SWP Stealth Cobra TIG 250-3 Operator's Manual
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SWP Stealth Cobra TIG 250-3 Operator's Manual

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OPERATOR'S MANUAL
TIG 250-3 INVERTER
Part No. 9113H
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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Summary of Contents for SWP Stealth Cobra TIG 250-3

  • Page 1 OPERATOR’S MANUAL TIG 250-3 INVERTER Part No. 9113H 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 ........................... 9 §2.3 Parameters .............................. 11 §2.4 Duty cycle & Over heat ......................... 12 §2.5 Working Principle ..........................12 §2.6 Volt-Ampere Characteristic ........................ 13 §3 Installation &...

  • Page 3: 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 4 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 5 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 6 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 7 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 8 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 9 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 10 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 11: Summary

    SUMMARY §2 SUMMARY §2.1 Features  Input voltage, works with three-phase: 400V.  Lift TIG and HF Start Modes for versatility when welding around sensitive electronic equipment.  Adjustable arc force, hot start & anti stick control for greater control and ease of use when MMA welding.
  • Page 12 SUMMARY work frequency transformer with the cabinet medium frequency transformer. Thus, it is characterized with portable, small size, light weight, low consumption and etc. The parameters of BT TIG -series on the front panel all can be adjusted continuously and steplessly, such as start current, crater arc current, welding current, base current, duty ratio, upslope time, downslope time, pre-gas, post-gas, pulse frequency, hot start, arc force and arc length etc.

  • Page 13: Parameters

    SUMMARY BT TIG -series welding machine is suitable for all positions welding for various plates made of stainless steel, carbon steel, alloyed steel, titanium, magnesium, cuprum, etc, which is also applied to pipe installment, mould mend, petrochemical, architecture decoration, car repair, bicycle, handicraft and common manufacture. MMA——Manual Metal Arc welding PWM——Pulse-Width Modulation IGBT——Insulation Gate Bipolar Transistor...

  • Page 14: 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 250-3 machine can work continuously within a certain time (10 minutes).

  • Page 15: 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 16: Installation & Operation

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

  • Page 17: Layout For Control Panel

    INSTALLATION & OPERATION §3.2 Layout for Control panel §3.2.1 Control panel 1. Welding mode button: Press it to select MMA/ HF TIG/ Lift TIG welding mode. 2. Trigger mode selecting button: Press it to select 2T or 4T trigger mode. * 3.
  • Page 18 INSTALLATION & OPERATION (TIG mode). If the key is not pressed within 3s, the selection will be automatically removed. Setting range: 0~10 (arc force). Denotes more detailed explanation of function to follow. Further Controls Explained Trigger mode selecting button (2) 2T Mode The trigger is pulled and held on to activate the welding circuit, when the trigger is released, the welding circuit stops.
  • Page 19 INSTALLATION & OPERATION selected down-slope time. (6) t3～t4: The current drops to the minimum welding current from the setting current (I 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.
  • Page 20 INSTALLATION & OPERATION (6) t3～t4: Welding process. During this period, the gun switch is loosen; Note: Select the pulsed output, the base current and welding current will be outputted 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.

  • Page 21: Mma Display Introduction

    INSTALLATION & OPERATION §3.2.2 MMA display introduction 1. Welding mode button: Press it to enter MMA welding mode. 2. Hot Start button: Press it to select Hot start. 3. Arc Force button: Press it to select Arc force. 4. Parameter adjust knob: Rotate it to adjust welding current and value of Hot start and Arc force.

  • Page 22: 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. Trigger mode button: Press it to select 2T or 4T trigger mode. 3. Welding function button: Press it to select No Pulse/ Pulse/ Spot welding function. (Here is no Spot function in Lift TIG welding mode.) 4.

  • Page 23: Tig Pulse Display Introduction

    INSTALLATION & OPERATION 8. Welding voltage display. 9. Diameter button: Press it to select diameter size. §3.2.4 TIG PULSE display introduction 1. Peak current: 5~250A. 2. Base current: 5~250A, but less than Peak current. 3. Pulse frequency: 0.5~999Hz. 4. Pulse width: 5~95%. §3.2.5 TIG Spot display introduction...

  • Page 24: Job Program Introduction

    INSTALLATION & OPERATION 1. Current display: 5~250A. 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. JOB number: A total 1~10 JOB numbers can store or call the selected parameters by JOB button.

  • Page 25: 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 26: Operation For Mma Welding

    INSTALLATION & OPERATION (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. §3.3.2 Operation for MMA Welding (1) According to the above method to install is correct, rotate the power switch, so that the power switch is “ON”...

  • Page 27: 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 28: 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 29: Arc Length

    INSTALLATION & OPERATION  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 30: 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 31: Installation & Operation For Tig Welding

    INSTALLATION & OPERATION §3.4 Installation & Operation for TIG welding §3.4.1 Set up installation for TIG Welding (1) Insert the earth cable plug into the positive socket on the front of the machine and tighten it. (2) Plug the welding torch into the negative socket on the front panel, and tighten it. (3) Connect the control cable of torch switch to 12 pin socket on the front of the machine.

  • Page 32: Dc Tig Welding

    INSTALLATION & OPERATION  When 2T operation is selected, press trigger Gas starts, touch and lift arc start. Release trigger Gas and Arc stops.  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. (11) Set welding function NO PULSE/PULSE/SINGLE SPOT/MULTI SPOT.

  • Page 33: Tig Welding Fusion Technique

    INSTALLATION & OPERATION The intensity of the arc is proportional to the current that flows from the tungsten. The welder regulates the welding current to adjust the power of the arc. Typically thin material requires a less powerful arc with less heat to melt the material so less current (amps) is required, thicker material requires a more powerful arc with more heat so more current (amps) are necessary to melt the material.

  • Page 34: Tungsten Electrodes

    INSTALLATION & OPERATION 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. Once the weld pool is established tilt the torch at about a 75° angle and move smoothly and evenly along the joint.
  • Page 35 INSTALLATION & OPERATION Thoriated tungsten electrodes (AWS classification EWTh-2) contain a minimum of 97.30 percent tungsten and 1.70 to 2.20 percent thorium and are called 2 percent thoriated. They are the most commonly used electrodes today and are preferred for their longevity and ease of use.
  • Page 36 INSTALLATION & OPERATION stainless steel, nickel alloys, and titanium, and in some cases it can replace 2 percent thoriated electrodes. Ceriated tungsten is best suited for lower amperages it should last longer than Thoriated tungsten higher amperage applications are best left to Thoriated or Lanthanated tungsten.

  • Page 37: Tungsten Preparation

    INSTALLATION & OPERATION §3.4.5 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 38 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 39: 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 40: 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 41: 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 42 MAINTENANCE & TROUBLESHOOTING Troubles Reasons Solution no-load voltage Check the main circuit and the The machine is damaged output (MMA) Pr4. The welding cable is not connected Connect the welding cable to with the two output of the welder. the welder’s output. The welding cable damaged.

  • Page 43: 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 44: Dc Tig Welding - Trouble Shooting

    MAINTENANCE & TROUBLESHOOTING Reduce the amperage or use a Excessive heat input smaller electrode Use the correct welding technique or Distortion − Poor welding technique seek assistance for the correct movement of base technique metal during Check the joint design and fit up, welding Poor joint preparation and or make sure the material is not too thick.
  • Page 45 MAINTENANCE & TROUBLESHOOTING Keep tungsten from contacting weld Touching tungsten into the puddle. Raise the torch so that the weld pool tungsten is off the work piece 2~5mm Contaminated tungsten Keep the filler wire from touching the Touching the filler wire to the tungsten during welding, feed the filler tungsten wire into the leading edge of the weld...
  • Page 46 MAINTENANCE & TROUBLESHOOTING Check and set the gas flow between Poor gas flow 20~40 CFH flow rate Lower torch so that the tungsten is off Incorrect arc length the work piece 2~5mm Check that correct type of tungsten is Tungsten incorrect or in poor being used.

  • Page 47: List Of Error Code

    MAINTENANCE & TROUBLESHOOTING §4.5 List of error code Error Type Error code Description Over-heating (1st thermal relay) Over-heating (2nd thermal relay) Thermal relay Over-heating (3rd thermal relay) Over-heating (4th thermal relay) Over-heating (Program in default) Phase loss No water No gas Welding machine Under voltage Over voltage...

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Stealth cobra bt tig 250-39113h

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