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E-2

 

 

THEORY OF OPERATION

 

 

E-2

 

 

 

 

 

 

 

 

 

FIGURE E.2 – INPUT LINE VOLTAGE

 

 

 

 

 

 

 

 

 

 

 

WORK

 

 

 

 

 

 

 

 

NOZZLE

 

 

 

POWER BOARD

 

 

 

ELECTRODE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAIN

 

 

TORCH

 

 

 

CR 1&2

 

OUTPUT

BOARD

CONNECTOR

 

 

 

 

TRANSFORMER

 

 

 

RELAY

 

 

 

 

 

 

 

 

 

 

 

 

 

E

INPUT

 

 

IGBT

 

 

 

 

L

LINE

INPUT

 

 

 

 

 

E

 

 

 

 

 

 

C

SWITCH

RECTIFIER

 

 

 

 

 

 

T

 

 

 

 

 

 

 

 

R

 

 

 

CAPACITOR

 

 

 

 

O

 

 

 

 

 

 

 

D

 

 

 

 

 

 

 

 

E

 

 

R

 

 

 

 

CHOKE

S

 

 

E

IGBT

 

 

 

PILOT

O

 

 

C

 

 

TRANSISTOR

L

 

 

O

 

 

 

 

 

E

 

 

 

 

 

 

 

N

 

 

N

 

 

 

 

 

 

 

 

 

 

 

 

O

 

 

N

 

 

 

 

 

 

 

 

 

 

 

 

I

 

 

E

 

 

 

 

 

 

 

 

 

 

 

 

D

 

 

C

IGBT

 

 

 

 

 

 

T

 

 

 

 

 

 

 

 

CURRENT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S

 

TRANSFORMER

 

 

TRIGGER & SAFETY

 

 

 

 

 

 

 

 

W

 

 

 

 

 

 

 

 

I

CAPACITOR

 

 

 

 

AIR

 

 

T

 

 

 

 

 

 

C

 

 

 

 

 

SOLENOID

 

 

H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IGBT

 

 

 

 

 

 

AIR

P

 

 

TRIGGER & SAFETY

 

 

 

 

R

 

 

 

 

 

 

 

PRESSURE

O

 

 

 

 

 

REMOTE

 

SWITCH

T

CR 1& 2

IGBT

 

 

 

 

"A"

E

RELAY

 

 

 

INTERFACE

 

 

C

DRIVE

GATE

 

 

 

RECEPTACLE

 

 

T

SIGNALS

 

 

 

 

 

 

SIGNAL

ELECTRODE & TRANSFER

 

 

 

 

L

I

 

 

 

 

 

O

 

 

CURRENT FEEDBACK

 

 

 

 

E

N

SIGNAL

 

 

 

 

 

 

 

 

PILOT ENABLE

 

 

 

 

 

 

 

 

 

 

 

 

A

 

 

CONTROL BOARD

ELECTRODE SOLENOID ENABLE

 

 

 

 

 

 

 

 

 

 

 

D

 

 

 

 

 

 

 

 

18/36VAC

 

AIR SOLENOID ENABLE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R

A

T

S

 

E

I

H

A

 

R

E

F

THERMOSTATS

A

 

L

R

E

 

D

M

T

 

 

Y

O

A

Y

 

 

W

L

 

OUTPUT

CONTROL

DISPLAY BOARD

12VAC

24VAC

115VAC

AUXILIARY

TRANSFORMER FAN

MOTOR

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GENERAL DESCRIPTION

The PRO-CUT 80 is a constant current, continuous control plasma cutting power source. The inverter based power supply design is controlled by a micro- processor control board. The control system has a safety mechanism to insure that the nozzle and elec- trode are in place before cutting or gouging. The PRO- CUT 80 initiates the plasma arc with a simple, yet reli- able, touch start mechanism. This system eliminates many of the problems associated with hi-frequency type start systems. When powered up, the machine performes some rudimentary self diognostics.

INPUT LINE VOLTAGE, SWITCH AND MAIN TRANSFORMER

The single-phase or three-phase input power is con- nected to the machine, via an input line cord, to a switch located on the front panel.

A reconnect panel and voltage range switch allow the user to configure the machine for either a low or high input voltage and also connect the auxiliary trans- former for the appropriate input voltage.

The auxiliary transformer develops the appropriate AC voltages to operate the cooling fan, the control board and the plasma output board.

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NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.

PRO-CUT 80

Page 32
Image 32
Lincoln Electric SVM146-A service manual Theory of Operation, Input Line VOLTAGE, Switch and Main Transformer

SVM146-A specifications

Lincoln Electric's SVM146-A is a versatile and powerful multi-process welding machine designed for professionals in various industries. Known for its robustness and reliability, this machine excels in both performance and user-friendly features, making it a popular choice among welders.

One of the standout features of the SVM146-A is its multi-process capability, allowing users to perform MIG, TIG, and stick welding using a single unit. This versatility is enhanced by Lincoln Electric's innovative Auto-Set technology, which automatically adjusts the machine's settings based on the selected process and materials being welded. This feature significantly reduces the time spent on setup and helps ensure optimal weld quality, even for less experienced operators.

The SVM146-A is powered by a reliable inverter design, which provides greater efficiency compared to traditional transformer-based machines. This compact and lightweight design allows for easy transport, making it ideal for job sites or remote locations. The inverter technology also contributes to enhanced arc stability and better overall performance, providing high-quality welds in less time.

Another key characteristic of this welding machine is its robust construction, designed to withstand the rigors of heavy industrial use. The SVM146-A features a durable chassis and control panel, ensuring longevity and reliability under challenging working conditions. Additionally, its intuitive interface allows users to easily navigate settings and make adjustments as needed.

Safety is a paramount concern in welding applications, and the SVM146-A is equipped with several safety features, including over-temperature and over-voltage protection, ensuring that the machine operates safely even in demanding environments. It also features a start inhibit system, preventing the machine from being started under unsafe conditions.

The SVM146-A is compatible with a variety of welding accessories and consumables, enhancing its flexibility and usability across different applications. Whether it’s automotive repair, heavy fabrication, or maintenance work, this welding machine adapts to various tasks, making it a valuable addition to any professional's toolkit.

In conclusion, Lincoln Electric's SVM146-A stands out as a multi-process welding machine that combines advanced technology, robust design, and user-friendly features. It is engineered for performance and reliability, making it an excellent investment for professionals dedicated to achieving high-quality welds.