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E-3

THEORY OF OPERATION

E-3

 

 

 

FIGURE E.2 — LN-10 INPUT RECEPTACLE, CONTROL BOARD AND OPERATOR CONTROLS.

 

 

 

 

SOLENOID

 

 

 

 

TO GUN TRIGGER

 

 

 

 

AND

 

 

 

 

DUAL PROCEDURE

 

 

 

WIRE DRIVE

WIRE

 

 

 

 

 

 

 

RECEPTACLE

DRIVE

 

OPTIONAL

OPTIONAL

 

MOTOR

 

 

 

 

REMOTE

ROBOTIC

 

TACH FEEDBACK

 

CONTROL

INTERFACE

 

 

 

KIT

MODULE

 

 

INPUT

 

 

 

CURRENT SENSING

 

 

 

REED SWITCH

CABLE

CONTROL BOARD

 

RECEPTACLE

 

 

42VAC

 

 

 

 

 

 

 

GROUND

 

 

 

 

LEAD

 

 

 

 

PROTECTOR

 

VOLTS

WFS

DISPLAY

 

 

ENCODER

ENCODER

 

 

BOARD

 

 

 

 

 

 

 

 

KEYPAD

 

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INPUT RECEPTACLE, CONTROL BOARD AND OPERATOR CONTROLS

The 42 VAC input voltage is applied to the LN-10 through a 9-pin amphenol type receptacle. The remote control and trigger leads are also accessed through this 9-pin receptacle. The 42 VAC is rectified by a full wave bridge and sent to the control board where it is filtered. This filtered DC voltage is applied to a switching power supply. The switching power supply manufactures +12VDC and -12VDC regulated supplies for the control board circuitry. A +5VDC reg- ulated supply is also developed for the control board circuitry.

The control board receives commands from the user operated controls such as the volts encoder, the wire feed speed (WFS) encoder and the keypad. It also receives feedback information from the wire feed head as to the wire feed speed and the arc voltage. The control board compares the feedback information with the user command signals and generates the appro- priate signals to control wire feed speed, arc voltage and gas flow.

The current sensing switch and ground lead protector are connected to the control board via plug J1. The current sensing reed switch closes when welding cur- rent is established. This closure signals the control board to change from the run-in welding parameters to the preset welding wire feed speed and arc voltage. If the ground lead protector is activated, the trigger cir- cuit will be disabled and the WFS display will show “GLP”.

LN-10

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Lincoln Electric SVM154-A service manual Input RECEPTACLE, Control Board and Operator Controls

SVM154-A specifications

The Lincoln Electric SVM154-A is a powerful and versatile inverter-based welding machine designed for a wide range of applications. As a part of Lincoln Electric's esteemed portfolio, this model is particularly favored for its robust performance and cutting-edge technologies, making it ideal for both professional fabricators and hobbyists alike.

One of the standout features of the SVM154-A is its compact and lightweight design, which enhances portability without compromising power. Weighing significantly less than traditional welding machines, it allows welders to easily transport the equipment to various job sites. This feature is particularly beneficial in industries where mobility is essential.

Equipped with advanced inverter technology, the SVM154-A delivers a stable and smooth arc, providing consistent welding performance even in challenging conditions. The inverter design also contributes to energy efficiency, allowing users to save on operational costs while enjoying superior performance. The machine supports both MIG and TIG welding processes, which adds to its versatility. This adaptability makes it suitable for a range of materials including mild steel, stainless steel, and aluminum.

Another notable characteristic is its user-friendly interface. Designed with the welder in mind, the SVM154-A includes intuitive controls that simplify settings adjustments and operational processes. This ergonomic layout allows for ease of use, even for beginners, while still offering the adjustments that experienced welders appreciate for customizing their welds.

The SVM154-A also includes several safety features, such as thermal overload protection and a dynamic power control, ensuring safe operation while maintaining high productivity. Users benefit from features that protect both the machine and the operator, making it a reliable choice for long hours of work.

Moreover, Lincoln Electric's commitment to durability is evident in the SVM154-A's construction. Built with high-quality materials, this welding machine is designed to withstand the rigors of daily use, ensuring longevity and reliability over time.

In summary, the Lincoln Electric SVM154-A stands out for its portability, versatility, and user-centric design. With advanced inverter technology that promotes energy efficiency and a stability for various welding processes, it serves as a valuable tool for both professionals and hobbyists seeking to achieve high-quality welds across different applications. Its combination of advanced features, safety mechanisms, and rugged durability positions the SVM154-A as a top choice in the welding equipment market.