SWP Stealth Cobra TIG 321 Operator's Manual
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SWP Stealth Cobra TIG 321 Operator's Manual

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OPERATOR'S MANUAL
TIG 321 INVERTER
Part No. 9112H
IMPORTANT
Read this Operator's Manual completely before attempting to use this equipment.
Save this manual and keep it handy for quick reference.
Pay particular attention to the safety instructions we have provided for your protection.
Contact your distributor if you do not fully understand this manual.

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  • Page 1 OPERATOR’S MANUAL TIG 321 INVERTER Part No. 9112H IMPORTANT Read this Operator’s Manual completely before attempting to use this equipment. Save this manual and keep it handy for quick reference. Pay particular attention to the safety instructions we have provided for your protection. Contact your distributor if you do not fully understand this manual.

  • Page 2: Table Of Contents

    CONTENT CONTENT §1 SAFETY..............................1 §2 SUMMARY ............................9 §2.1 Features ..............................9 §2.2 Brief Introduction ..........................10 §2.3 Parameters .............................. 12 §2.4 Duty cycle & Over heat ......................... 13 §2.5 Working Principle ..........................13 §2.6 Volt-Ampere Characteristic ........................ 14 §3 Installation &...
  • Page 3 CONTENT §4 Maintenance & Troubleshooting ....................42 §4.1 Maintenance ............................42 §4.2 Troubleshooting ............................ 43 §4.3 MMA Welding - Trouble Shooting ....................45 §4.4 DC TIG Welding - Trouble Shooting ....................46 §4.5 List of error code ........................... 48...

  • Page 4: Safety

    SAFETY §1 SAFETY Notice: The instructions are for reference only. The manufacturer reserves the right to explain the differences between the description and the product due to product changes and upgrades! The device is manufactured using state-of-the-art technology and according to recognised safety standards. If used incorrectly or misused, however, it can cause: ...
  • Page 5 SAFETY Excessive ambient temperature will cause the machine heat dissipation is not smooth, so that the internal components of the machine heat seriously. Usually the maximum operating temperature is 104°F (40°C). Low temperature may lead to performance degradation or damage of components inside the product, resulting in ice inside the water tank.
  • Page 6 SAFETY Many harmful phenomena, such as noise, bright light and harmful gas, will inevitably occur in the welding process. In order to avoid harmful By product phenomena causing harm to the human body, it is necessary to make corresponding preparations in advance. Arc rays from the welding process produce intense visible and invisible ultraviolet and infrared rays that can burn eyes and skin.
  • Page 7 SAFETY Welding may produce fumes and gases hazardous to health. Avoid breathing these fumes and gases.  Do not breathe the smoke and gas generated whilst welding or cutting, keep your head out of the fumes. Use enough ventilation and/or exhaust at the arc to keep fumes and gases away from the breathing zone.
  • Page 8 SAFETY Flying sparks from the welding arc, hot work piece, and hot equipment can cause fires and burns. Accidental contact of electrode to metal objects can cause sparks, explosion, overheating or fire.  Welding sparks and hot materials from welding can easily go through small cracks and openings to adjacent areas.
  • Page 9 SAFETY cylinder outlet valve and gas regulator. Use only compressed gas cylinders containing the correct shielding gas for the process used and properly operating regulators designed for the gas and pressure used. All hoses, fittings, etc. should be suitable for the application and maintained in good condition.

  • Page 10: Safety Device

    SAFETY maintenance. Don’t sling cables or leads around either the body or parts of the body. The electrode (rod electrode, tungsten electrode, welding wire, etc) must  Never be immersed.  Never be touched when current is flowing. When the machine is connected to the power supply, there is electricity inside the machine.
  • Page 11 SAFETY  Shield off entire welding installation. Radiation Class A Device.  Only can be used in the industrial area.  If it is used in other area, it may cause connection and radiation problems of circuit. Radiation Class B device. ...

  • Page 12: Summary

    SUMMARY §2 SUMMARY §2.1 Features  Input voltage, works with three-phase: 400V.  IGBT module inverter technology for smooth & stable output, increased reliability and high duty cycle.  Phase loss protection for automatic shut down if power supply phase loss occurs, to prevent damage.

  • Page 13: Brief Introduction

    SUMMARY §2.2 Brief Introduction BT TIG-series welding machine adopts the latest pulse width modulation (PWM) technology and insulated gate bipolar transistor (IGBT) power module, which can change work frequency to medium frequency so as to replace the traditional hulking work frequency transformer with the cabinet medium frequency transformer. Thus, it is characterized with portable, small size, light weight, low consumption and etc.
  • Page 14 SUMMARY such as stable welding arc, low tungsten pole loss, more welding current, narrow and deep weld; 4. For AC TIG (rectangle wave), arc is more stable than Sine AC TIG. At the same time, you can not only obtain the max penetration and the min tungsten pole loss, but also obtain better clearance effect;...

  • Page 15: Parameters

    SUMMARY §2.3 Parameters Models BT TIG 321 Parameters Power source 3-400V±10%，50/60Hz Max input current (A) 18.6 17.4 24.6 23.2 Max input power (kVA) 12.9 12.0 17.0 16.1 Welding current range(A) 5~320 10~320 Max No-load voltage (V) 10.3 Up slope/Down slope (S) 0~10 Pre/Post Flow (S) 0.1~2.0/ 0.0~10.0...

  • Page 16: Duty Cycle & Over Heat

    SUMMARY §2.4 Duty cycle & Over heat The letter “X” stands for duty cycle, which The relation of the welding current is defined as the proportion of the time that a and duty cycle for BT TIG 321 machine can work continuously within a certain time (10 minutes).

  • Page 17: Volt-Ampere Characteristic

    SUMMARY §2.6 Volt-Ampere Characteristic BT TIG-series welding machine has an excellent volt-ampere characteristic, whose graph is shown as the following figure. The relation between the conventional rated loading voltage U and the conventional welding current I is as follows: When I ≤600A, U =10+0.04I (V);...

  • Page 18: Installation & Operation

    INSTALLATION & OPERATION §3 Installation & Operation §3.1 Layout for Front and Rear panel §3.1.1 Layout for welder 1. TIG gun control connector. 2. Positive (+) welding power output connection socket. 3. TIG torch gas connector. 4. Negative (-) welding power output connection socket. 5.

  • Page 19: Layout For Water Cooling

    INSTALLATION & OPERATION §3.1.2 Layout for water cooling Water level calibration.* * Intake: From here, water or coolant, antifreeze, etc. can be injected into tank. Backwater inlet for TIG (red).* * Water outlet for TIG (blue).* * Water outlet for MIG (blue).* * Backwater inlet for MIG (red).* * Water cooling control connector.* * Outfall: The water can be discharged form here.

  • Page 20: Layout For Control Panel

    INSTALLATION & OPERATION Inlet (3) and outlet (4) for TIG The two nozzles on the same side of the intake (2) are used for TIG operation and can be connected to the nozzles on TIG welding torch. Blue corresponds to the outlet: cold water is delivered from the tank;...
  • Page 21 INSTALLATION & OPERATION 1. Welding mode button: Press it to select MMA/ HF TIG/ Lift TIG welding mode. 2. Output waveform button.* 3. Trigger mode selecting button: Press it to select 2T or 4T trigger mode. * 4. Welding function button: Press it to select the opening or closing of Pulse mode and Spot welding mode.
  • Page 22 INSTALLATION & OPERATION (4) AC Triangle Wave Output reduces heat input for same current setting. Be especially useful for welding thin metal. Trigger mode selecting button (3)  2T Mode The trigger is pulled and held on to activate the welding circuit, when the trigger is released, the welding circuit stops.
  • Page 23 INSTALLATION & OPERATION or I ), and then arc is turned off. (7) t4～t5: Post-gas time, after the arc is turned off. You can adjust it (0.0~10s) through turnning the knob on the front panel. (8) t5: Electromagnetic gas valve turned off, the shield gas stops to flow, and welding is finished.
  • Page 24 INSTALLATION & OPERATION alternately; otherwise, output the setting value of welding current; (7) t4: Press the torch switch again, the welding current will drop in accordance with the selected down-slope time. (8) t4～t5: The output current slopes down to the crater current. The downslope time can be adjusted;...

  • Page 25: Mma Display Introduction

    INSTALLATION & OPERATION §3.2.2 MMA display introduction 1. Welding mode button: Press it to enter MMA welding mode. 2. Out waveform button: Press it to select DC output or AC Square wave output. 3. Parameter A button: Press it to select Hot start. Setting range: 0~10. 4.

  • Page 26: Hf/Lift Tig Display Introduction

    INSTALLATION & OPERATION §3.2.3 HF/LIFT TIG display introduction 1. Welding mode button: Press it to enter HF TIG or Lift TIG welding mode. 2. Output waveform button: Press it to select DC output or AC wave output. 3. Trigger mode button: Press it to select 2T or 4T trigger mode. 4.

  • Page 27: Tig Pulse Display Introduction

    INSTALLATION & OPERATION time. 8. Function B button: Press it to select Down slope time, End arc current and Post-gas time. 9. Parameters select/adjust knob: Press it to select welding current and other parameters. Rotate it to adjust parameters’ value. 10.

  • Page 28: Tig Spot Display Introduction

    INSTALLATION & OPERATION §3.2.5 TIG Spot display introduction 1. Current display: 5~320A. 2. T display: 0.2~1.0s. 3. T display: off~10.0s. §3.2.6 JOB Program introduction 1. Welding mode display: Here are selected welding states. 2. Parameters display: Here are all selected parameters values. 3.

  • Page 29: Installation & Operation For Mma Welding

    INSTALLATION & OPERATION §3.3 Installation & Operation for MMA welding §3.3.1 Set up installation for MMA Welding Connection of Output Cables Two sockets are available on this welding machine. For MMA welding the electrode holder is shown be connected to the positive socket, while the earth lead (work piece) is connected to the negative socket, this is known as DCEP.

  • Page 30: Operation For Mma Welding

    INSTALLATION & OPERATION welding cable connected to the appropriate position, not to pick the wrong voltage; (5) With the corresponding input power supply terminal or socket good contact and prevent oxidation; (6) With a multi meter measure the input voltage is within the fluctuation range; (7) The power ground is well grounded.

  • Page 31: Mma Welding

    INSTALLATION & OPERATION §3.3.3 MMA Welding One of the most common types of arc welding is manual metal arc welding (MMA) or stick welding. An electric current is used to strike an arc between the base material and a consumable electrode rod or ‘stick’. The electrode rod is made of a material that is compatible with the base material being welded and is covered with a flux that gives off gaseous vapours that serve as a shielding gas and providing a layer of slag, both of which protect the weld area from atmospheric contamination.

  • Page 32: Mma Welding Fundamentals

    INSTALLATION & OPERATION The Metal Wire Core works as conductor of the current that maintains the arc. The core wire melts and is deposited into the welding pool. The covering on a shielded metal arc welding electrode is called Flux. The flux on the electrode performs many different functions.

  • Page 33: Arc Length

    INSTALLATION & OPERATION using a general purpose type 6013 electrode.  Welding Current (Amperage) Electrode Size Current Range ø mm (Amps) 2.5 mm 60~95 3.2 mm 100~130 4.0 mm 130~165 5.0 mm 165~260 Correct current selection for a particular job is an important factor in arc welding. With the current set too low, difficulty is experienced in striking and maintaining astable arc.

  • Page 34: Travel Speed

    INSTALLATION & OPERATION When vertical up welding, the angle of the electrode should be between 80 and 90 degrees to the work piece.  Travel Speed The electrode should be moved along in the direction of the joint being welded at a speed that will give the size of run required.

  • Page 35: Operation For Tig Welding

    INSTALLATION & OPERATION (8) Connect the gas line to the machine inlet gas connector via the quick push lock connector located on the rear panel. Check for Leaks! NOTE: Air cooling mode without cooling device，and the water pipe is not needed for the air cooling mode.

  • Page 36: Dc Tig Welding

    INSTALLATION & OPERATION  When 4T operation is selected, press and release trigger Gas starts, touch and lift arc start. Press and release trigger again, Gas and Arc stops. (4) Set up current and TIG parameter setting, including Pre Gas, Slow down, etc. (5) Select water cooling mode on the front panel.

  • Page 37: Tig Welding Fusion Technique

    INSTALLATION & OPERATION DC TIG welding is a process in which an arc is struck between a TUNGSTEN electrode and the metal work piece. The weld area is shielded by an inert gas flow to prevent contamination of the tungsten, molten pool and weld area. When the TIG arc is struck the inert gas is ionized and superheated changing its molecular structure which converts it into a plasma stream.
  • Page 38 INSTALLATION & OPERATION thin materials can be accomplished without filler metal like edge, corner, and butt joints. This is known as Fusion welding where the edges of the metal pieces are melted together using only the heat and arc force generated by the TIG arc. Once the arc is started the torch tungsten is held in place until a weld pool is created, a circular movement of the tungsten will assist is creating a weld pool of the desired size.

  • Page 39: Tungsten Electrodes

    INSTALLATION & OPERATION §3.4.5 Tungsten Electrodes Tungsten is a rare metallic element used for manufacturing TIG welding electrodes. The TIG process relies on tungsten’s hardness and high-temperature resistance to carry the welding current to the arc. Tungsten has the highest melting point of any metal, 3,410 degrees Celsius.
  • Page 40 INSTALLATION & OPERATION the grinding of the tungsten. Follow the manufacturer’s warnings, instructions, and the Material Safety Data Sheet (MSDS) for its use. E3 (Color Code: Purple) E3 tungsten electrodes (AWS classification EWG) contain a minimum of 98% percent tungsten and up to 1.5 percent Lanthanum and small percentages of Zirconium and Yttrium they are called E3 Tungsten.
  • Page 41 INSTALLATION & OPERATION 97.80 percent tungsten and 1.30 percent to 1.70 percent lanthanum, and are known as 1.5 percent lanthanated. These electrodes have excellent arc starting, a low burn off rate, good arc stability, and excellent re-ignition characteristics. Lanthanated tungsten also share the conductivity characteristics of 2 percent thoriated tungsten.

  • Page 42: Tungsten Preparation

    INSTALLATION & OPERATION §3.4.6 Tungsten Preparation Always use DIAMOND wheels when grinding and cutting. While tungsten is a very hard material, the surface of a diamond wheel is harder, and this makes for smooth grinding. Grinding without diamond wheels, such as Aluminum oxide wheels, can lead to jagged edges, imperfections, or poor surface finishes not visible to the eye that will contribute to weld inconsistency and weld defects.
  • Page 43 INSTALLATION & OPERATION Electrode Included Angle/Taper - DC Welding Tungsten electrodes for DC welding should be ground longitudinally and concentrically with diamond wheels to a specific included angle in conjunction with the tip/flat preparation. Different angles produce different arc shapes and offer different weld penetration capabilities.

  • Page 44: Operation Environment

    INSTALLATION & OPERATION §3.5 Operation Environment  Height above sea level is below 1000m.  Operation temperature range: -10°C ~ 40°C.  Relative humidity is below 90% (20°C).  Preferably site the machine some angles above the floor level, the maximum angle does not exceed 15°.

  • Page 45: Maintenance & Troubleshooting

    MAINTENANCE & TROUBLESHOOTING §4 Maintenance & Troubleshooting §4.1 Maintenance In order to guarantee that arc welding machine works high-efficiently and in safety, it must be maintained regularly. Let customers understand the maintenance methods and means of arc welding machine more, enable customers to carry on simple examination and safeguarding by oneself, try one's best to reduce the fault rate and repair times of arc welding machine, so as to lengthen service life of arc welding machine .Maintenance items in detail are in the following table.

  • Page 46: Troubleshooting

    MAINTENANCE & TROUBLESHOOTING Observe that whether the current output cable is damaged. If it is damaged, it should be wrapped up, insulated or changed. Use the dry compressed air to clear the inside of arc welding machine. Especially for clearing up the dusts on radiator, main voltage transformer, Monthly inductance, IGBT module, the fast recover diode and PCB, etc.
  • Page 47 MAINTENANCE & TROUBLESHOOTING Troubles Reasons Solution No no-load voltage output Check the main circuit and The machine is damaged (MMA) the Pr4. The welding cable is not connected with Connect the welding cable the two output of the welder to the welder’s output The welding cable damaged Repair or change it There...

  • Page 48: Mma Welding - Trouble Shooting

    MAINTENANCE & TROUBLESHOOTING §4.3 MMA Welding - Trouble Shooting The following chart addresses some of the common problems of MMA welding. In all cases of equipment malfunction, the manufacturer’s recommendations should be strictly adhered to and followed. Trouble Possible Reason Suggested Remedy Check earth lead is connected.

  • Page 49: Dc Tig Welding - Trouble Shooting

    MAINTENANCE & TROUBLESHOOTING welding seek assistance for the correct technique Check the joint design and fit up, Poor joint preparation and or make sure the material is not too thick. joint design Seek assistance for the correct joint design and fit up Electrode welds Change the polarity, check the with different or...
  • Page 50 MAINTENANCE & TROUBLESHOOTING 20~40 CFH (6~12 l/min). Check hoses and fittings for leaks. Remove moisture and materials like Contaminated base metal paint, grease, oil and dirt from base metal Remove all grease, oil or moisture Contaminated filler wire from filler metal Check the filler wire and change if Incorrect filler wire necessary...

  • Page 51: List Of Error Code

    MAINTENANCE & TROUBLESHOOTING tungsten if required Loose connection Check all connectors and tighten Earth clamp not connected to Connect the earth clamp directly to the work work piece wherever possible §4.5 List of error code Error Type Error code Description Over-heating (1st thermal relay) Over-heating (2nd thermal relay) Thermal relay...

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Stealth cobra bt tig 3219112h

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