Section E

Troubleshooting

Trouble

Cause

Remedy

 

115 VAC Control fuse in feeder/

Replace fuse.

No wire feed at gun,

Control box blown.

 

Micro-switch defective/not

Replace switch. Check switch

feeder not operating, i.e., no

being activated.

for operation.

slave motor or brake solenoid.

Broken electrical cable.

Check micro-switch wires for

 

 

continuity.

 

 

 

24 VAC Control fuse in feeder/

Check motor leads for shorts;

 

Control box blown.

then replace fuse.

 

Bad Potentiometer.

Check potentiometer with

 

meter.

No wire feed at gun, feeder

 

 

Check motor and potentiometer

operating properly

Broken Electrical Cable

for continuity.

 

 

 

 

See specific cabinet/control

 

Bad Speed control/PCB.

box owners manual for speed

 

 

control operation.

 

Loose or no cable connections.

Check all power connections.

Wire feeds, but welding wire is

Contactor control cable loose or

Check power supply owners

manual for location and type of

not energized.

in wrong position

contactor signal required.

 

 

 

Welding power source.

Check power source.

 

Dirty or worn conduit.

Blow out or replace conduit.

Wire feeds erratically.

Wrong size contact tip.

See contact tip table.

Idler roll stuck.

Check for lock washer under

 

 

idler roll, or replace if damaged.

 

 

 

Bad potentiometer.

Check with meter.

 

Broken electrical cable.

Check potentiometer wires for

Wire feeds one speed only.

continuity or short.

 

 

See specific cabinet/control

 

 

 

Bad speed control.

owners manual for speed

 

 

control operation.

Wire walks out of the drive

Idler roll upside-down.

Place groove in idler roll toward

top.

rolls.

 

Rear wire guide missing.

Replace wire guide.

 

CobraMAX™ Owner's Manual - Page

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Lincoln Electric IM774 manual Section E Troubleshooting, Trouble Cause Remedy

IM774 specifications

Lincoln Electric IM774 is a state-of-the-art industrial MIG (Metal Inert Gas) welding machine designed to cater to the demanding needs of professional welders and fabrication shops. This model is known for its versatility, efficiency, and the innovative technologies incorporated into its design, making it a preferred choice for numerous welding applications.

One of the standout features of the Lincoln Electric IM774 is its impressive output range, which allows welders to work with various materials, including steel, stainless steel, and aluminum. This machine can deliver a maximum output of 300 amperes, making it suitable for heavy-duty welding tasks, as well as finer work. Moreover, the IM774 supports different wire sizes, enhancing its adaptability and making it a go-to option for different welding projects.

The IM774 employs advanced inverter technology, which contributes to its compact and lightweight design while maintaining high welding performance. This technology allows for better energy efficiency and reduced operational costs compared to traditional transformer-based machines. The inverter also ensures a more stable arc, resulting in superior weld quality, fewer defects, and reduced spatter.

In addition to its robust performance features, the IM774 comes equipped with several user-friendly functions. The machine features an intuitive digital control panel that provides precise adjustments for wire feed speed and voltage settings. This simplicity in operation allows both novice and experienced welders to achieve optimal results without extensive training.

Safety and durability are paramount in the design of the IM774. The machine is built with a rugged frame that can withstand the rigors of the shop environment. Integrated safety features, including thermal overload protection and a built-in gas solenoid valve, ensure the safe operation of the machine, minimizing risks associated with prolonged use.

Another notable characteristic of the Lincoln Electric IM774 is its compatibility with automated systems. Welders can easily integrate this machine into robotic welding setups or use it for semi-automated welding applications, showcasing its flexibility across various industries.

In conclusion, the Lincoln Electric IM774 MIG welding machine stands out due to its high-performance output, advanced inverter technology, user-friendly controls, and robust safety features. Its combination of adaptability, efficiency, and quality makes it an ideal choice for professionals seeking reliable and high-quality welding solutions.