator should remember to watch the max duty current (Response to the selected duty
cycle).Keep welding current is not exceed max duty cycle current. Over-load current will
damage and burn up machine.
c) No over voltage！
Power voltage can be found in diagram of main technical data. Automatic compensation circuit
of voltage will assure that welding current keeps in allowable range. If power voltage is
exceeding allowable range limited, it is damaged to components of machine. The operator
should understand this situation and take preventive measures.
If welding time is exceeded duty cycle limited, welding machine will stop working for protection.
The machine is overheated, temperature control switch is on “ON’’ position and the indicator
light is red. In this situation, you don’t have to pull the plug, in order to let the fan cool the
machine. When the indicator light is off, and the temperature goes down to the standard range,
it can weld again.

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4.4 Welding Problems and Resolution
Fittings, welding materials, environment factor, supply powers maybe have something to do with
welding. User must try to improve welding environment.
⚫Black welding spot.
Welding spot is not prevented from oxidizing .User may check as following:
a) Make sure the valve of argon cylinder is opened and its pressure is enough. Argon cylinder
must be filled up to enough pressure again if pressure of cylinder is below 0.5Mpa.
b) Check if the flow meter is opened and has enough flow .User can choose different flow
according to welding current in order to save gas .But too small flow maybe cause black
welding spot because preventive gas is too short to cover welding spot .We suggest that flow of
argon must be kept min5L/min.
c) Check if torch is in block.
d) If gas passage is not air-tight or gas is not pure can lower weldingquality.
e) If air is flowing powerfully in welding environment, that can lower weldingquality.
⚫Arc-striking is difficult and easy to pause.
a) Make sure quality of tungsten electrode is high.
b) Grind end of the tungsten electrode to taper .If tungsten electrode is not grinded, that will be
difficult to strike arc and cause unstable arc.
⚫Output current not to rated value.
When power voltage departs from the rated value, it will make the output current not matched with
rated value; when voltage is lower than rated value, the max output may lower than rated value.
⚫Current is not stabilizing when machine is being operated.
It has something with factors as following.
a) Electric wire net voltage has been changed.
b) There is harmful interference from electric wire net or other equipment.
⚫When use MMA welding, too muchspatter
a) Maybe current is too big and stick’s diameter is too small.
b) Output terminal polarity connection is wrong, it should apply the opposite polarity at the normal
technique, which means that the stick should be connected with the negative polarity of power
source, and work piece should be connected with the positive polarity. So please change the
polarity.

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5 Daily Maintenance and Checking
⚫Daily maintenance
a) Remove dust regularly with dry compressed air. If the welding machine is used in surroundings
with heavy smoke and polluted air, it is necessary to remove dust at least one time onemonth.
b) The pressure of compressed air shall fall to required level to prevent damage to small
components in the machine.
c) Examine inside electric joints and ensure perfect contact (Especially plugs and sockets). Fasten
the loosing joints. In case of oxidation, remove oxide film with sand paper and connectagain.
d) Prevent water from entering into the machine and prevent the machine from getting moist. If any,
blow and dry. Measure the insulation with megohmmeter to make sure it is qualified touse.
e) If the welding machine is not used for a long time, pack the machine in original package and
store in dry surroundings.
The power shall be cut off completely before all maintenance, repairing works. Make sure to
pull out power plug before opening the case.
⚫Notes before checking
Aimless test and unprofessional repairing may make the problems worse and cause more
defaults. When the power is on, the bare components may be dangerous with high voltage.
Any direct or indirect touch may cause electric shock, even death.
Within the warranty period, if the users handle unprofessionally of the malfunctions by
themselves without permission of manufactory, the free repair guaranteed by the distributors
may not be effective.

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6 Trouble Shooting and Fault Finding
Faults symptom
Solutions
Power indicator is
not lit, fan does not
work and no welding
output
➢Power switch is damaged.
➢Make sure the electric wire net connecting to input cable is working
alright
➢Make sure if input cable has broken circuit.
Power indicator is lit,
fan does not work or
revolve several
circles and stopped,
no welding output
➢Input cable is possibly connected to 380V power, which causes over
voltage protection circuit is starting. Connect input cable to 220V power,
and then restart the machine.
➢Erratic 220V power supply (input cable is too thin and long) or input
cable is connected to electricity network would start overload voltage
protection circuit. Increase section of input cable or tighten input contact.
Turn off machine for 2-3 min and restartit.
➢Cable that connects switch and power board is loosed, tighten itagain.
➢Turn on and off power switch continuously would start overload voltage
protection circuit. Turn off machine for 2-3 min and restartit.
➢24V relay of main return circuit on power board is not closed or
damaged, check 24V power and relay. Replace it with same model
series if it’s damaged.
Fan is working,
abnormal indicator is
not lit, sound of HF
arc striking cannot
be heard, wiping arc
welding can not
strike arc.
➢Measure voltage of positive and negative electrode from power board to
VH-07 insert of MOS board by multimeter, which should reads DC308V.
a) If circuit is broken and silicon bridge is poor contact.
b) If some of four high electrolytic (about 470UF/450V) of power panel
capacitor is leaking.
➢There is a green indicator for auxiliary power on MOS board, if it’s not lit,
auxiliary power is out of work, check fault spot and contact withdealer.
➢Check if all kinds of connect and insert cable is poorcontact.
➢Check if there is some problem in control circuit, contact with dealer.
➢Check if control cable of torch is broken.

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Abnormal indicator is
not lit, sound of HF
arc-striking can be
heard, no welding
output
➢Cable of torch is broken.
➢Grounding cable is broken or not connected to workpiece.
➢There is relaxation between output terminal of positive electrode, gas-
electricity system output terminal and inner machine.
Abnormal indicator is
not lit, sound of HF
arc-striking can not
be heard, wiping
welding can strike
arc.
➢Primary cable of arc-striking transformer is poor contact with power
board, tighten it again.
➢Arc-striking tip is oxidized or distance is too far, get rid of film oxide of
burner or adjust the distance between burners to be1mm.
➢Switch (sticking/argon-arc welding) is damaged, replace it.
➢Some of HF arc-striking circuit components is damage, find out and
replace it.
Abnormal indicator is
lit, no welding output.
➢Overload current protection may start, please turn off machine first, then
restart it after abnormal indicator is off.
➢Overheat protection may start. It will become normal in 2-3min.
➢Inverter circuit may go wrong, please disconnect the power supply plug
of the main transformer on MOS board (close to insert of fan VH-07)
then restart the machine.
(1) If abnormal indicator is still on, turn off machine and disconnect
power supply plug of HF arc-striking power source (close to insert of
fan VH-07), then restart machine:
a) If abnormal indicator is still on, some fieldistors on MOS board
are damaged, find out and replace them with samemodel.
b) If abnormal indicator is off, up-slope transformer of HF arc-
striking circuit is damaged, replace it.
(2) If abnormal indicator is off:
a) Maybe transformer on middle board is damage, measure
primary inductance volume and Q value of main transformer by
inductance bridge (L=0.9-1.6mH Q>35). If value is too low,
please replace it.
b) Maybe secondary rectifier tube of transformer is damaged, find
out faults and replace rectifier tube with samemodel.
➢Maybe feedback circuit is open.

Output current is not
stabilizing or out of
potentiometer control
and sometime is
high ,sometime is low .
➢1K potentiometer is damage ,replace it .
➢All kinds of connectors are poor contact ,specially inserts etc. ,please
check it .
Sticking spatter istoo
much and caustic
electrode of is
difficult .
➢Electrode is connected wrong ,exchange grounding cable and handle
cable .