LOKERMANN GRAND TIG 250 DC PULSE User Manual Download Page 23

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LOKERMANN Srl,
Via Produzione 16/18, 37044, Cologna Veneta,
(VR)-Italy, Tel: +39 0442 1722469

Summary of Contents for GRAND TIG 250 DC PULSE

Page 1: ... GRAND TIG 250 DC PULSE IMPORTANT Read this OPERATOR MANUAL together with PRESCRIPTION AND COMPLIANCE MANUAL before to use this equipment In case of loss one of two parts contact immediately your dealer Allow the operator to consult this manual ...

Page 2: ... MMA Welding 3 3 4 MMA Welding Fundamentals 3 3 5 MMA Welding troubleshooting 3 4 Installation Operation for TIG Welding 3 4 1 Set up installation for TIG Welding 3 4 2 Operation for TIG Welding 3 4 3 Remote current control 3 4 4 Tig Welding Techniques 3 4 5 Electrodes 3 4 6 TIG Welding troubleshooting 3 5 Remote control Configuration 3 5 1 Wireless remote control Configuration 3 5 2 Wire foot ped...

Page 3: ...ply system Consideration should be given to shielding the supply cable of permanently installed arc welding equipment in metallic conduit or equivalent Shielding should be electrically continuous throughout its length The shielding should be connected to the welding power source so that good electrical contact is maintained between the conduit and the welding power source enclosure Maintenance of ...

Page 4: ... to its voltage spikes Up Down Button Remote Control torch Roller wheel amps control on torch Integrated heavy duty industrial trolley and water cooler optional Wireless Remote Control optional Wire Wireless Foot Pedal optional 2 2 Technical Data Models Parameters GRAND TIG 250 DC PULSE Power Supply Voltage V 3 380V 400V 10 Frequency HZ 50 60 Rated input current A 20MMA 15 TIG Rated input power KW...

Page 5: ... status and freezes quickly which can reduce the possibility to produce hot crack of the materials with thermal sensitivity 2 The workpiece gets little heat Arc energy is focused Be suitable for thin sheet and super thin sheet welding 3 Exactly control heat input and the size of the molten pool The depth of penetration is even Be suitable for welding by one side and forming by two sides and all po...

Page 6: ...isplay value time indicator 12 Digital display value percentage indicator 13 RH voltage display 14 Welding output mode button 15 Hf TIG mode indicator 16 Lift TIG mode indicator 17 MMA mode indicator 18 2T trigger indicator 19 4T trigger indicator 20 Trigger control mode button 21 TIG parameter setting indicator 22 Parameter select adjust Knob 23 MMA arc force setting Indicator 24 MMA welding curr...

Page 7: ... knob Value of the parameter selected will be shown on the digital multifunction display 18 TIG Parameter Setting Pre gas flow setting indicator 1 Controls the period shielding gas will flow for when the torch is triggered before the arc starts This purges the work area of atmospheric gas which could contaminate the weld before the weld starts Unit S and setting range 0 2S Start current setting in...

Page 8: ...djustment the higher the minimum voltage that the power source will allow This effect will also cause the welding current to increase 0 is Arc Force off 10 is maximum Arc Force This is practically useful for electrode types that have a higher operating voltage requirement or joint types that require a short arc length such as out of position welds Water Air Cooling Selection Button 28 When using t...

Page 9: ...n range 3 3 2 Operation for MMA Welding 1 According to the above method to install is correct turn the power switch so that the power switch is ON position then the power indicator light the fan comes on the device work properly 2 Set the welding mode button to MMA 3 Set the welding parameters as required using the parameters control knob following the instructions in the previous section 4 Place ...

Page 10: ...ameter and by a series of letters and numbers The letters and numbers identify the metal alloy and the intended use of the electrode The flux on the electrode performs many diferent functions These include producing a protective gas around the weld area providing fluxing elements and deoxidizer creating a protective slag coating over the weld as it cools establishing arc characteristics adding all...

Page 11: ... Use the correct welding technique or seek assistance for the correct technique 5 Lack of penetration Insufficient heat input Increase the amperage or choose a larger electrode Poor welding technique Use the correct welding technique or seek assistance for the correct technique Poor joint preparation Check the joint design and fit up make sure the material is not too thick Seek assistance for the ...

Page 12: ...l or socket good contact and prevent oxidation 12 With a multi meter measure the input voltage is within the fluctuation range 13 The power ground is well grounded NOTE Secure the gas cylinder in an upright position by chaining them to a stationary support to prevent falling or tipping 3 4 2 Operation for TIG Welding 1 According to the above method to install is correct turn the power switch to th...

Page 13: ...o ohm minimum connection to 10k ohm remote control potentiometer Not connected 6 Not connected The button of UP input 7 Not connected The button of DOWN input 8 Trigger Switch Input Trigger Switch Input 9 Trigger Switch Input Trigger Switch Input 10 Be shorted with 11 Not connected 11 Be shorted with 10 The button of UP DOWN input 12 Not connected Not connected 3 4 4 Tig Welding Techniques DC TIG ...

Page 14: ...er wire into the weld pool with one hand while manipulating the welding torch in the other However some welds combining 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 i...

Page 15: ... Grinding longitudinally with the grain the electrons flow steadily and easily to the end of the tungsten tip The arc starts straight and remains narrow concentrated and stable Electrode Tip Flat The shape of the tungsten electrode tip is an important process variable in precision arc welding A good selection of tip flat size will balance the need for several advantages The bigger the flat the mor...

Page 16: ...ated tungsten Touching tungsten into the weld pool Keep tungsten from contacting weld puddle Raise the torch so that the tungsten is off of the work piece 2 5mm Touching the filler wire to the tungsten Keep the filler wire from touching the tungsten during welding feed the filler wire into the leading edge of the weld pool in front of the tungsten Tungsten melting into the weld pool Check that cor...

Page 17: ...ungsten is being used Too much current for the tungsten size so reduce the amps or change to a larger tungsten 7 Arc wanders during welding Poor gas flow Check and set the gas flow between 10 15 l min flow rate Incorrect arc length Lower torch so that the tungsten is off of the work piece 2 5mm Tungsten incorrect or in poor condition Check that correct type of tungsten is being used Remove 10mm fr...

Page 18: ... back on again to start welding operation 5 If the operation is unsuccessful repeat steps 1 to 4 6 During operation the front panel control on the power supply is still functional but the remote control panel or foot pedal has higher priority level 7 When the remote control panel or foot pedal is idles for 10 seconds it will automatically go into sleep mode 8 Only front Panel Control is active whe...

Page 19: ...iately If any switch is not flexible or it can t be put correctly in place please replace immediately Please get in touch with maintenance service department if there are no accessories After turn on power watch listen if thearc welding machine has shaking whistle calling or peculiar smell If there is one of the above problems find out the reason and clear it If you can t find out the reason pleas...

Page 20: ...utput The welding cable damaged Repair or change it The earth cable connected unstably Check the earth cable The welding cable is too long Use an appropriate welding cable There is oil or dust on the workpiece Check and remove it The distance between tungsten electrode and workpiece is too long Reduce the distance about 3mm There is not spark on the HF igniting board The HF igniting board does not...

Page 21: ... lamp thermal protection always on Welding machine E10 Phase loss Yellow lamp thermal protection always on E11 No water Yellow lamp lack water always on E13 Under voltage Yellow lamp thermal protection always on E14 Over voltage Yellow lamp thermal protection always on E15 Over current Yellow lamp thermal protection always on Switch E20 Button fault on operating panel when switch on the machine Ye...

Page 22: ...4 4 Electrical schematic drawing ...

Page 23: ...LOKERMANN Srl Via Produzione 16 18 37044 Cologna Veneta VR Italy Tel 39 0442 1722469 lokermann lokermann eu www lokermann eu ...

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