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LOKERMANN GRAND MIG 351 MULTI SYN, User Manual, Page: 1 / 35

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USER MANUAL

INVERTER Based Welding Machines

 

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.

 

GRAND MIG 351 

M U L T I   S Y N

GRAND MIG 501 

M U L T I   S Y N

Summary of Contents for GRAND MIG 351 MULTI SYN

Page 1: ...s 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 manu...

Page 2: ...ng trouble shooting 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 TIG GUN Control 3 4 4 DC TIG welding trouble shooting 3 5...

Page 3: ...public supply 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 cont...

Page 4: ...4T trigger operation with crater control settings Dual digital display meters for accurate pre setting and feedback of welding parameters output Internal 4 rolls wire feeder gear driven for up to 300...

Page 5: ...unction power source MIG MAG 3 Waveform control stable welding arc 4 IGBT technology low power consumption 5 Rated Duty Cycle GRAND MIG 351 MULTI SYN 350A 60 40 C GRAND MIG 501 MULTI SYN 500A 60 40 C...

Page 6: ...device IGBT after reducing voltage by medium transformer the main transformer and rectifying by medium frequency rectifier fast recovery diodes and is outputted by inductance filtering The circuit ad...

Page 7: ...Display Meter 12 MMA Hot Start Indicator 13 MMA TIG Current Indicator 14 MMA Arc Force Indicator 15 TIG Down Slope Indicator 16 MIG Mode Indicator 17 MMA Mode Indicator 18 MMA VRD Mode Indicator 19 L...

Page 8: ...ot covered under machine warranty 2T 4T selector button 25 2T mode the trigger is pulled and held on to activate the welding circuit when the trigger is released the welding circuit stops 4T is known...

Page 9: ...Lh Digital Display 11 Wire Feeder Rh Digital Display 12 Water Cooling System Error Indicator 13 Spool Gun Indicator 14 Error Overload Indicator 15 Air Check Button 16 Water Air Cooling Selection Butt...

Page 10: ...e the arc to produce less spatter Wire speed wire size and type shielding gas will all change the effect that the inductance setting has on the welding arc Inductance change will have no practical eff...

Page 11: ...yed Tips and Tricks MIG Voltage Wire Speed Settings Voltage is essentially the power in the welding arc that sets the heat The wire speed feed simply controls the rate at which the welding wire is fed...

Page 12: ...manual Stitch Welding This setting causes the arc to trigger for a short fixed period of time This is useful for repetitive tack welding or welding with short runs that limit heat input into the work...

Page 13: ...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 However various electrodes require a different polarity f...

Page 14: ...achine is switched on and has a power supply Wrong mode selected Check the MMA selector switch is selected 2 Porosity small cavities or holes resulting from gas pockets in weld metal Arc length too lo...

Page 15: ...of the power source to the rear of the water cooler 7 Connect the gas regulator to the Gas Cylinder and connect the gas line to the Gas Regulator 8 Connect the gas line to the machine inlet gas connec...

Page 16: ...l meter 7 Assemble front end parts of the TIG torch making sure they are correctly assembled use the correct size and type of tungsten electrode for the job the tungsten electrode requires a sharpened...

Page 17: ...and tighten Earth clamp not connected to work Connect the earth clamp directly to the work piece wherever possible NO Trouble Possible Reason Suggested Remedy 1 Tungsten burning away quickly Incorrect...

Page 18: ...lines match the connectors Water cooled model only 6 Connect interconnect data cables to the rear of the wire feeder using the end of the interconnect cable with the shortest terminations Connect data...

Page 19: ...tip into the tip holder of the torch head and nip it up tightly 18 Fit the gas nozzle to the torch head 19 Open gas cylinder valve and adjust regulator flow should be between 10 25 I min depending on...

Page 20: ...as a lot less column strength can bend easily and is therefore more difficult to feed Soft wires can easily buckle at the wire feeder where the wire is fed into inlet guide tube of the torch The U sha...

Page 21: ...nit 5 Feed the wire through the drive roller 6 Lock down the top pressure roller and apply and into the outlet guide tube of the wire a medium amount of pressure us ing the tension feeder adjustment k...

Page 22: ...a conventional torch This greatly reduces the wire feeding friction and improves the wire feed speed smoothness and consistency thus the welding quality is greatly improved This is especially so with...

Page 23: ...or to a gas cylinder not included with machine 8 Connect the machine to suitable mains power using the mains input power lead 9 Take the Spool Gun and remove the spool cover 10 Place the Wire Spool on...

Page 24: ...elding Basic MIG Welding Good weld quality and weld profile depends on gun angle direction of travel electrode extension stick out travel speed thickness of base metal wire feed speed and arc voltage...

Page 25: ...ck angle of the gun relative to the work piece The correct work angle provides good bead shape prevents undercut uneven penetration poor gas shield and poor quality finished weld Stick Out Stick out i...

Page 26: ...gas in the MIG process is to protect shield the wire the arc and the molten weld metal from the atmosphere Most metals when heated to a molten state will react with the air in the atmosphere without...

Page 27: ...flow or too much gas flow Check the gas is connected check hoses gas valve and torch are not restricted Set the gas flow between 6 12 l min flow rate Check hoses and fittings for holes leaks Protect...

Page 28: ...s a temporary cure it is recommended to replace the liner Wrong size liner Install the correct size liner Blocked or worn inlet guide tube Clear or replace the inlet guide t ube Wire misaligned in dri...

Page 29: ...he floor level the maximum angle does not exceed 15 Protect the machine against heavy rain AND against direct sunshine The content of dust acid corrosive gas in the surrounding air or substance cannot...

Page 30: ...lace the display PCB Observe that the min max Values on LED agree with the set value If there is any difference and it has affected the normal welding results please adjust it Check whether the fan is...

Page 31: ...ht 3 Press the gun switch no output shielded gas No output gas when test gas No gas in the gas cylinder Change it Gas hose leaks gas Change it Electromagneticvalve damaged Change it Output gas when te...

Page 32: ...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 E16 Wire feeder over l...

Page 33: ...4 4 Electrical schematic drawing DRIVER...

Page 34: ...LOKERMANN Srl Via Produzione 16 18 37044 Cologna Veneta VR Italy Tel 39 0442 1722469 lokermann lokermann eu www lokermann eu...

Page 35: ...4 2 Troublesho oting...

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