F-78

F-78

TROUBLESHOOTING & REPAIR

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TOC

ABNORMAL SOLENOID PULL & HOLD COIL WAVEFORMS

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SCOPE SETTINGS

SCOPE SETTINGS

 

 

1V

20 ms

200 MV

5 ms

 

 

Volts/Div

1V/Div.

Volts/Div

200 MV/Div.

 

 

Horizontal Sweep ...

20 ms/Div.

Horizontal Sweep

5 ms/Div.

 

 

Coupling

DC

Coupling

DC

 

 

Trigger

Internal

Trigger

Internal

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The scope pictures above are exam-

Section

Master

ples of a short at the output of both

 

 

 

 

the pull and the hold coil circuits on

to

to

the control PC board. The overcur-

rent circuits in the pull and hold coil

Return

Return

circuits will shut down the circuit when

 

 

 

 

an overcurrent is sensed, preventing

 

 

damage to the circuit. The waveform

 

 

on the left will cause the solenoid to

 

 

not pull in. The waveform on the right

 

 

will cause the solenoid to pull in, then

 

 

drop out. Check for shorted solenoid

 

 

coils and grounded leads.

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COMMANDER 400

 

 

Page 132
Image 132
Lincoln Electric SVM133-B service manual Abnormal Solenoid Pull & Hold Coil Waveforms, 200 MV

SVM133-B specifications

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Another notable characteristic of the SVM133-B is its compact and lightweight design. Weighing significantly less than traditional welding machines, it is highly portable, making it easy to transport to different job sites. Additionally, its rugged construction ensures durability, allowing it to withstand tough working conditions.

The SVM133-B is equipped with advanced safety features, such as overheat and overload protection, which safeguard both the machine and the user during operation. It also includes a digital display that provides real-time feedback on settings, voltage, and amperage, which enhances precision and control during welding tasks.

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One of the standout features is the capability to weld aluminum with ease, thanks to its spool gun compatibility. This feature sets the SVM133-B apart from many competitors, providing added value for users who require flexibility in their welding projects.

In summary, the Lincoln Electric SVM133-B stands out in the welding machine market due to its inverter technology, multi-process capabilities, portability, and robust safety measures. It embodies the perfect blend of innovation and practicality, making it a top choice for welders looking to enhance their skills and productivity across a wide array of applications. Whether for professional use or hobbyist projects, the SVM133-B offers a reliable solution for high-quality welding tasks.