Manuals / Lincoln Electric / Power Tools / Welder

Lincoln Electric SVM187-A Rotor Winding Movable Contacts, Min. open Position, First Step

Models: SVM187-A

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F-54

TROUBLESHOOTING AND REPAIR

F-54

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DEAD SHORT, 1ST STEP, AND OPEN REACTOR TESTS (continued)

 

 

 

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FIGURE F.17 – OUTPUT CONTROL UNIT

 

 

 

 

 

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ROTOR

WINDING

 

MOVABLE CONTACTS

 

to Section

to Master

 

Min. (open) Position

 

FIRST STEP

 

Return

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CONTACT

CONTACT SPRINGS

POSITION

 

 

INSULATED

 

 

 

 

 

 

FILLER

 

 

PROCEDURE

 

 

 

1.

If possible, bring the machine to normal tempera-

4. Begin rotating the output control until the output cur-

 

 

 

ture by connecting a load bank and operating the

rent changes, this is the first step or first turn of the

 

 

 

machine at 100% output (400 amps @ 36 volts) for

reactor coil. See Figure F.17. The output should

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about 30 minutes.

measure 200 to 300 Amps, at 0.2 to 4 Volts DC*.

 

 

 

Section

Master

2.

Remove the load; turn the Job Selector Rheostat to

A slightly high reading in the Min. position, with no clear

 

 

 

MAXIMUM, and the Current Control to MINIMUM

first step jump in output could indicate that the contacts

to

to

 

(Contacts on the insulated steel filler or “Open

are badly worn, and the contact fingers, rather than the

 

Reactor”).

contacts themselves, may be making contact with the

Return

Return

 

 

 

Unit Inspection and Service Procedure.

 

 

 

 

output control winding. Perform the Output Control

3.Short the output terminals and check that the machine output is 135 to 165 Amps, at 0.2 to 4 Volts

 

 

DC*.

No change in the output as the output control is slowly

 

 

If there is no output at the Min. setting of the output

increased

to the

first step would indicate

an open

 

 

Output Control Unit, or an open in the cables connect-

 

 

control, there is probably an open circuit in the Series

 

 

ing to it.

See the wiring diagram, and perform the

 

 

coils or the conductors connecting them. See the

 

 

Output Control

Unit Inspection and

Service

 

 

Internal generator diagram, and the wiring diagram

 

 

Procedure.

 

 

 

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.

 

 

 

 

 

 

 

 

 

 

 

 

Section

Master

A high output when the reactor is set to Min. would indi-

ues will be higher.

 

 

nal generator diagram.

 

 

 

 

cate a possible short in the series coils. See the inter-

* These values will be accurate if machine is operating

 

 

at normal temperature. If the machine is cold, the val-

 

 

 

Return to

Return to

 

 

 

 

 

 

SAE-400 SEVERE DUTY

 

 

 

 

 

 

 

 

 

 

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Lincoln Electric SVM187-A service manual Rotor Winding Movable Contacts, Min. open Position, First Step
Page 93 Page 95

SVM187-A specifications

The Lincoln Electric SVM187-A is a cutting-edge welding machine designed for professional welders and industrial applications. Known for its reliability and performance, it stands out in the competitive welding equipment market. This versatile machine is structured to handle various welding processes, making it a popular choice among users.

One of the primary features of the SVM187-A is its multifunctional capabilities. It supports MIG, TIG, and Stick welding, allowing users to switch between different welding techniques seamlessly. This flexibility makes it suitable for diverse applications, whether working on automotive repairs, metal fabrication, or construction projects. Additionally, the machine is equipped with a robust power output, ranging from low to high amperage settings, enabling users to tackle a wide array of materials, including mild steel, stainless steel, and aluminum.

The SVM187-A incorporates advanced inverter technology, which ensures increased efficiency and reduced energy consumption. This technology leads to a more compact design, making the unit portable and easy to transport. The lightweight construction of the machine does not compromise its durability; it is built with high-quality materials to withstand the rigors of a professional workshop.

Another notable characteristic of the SVM187-A is its user-friendly interface. The intuitive control panel includes digital displays for precise settings adjustments, ensuring accuracy during operation. Beginners and seasoned welders alike can benefit from the clear and straightforward design, reducing training time and enhancing productivity.

Safety features are paramount in the SVM187-A's design. The machine is equipped with thermal overload protection, ensuring that it operates within a safe temperature range to prevent damage and promote longevity. Additionally, it features automatic voltage regulation, which maintains a stable arc even under varying input voltage conditions.

In summary, the Lincoln Electric SVM187-A is a versatile, efficient, and user-friendly welding machine suited for both professional and industrial applications. Its multifunctionality, inverter technology, and robust safety features set it apart from competitors, making it a reliable choice for welders seeking to elevate their craftsmanship while ensuring safety and efficiency. This machine represents the innovation and quality that Lincoln Electric is renowned for in the welding industry.