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F-44

TROUBLESHOOTING & REPAIR

F-44

 

ROTOR VOLTAGE TEST (CONTINUED)

FIGURE F.10 - LEAD LOCATIONS

SLIP RINGS

BRUSHES

 

#200A

 

#200B

#201

+

 

-

 

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TEST PROCEDURE

1.Perform the Case Cover Removal procedure.

2.Connect the voltmeter probes to the brush ter- minals. See Figure F.10. See the wiring dia- gram.

3.Set the RUN/STOP switch to “RUN” and the IDLE switch to “HIGH”. Start the engine and allow the RPM to stabilize for about 15 to 30 seconds.

The meter should read 145 to 175 VDC.

4.Set the RUN/STOP switch to “STOP”

5.If the meter reading is normal, this test is com- plete.

6.If the voltage measures zero or very near zero, the rotor flashing circuit may be faulty or the rotor may be shorted.

7.Perform the Rotor Resistance and Ground Test and the Flashing Voltage Test.

8.If voltage is higher than 175 VDC, the engine RPM may be too high, or there may be voltage intrusion from one of the higher voltage stator windings to the stator exciter winding. Perform the Engine Throttle Adjustment Test, and the Stator Short Circuit and Ground Test.

9.If the voltage is lower than 145, but higher than 120, the engine RPM may be too low, or there may be problems in the windings or other exciter circuit components or connections. Perform the Engine Throttle Adjustment Test, and then perform the testing described below, under the heading “If the voltage mea- sures about 3 to 5 VDC”

VANTAGE® 400

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Lincoln Electric 400 service manual #200B

400 specifications

The Lincoln Electric 400 is a state-of-the-art multi-process welding machine designed to meet the demands of today’s industrial welding applications. Renowned for its reliability and versatility, this welder is a preferred choice among professionals in fabrication, construction, and maintenance industries.

One of the main features of the Lincoln Electric 400 is its multi-process capability. It seamlessly integrates MIG, TIG, and stick welding processes into a single unit, allowing users to switch between methods depending on the job at hand. This flexibility makes it incredibly suitable for a wide range of materials, including steel, stainless steel, and aluminum.

The welding machine boasts a robust power output, with a maximum range of 400 amps. This impressive capacity enables it to handle thick materials effectively, making it ideal for heavy-duty tasks. The machine operates on both single-phase and three-phase power, giving users the advantage of versatility depending on the power source available at the job site.

Another significant characteristic of the Lincoln Electric 400 is its advanced digital display and control interface. This user-friendly panel allows for easy adjustments to voltage and wire feed speed, ensuring precision and high-quality welds. Additionally, the machine includes built-in features to improve the consistency of welding, such as the Smart MIG technology which optimizes the welding parameters automatically based on the wire diameter and material thickness.

In terms of durability, the Lincoln Electric 400 is designed for rugged environments. Its heavy-duty construction, including a robust metal casing and protective features, ensures it can withstand the rigors of daily use in harsh conditions. Furthermore, the welder is often praised for its efficient cooling system, which prolongs the machine's lifespan and maintains optimal performance even during extended usage.

Portability is another key aspect of this welding machine. Weighing under 200 pounds, it is designed with mobility in mind. The integrated wheels allow for easy transportation between job sites, making it a practical choice for mobile welders and contractors.

In conclusion, the Lincoln Electric 400 stands out in the welding equipment market due to its multi-process capabilities, impressive power output, user-friendly interface, durability, and portability. It is engineered to exceed the expectations of professional welders, providing them with the tools needed for high-quality results across a variety of applications.