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- 32 -

 

No.

 

Problem

 

Root Cause

 

What to do

 

 

 

 

 

5

 

Unstable 

arc 

and  excessive 

spatter

 

Welding parameters do 

not match or irregular 

operation.

 

Readjust welding parameters or 

improve operation.

 

Badly worn contact tip.

 

Replace contact tip.

 

6

 

CO

2 

regulator 

does  not  heat 

gas.

 

CO

2 

regulator damaged.

 

Replace CO

2 

regulator

 

Broken or short-circuited 

heating cable.

 

Repair heating cable.

 

Blown thermistor on the 

heating supply.

 

Replace the thermistor.

 

7

 

When 

torch 

trigger 

is 

pressed 

and 

held,  wire  feed 

is normal but no 

gas flow.

 

Damaged control circuit 

board.

 

Replace the control circuit 

board.

 

Damaged solenoid valve.

 

Replace the solenoid valve.

 

8

 

When 

torch 

trigger 

is 

pressed 

and 

held, 

wire 

feeder  fails  and 

there 

is 

no 

indication 

of 

open 

circuit 

voltage.

 

Torch switch damaged.

 

Replace the torch.

 

Broken wire feeding 

control.

 

Repair the wire feeding control 

cable.

 

Damaged control circuit 

board.

 

Replace the control circuit 

board.

 

 

 

 

 

 

Содержание MIG 280 PLUS

Страница 1: ...Digital Inverter Pulsed Gas Metal Arc Welding Machine MIG 280 PLUS Operation Manual Read this manual carefully before installing operating and maintaining the machine...

Страница 2: ...nted in this operation manual This manual will contain as far as possible preventive and safe operation measures related to the equipment but cannot exclude the occurrence of accidents Therefore the m...

Страница 3: ...s 3 Warnings 4 Packaging and Transportation 7 Parameters 8 Product Description 8 Working Principle 16 Installation and Wiring 17 Brief Procedure for Welding Operation 27 Maintenance 30 Common Machine...

Страница 4: ...nd the following safety precautions must be followed 1 The operator must be suitably qualified and certificated before operating the equipment 2 A qualified professional should be employed to ensure t...

Страница 5: ...Avoid clothes with front pockets and button up sleeves and collars 3 Use appropriate flame retardant shields or curtains to protect bystanders from arc radiation and high temperature sparks Bystander...

Страница 6: ...as a secure ground clamp is important 2 Insulation layers of electric wires and cables must be checked regularly for wear and replaced if necessary 3 All equipment used and clothing worn during the w...

Страница 7: ...cess fumes can be produced which may be detrimental to health 1 The working area should be well ventilated and welding cutting activities should not be executed in confined spaces Eye nose or throat d...

Страница 8: ...outlet with a dust cap Protection Against Moving and Rotating Parts Moving parts such as fans rotors and belts can be hazardous 1 Ensure that all protective covers doors and panels on the machine are...

Страница 9: ...to a high frequency high voltage power supply The inversion process is facilitated by a powerful IGBT device followed by step down rectification and pulse width modulation PWM technology producing a...

Страница 10: ...nsured by the IGBT high frequency soft switching inverter technology 1 3 A stable welding process and excellent arc self regulation is ensured by the closed loop control system regulating a stable vol...

Страница 11: ...e is connected to the negative terminal and should be reversed when using scratch start DC TIG in MMA mode In MIG mode the polarity cable is connected to the positive terminal and the earth cable is c...

Страница 12: ...holding this button depressed for 3 seconds all parameters will be restored to factory values 7 Voltage adjusting Dial Turning the dial will adjust the voltage output 8 Push button Left Menu Tapping t...

Страница 13: ...rc stopping repeat 2T 4T with arc stopping spot continuous spot and communicate with the robot When the corresponding light is lit the selected mode is operational 14 Push button Welding Type Selectio...

Страница 14: ...Welding operation starts and welding current reaches the arc start current If the trigger is not released the operation will continue with the start current t3 t4 Trigger released and the welding cur...

Страница 15: ...n the spot welding mode t4 t5 Trigger released after the preset welding time the operation will stop when the preset time has elapsed and the current drops to zero as post flow will continue for a sho...

Страница 16: ...iameters can be selected As a general rule 1 0mm or 1 2mm wire is used for welding aluminium and 1 2mm is the recommended diameter For copper stainless steel and carbon steel material 0 8mm or 1 0mm w...

Страница 17: ...elding Welding Mode MIG MAG 1 3 MMA Welding Welding Mode MMA 2 Diagram Explaining Working Principle 2 1 A bridge rectifier converts AC to DC 2 2 Controlled by PWM the IGBT inverts the DC to 33Khz AC a...

Страница 18: ...not on a surface with an inclination of more than 10 degrees 1 3 The machine should not be operated in a work station exposed to wind Should a windy environment be unavoidable suitable screening shoul...

Страница 19: ...e main power supply to the control box must be switched off 3 4 An earth cable set must be securely connected from the machine to the work piece The machine must be earthed 3 5 Ensure that the require...

Страница 20: ...ravity can cause the cylinder to topple resulting in injury and material damage 4 2 The cylinder must be placed out of reach of the operator and not in contact with the work table work piece or the we...

Страница 21: ...20 No Item No Item 1 Cylinder valve cover 6 Gas inlet 2 Cylinder valve 7 Flowrate regulating valve 3 Gas cylinder 8 CO2 adapter 4 Flowmeter 9 O ring 5 Flowmeter outlet...

Страница 22: ...he shaft with the locating hole on the spool slide the spool onto the hub shaft and fasten the hub nut as explained below in clause 5 2 Installation of 5kg 200mm Wire Spool No Item No Item 1 Wire spoo...

Страница 23: ...justment Applying a hexagon socket wrench adjust the screw fastener to adjust the braking tension of the spool If the tension is too loose then the wire will unravel once the spool stops If the tensio...

Страница 24: ...nurled V groove roll Suited for hard wires such as carbon steel and stainless steel wire U groove roll Suited for soft wires such as aluminium and aluminium alloy wires Knurled roll Suited for flux co...

Страница 25: ...r Should the wire slip when exiting the contact tip readjust However Take care not to apply excessive pressure which will result in wire being deformed and coatings being damaged Excessive pressure wi...

Страница 26: ...re liner into the torch leaving approximately 60mm of the liner outside the torch Set up the welding torch into the Euro adapter Wire liner should be left about 5mm outside Take care Ensure the wire l...

Страница 27: ...y part The speed of the wire exiting the nozzle can cause a nasty jab Installation Steps a Open the tensioner roller b Pull approximately 150mm wire from the spool c Feed the wire through the wire fee...

Страница 28: ...supply of the machine 1 3 Confirm the gas in the gas cylinder is sufficient no damage to the gas hose and flowmeter 1 4 Confirm that the insulation layers on all the wires and cables of the welding m...

Страница 29: ...elding zone 3 Select the suitable spool of wire and mount it over the feeder hub as explained in clause 5 1 4 Check the brake force tension is sufficient as explained in clause 5 2 5 Select the suitab...

Страница 30: ...rea keep the torch tilted in a certain angle against the welding bead If the two work pieces form an angle of 90 the angle between the torch and the work piece should be about 45 and about 60 between...

Страница 31: ...cooling of the machine is dependent on a designed air flow pattern it is important to return the side cover plate after the cleaning operation Not paying attention to this detail will result in over h...

Страница 32: ...ch Blown fuse Replace fuse 2 Machine switched on auto air switch trips immediately Failure of auto air switch Replace auto air switch IGBT damaged Replace IGBT and drive circuit board Three phase brid...

Страница 33: ...heating cable Blown thermistor on the heating supply Replace the thermistor 7 When torch trigger is pressed and held wire feed is normal but no gas flow Damaged control circuit board Replace the contr...

Страница 34: ...gth too long and voltage too high 9 Insufficient silicon and manganese content in welding wire 2 Poor welding bead 1 Welding parameters unsuitable for the current job 2 Welding wire out of position an...

Страница 35: ...ool rotation excessive wear on the groove of the drive roll and the pressure from the tensioner roller not adequate 3 Too low welding current and fluctuation of arc voltage 4 Protruding welding wire o...

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