VEVOR Inverter Welding Machine Instruction Manual

1. Safety Warnings

1.1 ARC Welder Safety Warnings and Precautions

Welding is dangerous and may cause damage to you and others. Take good protection during welding. For details, please refer to the operator safety guidelines in conformity with the accident prevention requirements of the manufacturer.

• Professional training is needed before operating the machine. Use labor protection welding supplies authorized by the national security supervision department. The operator must be special personnel with a valid "metal welding (OFC) operations" operation certificate. Cut off power before maintenance or repair.
• Electric shock—may lead to serious injury or even death. Install earthing device according to the application criteria. Never touch the live parts when skin is bared or wearing wet gloves/clothes. Make sure that you are insulated from the ground and workpiece. Make sure that your working position is safe.
• Smoke & gas—may be harmful to health. Keep the head away from smoke and gas to avoid inhalation of exhaust gas from welding. Keep the working environment in good ventilation with exhaust or ventilation equipment when welding.
• Arc radiation—may damage eyes or burn skin. Wear suitable welding masks and protective clothing to protect your eyes and body. Use suitable masks or screens to protect spectators from harm.
• Improper operation may cause fire or explosion. Welding sparks may result in a fire, so please make sure no combustible materials are nearby and pay attention to fire safety. Have a fire extinguisher nearby, and have a trained person to use it. Airtight container welding is forbidden. Pipe thaw with this machine is forbidden.
• Hot workpiece may cause severe scalding. Do not contact hot workpiece with bare hands. Cooling is needed during continuous use of the welding torch.
• Magnetic fields affect cardiac pacemaker. Pacemaker users should be away from the welding spot before medical consultation.
• Moving parts may lead to personal injury. Keep yourself away from moving parts such as the fan. All doors, panels, covers, and other protective devices should be closed and in place.
• Seek professional help when encountering any difficulties. Consult the relevant contents of this manual if you encounter any difficulties in installation and operation. Contact the service center of your supplier or VEVOR to seek professional help if you still cannot fully understand after reading the manual or still cannot solve the problem according to the manual.

1.2 Read All Instructions Before Using This Welder

• Keep work area clean. Messy places tend to hurt people.
• Observe work area conditions. Do not use machines or power tools in damp or wet places. Do not expose the machine to rain. Keep work area well-lighted. Do not use electrically powered tools in the presence of flammable gases or liquids.
• Keep children away. Children must never be allowed in the work area. Do not let them handle machines, tools, or extension cords.
• Store your equipment. When not in use, tools must be stored in a dry location to avoid rust.
• Always lock up tools and keep them out of the reach of children.
• Do not force the tool. It will do the job better and safer at the rate for which it was intended. Do not use inappropriate attachments in an attempt to exceed the tool capacity.
• Use the right tool for the job. Do not attempt to force a small tool or attachment to do the work of a larger industrial tool. There are certain applications for which this welder was designed. Do not modify this welder and do not use this welder for any other purposes for which it was not intended.
• Use eye and ear protection. Always wear an ANSI approved, arc shaded, impact safety face shield (welding helmet). Always use a full-face shield when welding. Always wear ANSI approved eyewear under the face shield while in the workplace. Wear a NIOSH approved dust mask or respirator when working around metal, chemical dusts, fumes, and mists.
• Do not overreach. Keep proper footing and balance at all times. Do not reach over or across running machines.
• Maintain tools. Keep tools sharp and clean for better and safer performance. Follow instructions for lubricating and changing accessories. Inspect tool cords periodically and, if damaged, have them repaired by an authorized technician. The handles must be kept clean, dry, and free from oil and grease at all times.
• Disconnect power. Unplug the tool when not in use.
• Remove adjusting keys and wrenches. Check that keys and adjustment wrenches are removed from the welder and work area before plugging in the power supply.
• Dress properly. Do not wear loose clothing or jewelry as they can be caught in moving parts. Protective, flame retardant, electrically non-conductive clothing and non-skid footwear are recommended when working. Wear restrictive hair covering to protect your long hair.

1.3 Important Safety Instructions

(WARNING: To reduce the risk of burns, electrocution, fire or injury to persons!)

• a) Do not disassemble the unit except for the authorized serviceman.
• b) Unplug the unit before filling. Do not exceed the MAX mark.
• c) Do not touch the socket with wet hands to reduce the risk of electrocution.

2. Specifications

The welding machine adopts the most advanced inverter technology, suitable for gas welding (solid wire) and gasless welding (Flux-cored wire). The development of inverter welding equipment profits from the development of inverter power supply theory and components. Inverter welding power sources utilize high-power component IGBT 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 reduction of the main transformer's weight and volume, the efficiency increased by 30%. The appearance of inverter welding equipment is considered to be a revolution for the welding industry.

Inside the machine is equipped with an electronic reactor circuit that can accurately control the process of the electric short transition and blending transition, resulting in excellent welding characteristics. Compared with synergic welding machines and other machines, it has the following advantages: stable wire speed, compact body, power saving, no electromagnetic noise, continuous and stable operation with small current. It is especially suitable for welding sheets of low-carbon steel, alloyed steel, and stainless steel. It has features like automatic voltage pulsation compensation capability, small sparkle, good arcing, uniform welding pool, high duty cycle, and so on.

Thank you for purchasing this product. We hope for your valuable advice. VEVOR is dedicated to producing the best products and offering the best service.

2.1 Machine Introduction

MIG-160/200D3/250/270 Single voltage series panel introduction

• Front Panel: Power indicator light, Switch mode (MMA/LIFT-TIG/MIG), MMA/TIG Welding current adjustment, MIG voltage adjustment, MIG Wire speed adjustment, Positive polarity connector, Overheating alarm, Welding current display, Welding Wire Inching, Welding voltage display, Negative polarity connector, MIG Welding gun.
• Rear Panel: Trachea inlet connector, The power switch, Power cord with plug, Ground wire, Built-in cooling Fan and ventilation.

Note: Very important!

1. Connect the polarity conversion cable connector to the positive polarity connector when solid carbon steel welding wire is used. Ground wire clamp negative polarity connector!
2. Connect the polarity conversion cable connector to the negative polarity connection when using the airless self-protective wire. Connector, Ground wire clamp positive polarity connector!!

MIG-250/270 Dual voltage series panel introduction

• Front Panel: Power indicator light, Overheating alarm, Welding current display, Welding voltage display, MIG bum-back function, Switch mode, Welding Wire Inching, Welding current adjustment, MIG Wire speed adjustment, MIG voltage adjustment, Positive polarity connector, Negative polarity connector, MIG Welding gun, Polarity conversion cable connector.
• Rear Panel: Trachea inlet connector, The power switch, Power cord with plug, Ground wire, Built-in cooling Fan and ventilation.

Description for various functions

2.2 What's Included

2.3 Simple Test for the Powering Machine

VEVOR Welding machines are subjected to strict tests before leaving the factory to ensure high quality. Due to long-distance transportation, some internal components may become loose or damaged. Please check the external device as soon as you get the welder and turn on the power to ensure it is a qualified product.

1. Please make sure your power supply voltage is AC220V, 110V/220V±10%. It supports 220V or 110V/220V input voltage. If you have a generator power supply, please ensure that the generator is not less than 4000W.
2. It is recommended to choose a 50A circuit breaker protection when the input voltage is AC110V.
3. Please choose the power plug that suits your local electrical law requirements.

Note:

• 1) The digital display may show irregular changes at the beginning, which is normal and will return to normal after 3 seconds.
• 2) To reduce the working temperature of the machine, it is normal for the fan to continue to rotate for a few seconds after the power is turned off.
• 3) During high-strength continuous welding, machine protection may occur. After continuous heat dissipation, the machine will return to normal.

Attached table: Self-examination of abnormal conditions without response when turning on the machine:

• 1. The machine's power switch is not turned on.
• 2. The power input voltage is wrong.
• 3. The power plug is loose.
• 4. The internal circuit is loose (due to long-distance transportation, bumps). You need to open the cover and check the internal connection line.

2.4 Technical Specifications

2.5 For Control Panel

[Diagram of MIG-250 Control Panel with numbered labels]

1. Overheating alarm
2. Power indicator light
3. Welding current display
4. Welding Model Switch (MMA, MIG, LIFT-TIG)
5. Welding Wire Inching
6. Current Adjustable Knob (MMA, MIG, LIFT-TIG)
7. Welding voltage display
8. MIG Welding Voltage Adjustable Knob
9. MIG Wire Speed Adjustable Knob
10. Positive polarity connector
11. Negative polarity connector
12. MIG Welding gun
13. Polarity conversion cable connector

[Diagram of MIG-250 Rear Panel with numbered labels]

14. Trachea inlet connector
15. The power switch
16. Power cord with plug
17. Ground wire
18. Built-in cooling Fan and ventilation

3. The Installation

3.1 MMA Mode

If you want to repair some broken fences or fix brackets, you can use traditional welding rods for operation. You can use MMA mode for welding.

1. Select "MMA" MODE.

   [Image of MIG-250 control panel with MMA mode selected]

2. Connect welding holder and ground clamp.

   [Image of VEVOR welder connected to welding holder and ground clamp]

3. To adjust the current, only the current can be adjusted.

   [Image of MIG-250 control panel showing current adjustment]

   Note:

   • (1) The welding rod specification supported by VEVOR is below 3.2 mm (1/8 in), usually 2.5 mm(3/32 in) and 3.2 mm(1/8 in). European style generally uses E6013, American style generally uses E7018, and stainless steel generally uses ER308.
   • (2) It supports welding of 1-5 mm (1/64-7/32 in) carbon steel and 1-3.2 mm (1/64-1/8 in) stainless steel. Aluminum cannot be welded. For carbon steel, please use carbon steel electrode. For stainless steel, please use stainless steel electrode.
   • (3) Connect the ground clamp to clean bare metal. The metal without rust, paint, or other coatings can ensure good electrical conductivity.
   • (4) The ideal distance between the welding rod and the welding object is 1-2 mm (1/64-5/65 in). It ensures the continuous and stable contact between the welding rod and the workpiece. The welding rod should not be too high or pressed too low to avoid arc breaking and adhesion.
   • (5) It is normal for novices to have adhesion during the welding process, and you can try to friction arc to avoid adhesion.

   Possible problems:

   • 1) There is no arc: check the ground wire connection to the workpiece to ensure that there is no rust, paint, or other coatings on the workpiece.
   • 2) There is no arc: check the direct distance between the welding rod and the welding object; the ideal distance is 1-2 mm. Check whether the welding object has rust or oil stains; it is recommended to polish with sandpaper or a grinder.
   • 3) When welding, the spatter is very big, and it feels very difficult to weld: Please try to change the polarity connection of the ground wire clamp and the welding clamp with the machine.
   • 4) During the welding process, if the time exceeds 3 minutes, overcurrent protection may occur. You need to stop working for a few minutes to let the machine cool down for a period of time, and it will automatically recover. If the air cools for more than 10 minutes, and the machine will automatically recover, please shut down and restart the machine.
   • 5) If you have any problems that cannot be solved, please contact VEVOR.

3.2 MIG Mode

1. Select "MIG" MODE.

   [Image of control panel with MIG mode selected]

2. Installment when use gas welding (solid wire):
   1. Connect the gas bottle with CO2 regulator flow meter and the Input Gas Connector behind the machine via gas hose.
   2. Insert the cable connector of the earth cable into the socket in the front panel.
   3. Set the welding wire spool on the wheel axis; the wheel hole should be matched with the wheel fixer.
   4. Choose wire slot according to wire size.
   5. Loosen the screw of the wire-pressing wheel, put the wire into the slot via the wire-lead tube, and tune the wire. Distorts and affects wire sending. Wire is usually set to the fixed hole on the wheel side. To prevent the bent wire from getting stuck, please cut off this part of the wire.
   6. The MIG torch has been set inside the machine; you just need to put the wire into the Wire-pressing wheel to fix the wire from gliding, but pressure should be suitable in case the wire feeding is unstable.
   7. Wire roller should turn clockwise rotation to let out wire, to prevent wire from gliding; the torch by hand.
3. Connect welding gun and ground clamp.

   [Diagram showing gas cylinder, flow meter, gas hose, input line, clamp, and torch connection]

4. Install wire spool. 0.030"(0.8 mm)/0.040"(1.0 mm) diameter, 4"(100mm 1kg) wire spool.

   [Image showing wire spool installation]

5. Set drive roll. 1. Pressure handle, 2. Wire pressing wheel, 3. Wire feeding wheel. Face the side marked 0.030” away from the machine.

   REMARKS: 1. There are two grooves on one wire feed wheel; one side is 0.030” (0.8 mm) and the other side is 0.040" (1.0 mm) to match the corresponding wire diameter.

   [Image showing drive roll setup with different wire diameters]

   2. Gear wire feed wheel is suitable for flux-cored welding wire. VEVOR's standard configuration includes 1 piece of 1kg flux-cored welding wire, which can be directly installed and used.
6. Feed wire and set pressure.

   [Image showing pressure knob for wire feed]

   Knob set: 2-3 mark.

7. Connect to Input Power. Please refer to the digital sign on the rear panel of the machine for the input voltage; the wrong voltage will damage the machine.

[Image of the rear panel showing input voltage]

8. Remove consumables and depress trigger until wire comes out. Replace consumables. Press and hold the torch switch wrench for more than 3 seconds to not weld. This is fast wire feeding. Let the welding wire be quickly delivered to the gun head.

[Image of hand holding welding wire]

9. Be sure to use porcelain nozzles.

[Image showing parts of a welding torch, including porcelain nozzles]

10. Adjust wire feed speed, current, and voltage.

1. Choose MIG, MMA, LIFT TIG working mode.
2. The machine has a unified function; just adjust the current and voltage knob, and the wire feeding can be adjusted.

   [Image of MIG-250 control panel showing adjustment knobs]

11. With the welding torch 1/4 inch away from the metal, press the trigger completely to initiate the arc.

12. To replace the welding wire. Use the cutting pliers to cut off the front section of the contact tip that is more than the welding wire, loosen the wire feed mechanism pinch wheel, rotate the welding wire reel clockwise, turn the welding wire back to the wire feed reel, pay attention to pinch the welding wire with your right hand to avoid the wire bounce.

[Image showing correct and incorrect wire feeding for replacement]

13. Wearing parts of welding gun.

[Image showing parts of a welding gun: 1. Contact tip, 2. Conductive nozzle, 3. Gas diffuser]

Note:

• 1) Please strictly follow the picture instructions to connect; otherwise, it will not be possible to solder.
• 2) The flux-cored welding wire supports 0.8mm, 1.0mm in diameter.
• 3) The machine can install 1kg (2.2lb) welding wire reels.
• 4) The machine is equipped with a 1kg (2.2lb) flux-cored wire, which can be directly installed and used.
• 5) Support welding material: carbon steel, stainless steel, alloy steel. Aluminum cannot be welded.
• 6) The diameter of the welding wire, the groove of the wire feed wheel, and the aperture of the contact tip must be matched.
• 7) The pressure roller of the wire feeding structure should not be too tight or too loose, which will cause the wire feeding to be unstable.
• 8) The installation of the wire feed reel should not be too loose or too tight, which will cause the wire to be loose and the feeding speed to be slow.

Possible problems:

• 1) There is no response when turning on the power; please check the plug connection.
• 2) There is no response when turning on the power; please open the cover and check whether the internal connecting wires are loose.
• 3) The wire feeding is unstable. Please check the wire feeding reel and the wire feeding pressure roller, and the welding gun should not be wound. Pay attention that the diameter of the welding wire matches the wire feeding wheel groove and contact tip.
• 4) No wire feeding: please confirm that the working mode is MIG state, please confirm that the welding gun is connected well, press the gun switch or no wire feeding, please contact VEVOR.
• 5) During the welding process, if the time exceeds 3 minutes, over-current protection may occur. You need to stop working for a few minutes, let the machine cool for a period of time, and automatically recover. If the air cools for more than 10 minutes, the machine does not automatically recover; please shut down and restart.
• 6) If you have any questions, please contact VEVOR.

3.3 LIFT TIG Mode

VEVOR MIG for thin plates with higher welding process requirements or welding with higher process requirements, especially for stainless steel welding, you can use the LIFT TIG mode, which requires the use of pure argon.

1. Select "Lift TIG" MODE.

   [Image of control panel with Lift TIG mode selected]

2. Adjust the current; only the current can be adjusted.

   [Image of MIG-250 control panel showing current adjustment for Lift TIG]

3. WP17V Structure of welding torch.

   Note: Standard accessories package kit not included this torch.

   [Diagram showing the structure of a WP17V welding torch with dimensions]

Remark: 1. Ceramic nozzle, 2. Tungsten collet, 3. Tungsten collet body, 4. Short back cap, 5. Long back cap. Please keep the above wearing parts in stock.

Note:

• 1) Please connect according to the picture; otherwise, it cannot be welded.
• 2) This machine is not a professional high-frequency arc starting argon arc welding machine; it is only a LIFT TIG contact arc starting or friction starting.
• 3) Need to use TIG, wp17v torch; this torch is not included, you need to buy it yourself.
• 4) Support welding material: carbon steel, stainless steel, alloy steel. Aluminum cannot be welded.
• 5) This welding mode requires the use of tungsten needles, which need to be purchased separately, and the size of the tungsten needle must match the collet and collet body of the welding gun; otherwise, it cannot be installed.
• 6) In this mode, argon welding must be used.

Possible problems:

• 1) There is no response when starting up; please check the plug connection.
• 2) There is no response when booting up; please open the cover and check whether the internal connection wires are loose.
• 3) During the welding process, if the time exceeds 3 minutes, over-current protection may occur. You need to stop working for a few minutes, let the machine cool for a period of time, and automatically recover. If the air cools for more than 10 minutes, the machine does not automatically recover; please shut down and restart.
• 4) If you have any questions, please contact VEVOR.
• 5) Lift tig is different from professional high-frequency tig. Lift tig needs to be welded after contact with arcing. High-frequency tig does not require contact with arcing. Lift tig is not suitable for spot welding.

4. Troubleshooting

Observe all Safety Guidelines detailed throughout this manual.

EC REP
EUREP GmbH Unterlettenweg 1a, 85051 Ingolstadt, Germany
Importer: WAITCHX
Address: 250 bis boulevard Saint-Germain 75007 Paris

Manufacturer: Zhongshan Tensun Welding Equipment Co.,Ltd
Add: 2nd Floor, Building D2, Tianzhou Zhigu Innovation Park, No.66 Hesui, Industrial Avenue, Dongfeng Town, Zhongshan City, Guangdong, China.

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