Lincoln Electric IM774 manual Section B, Operation, Controls and Settings

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Section B

Gas Hose

The gas hose is secured over the barbed gas fitting with a tie wrap. The cabinet end of the gas hose uses our standard gas fitting (1/8” - 27 nps).

Water Hose

If so equipped, one end of the water hose is secured over the barbed water fitting with a tie wrap and the other end is connected to the center fitting on the power block.

Electric Cable

A seven conductor control cable is used on the CobraMAX™ gun. The gun end of the control cable is secured to the gun with a boot clamp and soldered to the pot assembly, tirgger and water leads. Slack is left in the electric cable as it exits the back of the gun to prevent cable breakage. The cabinet end has a seven pin “W” clocked amphenol connector.

Operation

General

The CobraMAX™ gun maintains a constant, steady, uniform wire feed speed, regardless of curved or looped wire conduit. The constant push exerted

by the slave motor in the cabinet, combined with the pull of the gun motor, causes the wire to literally float friction-free through the wire conduit. The 24VDC gun motor is controlled by a three and three-quarter (3 3/4) turn potentiometer in the gun handle.

Controls and Settings

Potentiometer

The laterally-positioned potentiometer is located in the lower end of the handle, providing up to 800 ipm with 3 3/4 turns.

Micro Switch

The micro switch assembly consists of the micro switch and leads.

Trigger Sensitivity

The amount of trigger level travel can be shortened for a "quicker" or "more responsive" action.

A more sensitive trigger lever is produced by reducing the gap between the trigger lever and the micro switch lever. By turning-in the trigger sensitivity adjustment screw, it closed the gap between the trigger lever and the micro switch lever.

This will enable the operator to increase the sensitivity of the trigger lever.

Sensitivity Adjustment

With the wire feeder turned on (with or without welding wire loaded), turn the screw in until the micro-switch is activated. Once activated, the tortch and wire feeder motors will begin feeding wire. Retract the screw accordingly until the system is deactivated and adjusted to the operators' liking.

CobraMAX™ Owner's Manual - Page

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Contents Safety Depends on You GmawPage Table of Contents Declaration of Conformity for European Community CE Products Page Safety For Electrically Page Page Thank You Section a Installation Controls and Settings Section BOperation Drive Roll Installation/Removal Idler Roll Installation and RemovalDrive Roll and Idler Rolls Section C Accessories ConduitsSnake Skins Optional KitsContact Tips Spring Loaded TipsGas Cups Maintenance Periodic Maintenance Section DSection E Troubleshooting Trouble Cause RemedyTroubleshooting Guide Testing The GunTesting the Potentiometer W Clocked Testing the Micro SwitchSection F Appendices Diagrams / Parts List CobraMAX Exploded View CobraMAX Parts List Front Body Assembly Ultra-Flex Air Cooled Lead Assembly Water Cooled Lead Assembly CobraMAX Electrical Page Page Limited Warranty

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.
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