WARPP WS-200 User manual

DC INVERTER TIG
WELDING MACHINE WS-200
INSTRUCTION MANUAL
WARPP ENGINEERS PVT. LTD.
B-1005, Western Edge II, Near Metro Mall, Off. Western
Express Highway, Borivali (E), Mumbai-400 066.
Tel: [phone]/74. Fax: [phone].
Email:[email protected] Web Site: www.warpp.co.in

· -1-
CONTENTS
1. Contents ····································································································································································· 1
2. Safety warning ··························································································································································· 2
3. Machine description ················································································································································· 3
4. Technical parameters table ······································································································································ 4
5. Installation instruction ············································································································································· 5
6. Panel function instruction ······································································································································· 6
7. Operation instruction ··············································································································································· 7
8. Notes or preventive measures·································································································································· 8
9. Questions to be run into during welding ··············································································································· 9
10. Maintenance ···························································································································································· 10
11. Notes before checking ··········································································································································· 11
12. Troubleshooting and fault finding ·························································································································· 12

· -2-
SAFETY WARNING
On the process of welding or cutting, there will be possibility of injury, so please take protection
into consideration during operation. For more details please review the Operator Safety Guide,
which complies with the preventive requirements of the manufacturer.
Electric shock——May lead to death ！！
zSet the earth fitting according to applying standard.
zForbidden to touch the bare electric parts and electrode with uncovered skin, wet gloves or clothes.
zMake sure you are insulated from the ground and the workshop.
zMake sure you are in safe position.
Gases and fumes——May be harmful to health!
zKeep your head out of the gases and fumes.
zWhen arc welding, ventilators or air extractors should be used to avoid breathing gases.
Arc rays——Harmful to your eyes, burn your skin.
zWear suitable protective mask, light filter and protective garment to protect eyes and body.
zPrepare suitable protective mask or curtain to protect looker-on.
Fire
zWelding spark may cause fire, make sure there is no tinder stuff around the welding area.
Noise——Excessive noises will be harmful to hearing.
zUse ear protector or others means to protect ear.
zWarn looker-on that noise is harmful to hearing.
Malfunction——When trouble happens, contact with authorized professionals.
zIf trouble happens during installation and operation, please follow this manual instruction to check up.
zIf you fail to fully understand the manual, or fail to solve the problem with the instruction, you should contact the
suppliers or the service center for professional help.
WARNING！
Creepage-protecting switch should be added when using the machine！！！

· -3-
MACHINE DESCRIPTION
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 100 KHz, 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 electric welding. Its transfer efficiency is above 85%.
Thanks for purchasing our products and looking forward to your precious advice, we will try our best to perfect our
products and service.
WARNING！
The machine is mainly used in industry. It will produce radio wave, so the worker should make fully
preparation for protection.

· -4-
TECHNICAL PARAMETERS TABLE
Model
Parameters WS 200
Power voltage(V) single phase
AC220V±15%
Frequency（Hz）50/60
Rated input current（A）30.8
Output current.（A）10～200
Rated working volt.（V）18
No-load volt.（V）56
Force adjustment（A）——
Duty cycle（%）60
No-load loss （W）40
Arcing way HF
Efficiency （%）80
Power factor 0.73
Insulation grade F
Housing protection grade IP21
Weight（Kg）9
Dimensions （mm）395×153×301

· -5-
INSTALLATION INSTRUCTION
The machine 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 we suggest you to use configured length.
1. Make sure intake of the machine not blocked or covered, lest cooling system could not work.
2. Make good connection of shielded gas source. Gas supply passage includes cylinder, argon decompress flow
meter and pipe. Connecting part of pipe should used hoop or other things to fasten, lest argon leaks out and
air gets in.
3. Use inducting cable whose section is not less than 6 mm² to connect the housing to the ground. The way is
from the ground-connecting screw at the back to the earth device.
4. 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 pulse arc 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.
5. Put the fastening plug of the cable to fastening socket of “+”
polarity at the front panel, fasten it clockwise, and the earth
clamp at the other terminal clamps the work piece.
6. According to input voltage grade, connect power
cable with power supply box of relevant voltage
grade. Make sure so mistake and make sure the
voltage difference among permission range. After the
above job, installation is finished and welding is
available.
WARNING！
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 power source.
Earth Clamp
TIG Torch
Electrode Holder
Workpiece
Power Supply
(single phase~220V)
Installation Instruction of WS 200
Gas
Cylinder

· -6-
PANEL FUNCTION INSTRUCTION
Front Panel
1.Powerswitch
2.Powerindicatorled
3.Abnormalindicatorled
4. Welding current adjustment
5.MMA/TIGswitch
6.Positiveoutputterminal
7.Torchswitchsocket
8. Gas-electricity system output terminal
9.Negativeoutputterminal

· -7-
OPERATION INSTRUCTION
TIG Welding Description
1. Turn on the power switch of front panel, digital current meter is normal, fan begins torun.
2. Turn on argon switch, and adjust gas pressure to rated value.(refer to flow table).
3. Press 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 the torch. NOTES: If the first time welding, you should press switch for a few
seconds before welding, until all the air in the gas passage is removed, and then start to weld. When you stop
welding, argon will still flow out for a few seconds, Which is designed to guarantee that weld spot is protected before
cooling down. So when the electric arc stops, keep the welding position for a while and then move the torch.
4. Choose the “pulse alter switch” according to the need. When the switch is on the down position, there is no pulse,
while between down and up position, there is middle frequency pulse (200Hz), while on the up position, there is low
frequency pulse 2Hz).
5. Adjust the switch of the Current Down Slope Adjustment according to the request of the work piece and welding.
6. Set suitable welding current according to the thickness of work piece and process demand.
7. 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.
Sticking Description
1. Turn on the power switch on the front panel, and the fan begins to work.
2. Make sure function switch of front panel is on “down” position that is sticking. When welding jaw nips welding rod, it
begins to work.
3. According to work piece’s thickness, position, craftwork state, choose suitable welding current.
WARNING:
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.

· -8-
NOTES OR PREVENTIVE MEASURES
1. Environment
1）The machine can perform in environment where conditions are dry with a dampness level of max 90%.
2）Ambient temperature is between -10 to 40 degrees centigrade.
3）Avoid welding in sunshine or drippings. Do not let water enter the gas
4）Avoid welding in dust area or the environment with corrosive gas.
5）Avoid gas welding in the environment with strong airflow.
2. 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.
1) 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.
2) 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.
3) 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.
4) There is a grounding screw behind welding machine, with a grounding marker on it. Before operation, welding
crust must be grounded reliable with cable which section is over 6 square millimeter, in order to prevent from
static electricity, and accidents because of electricity leaking.
5) If welding time is exceeded duty cycle limited, welding machine will stop working for protection. Because
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.

· -9-
QUESTIONS TO BE RUN INTO DURING WELDING
Fittings, welding materials, environment factor, supply powers maybe have something to do with welding. User must try
to improve welding environment.
A. Black welding spot:
——Welding spot is not prevented from oxidizing .User may check as following:
1. 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.
2. 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 min 3L/min.
3. Check if torch is in block.
4. If gas circuit is not air-tight or gas is not pure can lower welding quality.
5. If air is flowing powerfully in welding environment, that can lower welding quality.
B. Arc-striking is difficult and easy to pause:
1. Make sure quality of tungsten electrode is high.
2. 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.
C. 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.
D. Current is not stabilizing when machine is being operated:
It has something with factors as following:
1. Electric wire net voltage has been changed.
2. There is harmful interference from electric wire net or other equipment.
E. When use MMA welding, too much spatter:
1. Maybe current is too big and stick’s diameter is too small.
2. 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.

· -10-
MAINTENANCE
WARNING：
Power must be turned off for all checking and maintenance, before opening the housing, make sure
the power plug is disconnected.
1. Remove dust by dry and clean compressed air regularly, if welding machine is operated in environment where is
polluted with smokes and polluted air, the machine need remove dust every month.
2. Pressure of compressed air must be inside the reasonable arrangement in order to prevent damaging to small
components of inner-machine.
3. Check inter circuit of welding machine regularly and make sure the cable .Circuit is connected correctly and
connectors are connected tightly (especially insert connector and components). If scale and loose are found, please
give a good polish to them, then connect them again tightly.
4. Avoid water and steam enter into inner-machine, if they enter into machine, please dry inner-machine then check
insulation of machine.
5. If welding machine will not be operated for long time, it must be put into packing box and stored in dry environment.
NOTES BEFORE CHECKING
WARNING!
Blind experiment and careless repair may lead to more problems and make formal check and
repair more difficult. When the machine is electrified, the bared parts contain life-threatening
voltage. Any direct and indirect touch will cause electric shock, and severe electric shock will lead
to death.
WARNING！
Connected welding machine to dynamotor directly will damage machine. The heavy voltage
pulse which is produced by dynamotor will burn out machine when machine connected
to dynamotor, only can use asynchronous dynamotor whose frequency and voltage both are
steady. Because of connecting welding machine to dynamotor directly lead to damage
and malfunction, which is not in guarantee.

· -11-
NOTICE: In the period of guarantee maintenance, if user makes wrong check and repair for malfunction
of welding/cutting machines without our permission, the free maintenance guarantee offered will be invalid
TROUBLESHOOTING AND FAULT FINDING
Notes: The following operations must be performed by qualified electricians with valid certifications. Before
maintenance,please contact with us for professional suggestion.
Fault symptom Remedy
Power indicator is not lit, fan does
not work and no welding output
1. Power switch is out of work.
2. Check if electrify wire net (which is connected to input cable) is in work.
3. Check if input cable is out of circuit.
Power indicator is lit ,fan does not
work or revolve several circles ,no
welding output.
1. Maybe connect wrong to 380V power cause machine is in protection circuit,
connect to 220V power and operate machine again.
2. 220V power is not stable,(input cable is too slender)or input cable is connected to
electrify wire net cause machine is in protection circuit .Add the section of cable
and tighten input connector firmly .Turn off machine 2-3 minutes then turn on it
again.
3. Cable is loosed from switch to power panel, tighten them again.
4. Turn on and turn off power switch constantly in short time cause machine is in
protection circuit Turn off machine 2-3 minutes then turn on it again.
5. Main circuit 24V relay of power panel is not close or has damaged. Check 24V
power source and relay. If relay has damaged replace it with same model.
Fan is working, indicator is not lit
and sound of HF arc-striking can not
be heard, wiping welding can not
strike arc.
1. Positive and negative electrodes of VH-07 insert component voltage should be
about DC308v from power panel to MOS board.
2. There is a green indicator in auxiliary power of MOS board, if it is not on, auxiliary
power is out of work. Check fault spot and connect with seller.
3. Check if connector is poor contact.
4. Check control circuit and find out reasons or connect with seller.
5. Check if control cable of torch is broken.
Abnormal indicator is not on, sound
of HF arc-striking can be heard, but
there is no welding output.
1. Check if torch cable is broken.
2. Check if grounding cable is broken or not connected to welding piece.
3. Output terminal of positive electrode or torch electrify is loosed from
inner-machine.
Abnormal indicator is not lit, sound
of HF arc-striking can not be heard,
wiping welding can strike arc.
1. Primary cable of arc-striking transformer is not connected to power panel firmly,
tighten it again.
2. Arc-striking tip is oxidized or too far, give a good polish to it or change it is about
1 mm between arc-striking tip.
3. Switch (sticking/argon-arc welding) is damaged, replace it.
4. Some of HF arc-striking circuit components is damage, find out and replace it.

· -12-
Abnormal indicator is lit but there is
no welding output.
1. Maybe it is overheated protection, please close machine first, then turn on the
machine again after abnormal indicator is out.
2. Maybe it is overheated protection, wait for 2-3 minutes (argon-arc welding does
not has overheated protection function.)
3. Maybe inverter circuit is in fault, please pull up the supply power plug of main
transformer which is on MOS board (VH-07 insert which is near the fan) then
open the machine again.
4. If abnormal indicator is still lit ,close machine and pull up supply power plug of HF
arc-striking power source (which is near the VN-07 insert of fan ),then open
machine:
5. If abnormal indicator is still lit, some of MOSFET of MOS board is damaged, find
out and replace it with same model.
6. If abnormal indicator is not lit, rise transformer of HF arc-striking circuit is
damaged, replace it.
7. If abnormal indicator is not lit.
8. Maybe transformer of middle board is damage, measure inductance value and Q
value of main transformer by inductance bridge (L=0.9-1.6mH Q>35). If value is
too low, please replace it.
9. Maybe secondary rectifier tube of transformer is damaged, find out faults and
replace rectifier tube with same model.
10.Maybe feedback circuit is broken.
Output current is not stabilizing or
out of potentiometer control and
sometime is high, sometime is low.
1. 1K potentiometer is damage, replace it.
2. All kinds of connectors are poor contact, specially inserts etc. please check it.
Sticking spatter is much and
caustic electrode of is difficult .
Electrode is connected wrong, exchange grounding cable and handle cable.

DESCRIPTION PART CODE
TOP PCB PCB-WS200T
MIDDLE PCB PCB-WS200M
BOTTOM PCB PCB-WS200B
ON/OFF SWITCH PSW003
POTENTIOMETER FOR
CURRENT SETTING
(
1K
)
POT003
KNOB FOR POT003 KNOB003
OUT PUT CONNECTOR CABLE
SIDE FASTPLUG001-CM
OUT PUT CONNECTOR
MACHINE SIDE FASTPLUG001
FAN FAN006
SOLONAID VALVE SV101
CAPACITOR CAP-ELE-01
OUT PUT FAST DIODE FAST DIODE-02
MAIN TRANSFORMER MTRAX-MOS-01
MOSFET MOSFET-01
O/P TERMINAL FOR TORCH OUT-TER-CPG-TRH
INPUT BRIDGE MODULE IBDG005
SPARE PART LIST OF WS-20
0