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F-73

TROUBLESHOOTING & REPAIR

F-73

 

WELD CONTROL FEEDBACK TEST (CONTINUED)

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16.If the voltage readings are different, check the wiring and connections between the welding terminals and the control PC board. See the wiring diagram.

17.Connect the millivolt meter probes between lead #206S+ (P6-2) and lead 204S- (P6-1). See Wiring Diagram. If the machine is cur- rently producing 200 amps the millivolt meter should read about 25 millivolts.

18.If the machine cannot produce 200 amps of weld current, the correct millivolt signal will need to be calculated by dividing the reading displayed on the external ammeter by 8. See the following explanation.

19.The shunt used in this machine will produce 50 millivolts at a load of 400 amps, or 8 amps per millivolt.

20.To calculate the correct millivolt signal for a given load, you divide the number of amps displayed on the ammeter by 8.

Example: If your ammeter reads 75, (75/8 = 9.4) If the shunt is working correctly, and the wiring between the shunt and the control PC board is in good condition, the meter connect- ed at the control PC board should be reading about 9.4 millivolts.

21.If the millivolt reading is incorrect, check the wiring between the shunt and the control PC board for damage, grounds, and faulty con- nections. If the wiring is good, the shunt and lead assembly is faulty and should be replaced.

22.Perform the Case Cover Replacement Procedure.

VANTAGE® 400

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Lincoln Electric 400 service manual Perform the Case Cover Replacement Procedure

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.