Section E Troubleshooting | Lincoln Electric IM774 specification

Section E

Troubleshooting

Trouble

Cause

Remedy

	115 VAC Control fuse in feeder/	Replace fuse.
No wire feed at gun,	Control box blown.
No wire feed at gun,	Micro-switch defective/not	Replace switch. Check switch
feeder not operating, i.e., no	Micro-switch defective/not	Replace switch. Check switch
feeder not operating, i.e., no	being activated.	for operation.
slave motor or brake solenoid.	being activated.	for operation.
slave motor or brake solenoid.	Broken electrical cable.	Check micro-switch wires for
		Check micro-switch wires for
		continuity.
		continuity.
	24 VAC Control fuse in feeder/	Check motor leads for shorts;
	Control box blown.	then replace fuse.
	Bad Potentiometer.	Check potentiometer with
	Bad Potentiometer.	meter.
No wire feed at gun, feeder		meter.
No wire feed at gun, feeder		Check motor and potentiometer
operating properly	Broken Electrical Cable	Check motor and potentiometer
operating properly	Broken Electrical Cable	for continuity.
		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
Wire feeds, but welding wire is	Contactor control cable loose or	manual for location and type of
not energized.	in wrong position	contactor signal required.
		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.
Wire feeds erratically.	Idler roll stuck.	Check for lock washer under
		Check for lock washer under
		idler roll, or replace if damaged.
		idler roll, or replace if damaged.
	Bad potentiometer.	Check with meter.
	Broken electrical cable.	Check potentiometer wires for
Wire feeds one speed only.	Broken electrical cable.	continuity or short.
		continuity or short.
		See specific cabinet/control
		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
Wire walks out of the drive	Idler roll upside-down.	top.
rolls.		top.
rolls.	Rear wire guide missing.	Replace wire guide.
	Rear wire guide missing.	Replace wire guide.

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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.