Miller Electric OM-842 manual Procedure With Pulse Mode On, Pulses Defined As a Frequency, N a L

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5.Define the peak time and background time values as desired.

Peak time is the length of time the pulse is at the peak level. Background time is the length of time the pulse is at the background level.

The ranges for both peak and background times are 0.5 to 5.0 seconds, in increments of 0.5 seconds.

6.Press Right/Increase, and the display shows:

# 0 X F R E Q U E N C Y =

X X .X X P U L S E S / S E C O N D

7.This display is for informational purposes. It indicates the calculated frequency of pulses per second.

8.Press Right/Increase.

If the Process Selector switch is in the ac output posi- tion, go to Section 5-2D. If the Process Selector switch is in a dc output position, go to Step 9.

9.The display shows:

# 0 X A V G C U R R E N T =

X X X .X A M P S

10.This display is for informational purposes. It indicates the calculated average current during pulsing.

11.Press Right/Increase, and go to Section 5-2D.

C.Procedure With Pulse Mode On, Pulses Defined As A Frequency

1.The display shows:

# 0 X

W E L D

TI M E = X X X .X

a.Define the weld current time as desired.

The range for weld current time is 0.0 to 999.9 sec- onds, in increments of 0.1 seconds.

2.Press Right/Increase, and the display shows:

# 0 X P U L S E

A p K

= X X X .X

P U L S E

A b K

= X X X .X

 

 

 

3.Define the ApK and AbK values as desired.

ApK defines the peak current during pulsing. AbK defines the background current.

The ranges for both ApK and AbK are 2.0 to 400 am- peres, in increments of 1.0 ampere.

4.Press Right/Increase, and the display shows:

# 0 X P U L S E S / S E C = X X .X

P U L S E P E A K % = X X

5.Define the pulse frequency per second and the per- centage of pulse time to be spent in pulse peak as desired.

The range for pulse frequency is 0.1 to 10.0 pulses per second, in increments of 0.1 pulses per second.

The range for percentage of pulse time to be spent in pulse peak is 5% to 95%, in increments of 1%.

6.Press Right/Increase.

If the Process Selector switch is in the ac output posi- tion, go to Section 5-2D. If the Process Selector switch is in a dc output position, go to Step 7.

7.The display shows:

# 0 X A V G C U R R E N T =

X X X .X A M P S

8.This display is for informational purposes. It indicates the calculated average current during pulsing.

9.Press Right/Increase, and go to Section 5-2D.

D. Procedure Following Pulse Mode Definition

1.The display shows:

# 0 X F I N A L S L O P E

TI M E = X X .X

2.Define the final slope time as desired.

The range for final slope time is 0.0 to 25.0 seconds, in increments of 0.1 seconds.

3.Press Right/Increase, and the display shows:

#

0 X

F I N A L

T

I M E = X X .X A M P S = X X X .X

4.Define the final current time and amperage as desired.

The range for final current level time is 0.0 to 25.0 sec- onds, in increments of 0.1 seconds. The range for final level amperage varies from 2.0 to 400 amperes, in in- crements of 1.0 amperes.

5.Press Right/Increase, and the display shows:

# 0 X

P O S T F L O W

TI M E = X X .X

6.Define the shielding gas postflow time as desired.

The range for postflow is 0.0 to 25.0 seconds, in incre- ments of 0.1 seconds.

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Contents Processes OM-842162074BDescription From Miller to You Table of Contents Page Symbol Usage Marks a special safety messageArc Welding Hazards Electric Shock can killARC Rays can burn eyes and skin Welding can cause fire or explosionFlying Metal can injure eyes Buildup of GAS can injure or killPrincipal Safety Standards EMF Information About PacemakersSignification des symboles Consignes DE Securite Lire Avant UtilisationUN Choc É Lectrique peut tuer LES Fumé ES ET LES GAZ peuvent ê tre dangereuxDES Particules Volantes peuvent blesser les yeux LE Soudage peut provoquer un incendie ou une explosionLE Bruit peut affecter l’ouïe Risque D’INCENDIE OU LA Chute DE L’APPAREIL peut blesser’EMPLOI Excessif peut DES Organes Mobiles peuvent provoquer des blessuresInformation sur les champs é lectromagné tiques Principales normes de sé curitéConsignes relatives aux stimulateurs cardiaques Connecting Remote Pendant Or Equivalent User-Wired Control InstallationRemote 4 Socket Information Pulse signal, and for a wire feeder User Relay ContactsSetting DIP Switch SW1 Rocker Switch Settings = On = OffSafety Equipment OperationControls Work ClampAmmeter And Voltmeter Mode Selector SwitchDigital Display Program/Run/Reset Keyed Switch Parameter Select Push ButtonRight/Increase Push Button Left/Decrease Push ButtonRemote Pendant Purge Push ButtonShielding Gas Introduction to Programming GeneralWeld Sequence Balance ControlAutomatic Mode Sequence Semi-Automatic Mode SequenceModes Of Operation Start Level Not Shown Time & level programmedInitial Current C Final Slope Current B Current D Preflow Weld/PeakWeld/Peak Initial Current C Final SlopeSlope Current B Semi-Automatic 4 Mode Sequence Weld/Peak Initial C Current D Final SlopeSlope Current BSmaw Mode Weld/Peak Initial Current B Final Slope SlopePreflow Postflow Initial Slope Weld/Peak Current Final Slope Final CurrentProgramming Automatic Mode Procedure Up To Pulse Mode SelectionProcedure With Pulse Mode On, Pulses Defined In Time Values Procedure With Pulse Mode On, Pulses Defined As a Frequency Procedure Following Pulse Mode DefinitionN a L S T F L O WSemi-Automatic Mode A R TO P E R E M O T E T O A R T# 0 X I N I T I a L P S = X X X Procedure With Pulse Mode On, Pulses Defined As a Frequency O P B U T T O N D E T E C T X X X X X X XManual Gtaw Mode R R E N T C O N T R O L X X X XEditing a Program Smaw Mode# 0 X a R C C O N T R O L R C E N T a G E = 0 0 0 % Dry Run Feature Stop Watch FeatureLinking Programs N K P O S I T I O N X X X X X X XCombining Programs M B I N E M O D EO G R a M L I N K M O D E M B I N E P O S I T I O N X X I S X X X X X XGas Tungsten Arc Welding Gtaw In The Automatic Mode Shared Initial ProcedureSequence of Operation Gas Tungsten Arc Welding Gtaw In The Semi-Automatic ModesOperation Procedures For Semi-Automatic 1 Mode Operation Procedures For Semi-Automatic 2 ModeOperation Procedures For Semi-Automatic 3 Mode Operation Procedures For Semi-Automatic 4 ModeGas Tungsten Arc Welding Gtaw In The Manual Mode Operation Procedures For Semi-Automatic 5 ModeShielded Metal Arc Welding Smaw Executing Linked ProgramsExecuting Combined Programs Shutting DownOverheating Protection DiagnosticsIntroduction Programming Push Button Tests Diagnostics ProgramRAM Test Program/Run/Reset Keyed Switch Tests Repeating Test DisplaysOutput Selector Switch Test Mode Selector Switch TestW O R K I N G O P E R L Y E a S E T U R N K N O B T OPurge Push Button Test R G E B U T T O N S T+10 Volt DC Reference Test Background Relay Test Arc Starter Relay TestGas Solenoid Relay Test User RelaysRemote Pendant Test M O T E P E N D a N T S TR E M O T E S H D E C R E a S E B U T T O N R E M O T ECurrent Detect Test Input Contactor TestP U T C O N T a C T O R D E T E C T E D P U T C O N T a C T O R I S T D E T E C T E DElectrical Diagrams Circuit Diagram For Remote PendantWiring Diagram For MPC Module Circuit Diagram For Welding Power Source And MPC SC-182 947-B Parts List Main AssemblyDia Part Mkgs Description Quantity NAMEPLATE, order by model and serial number 158078 010 110132 Page Page Page Page Service SupportDistributor Address City State Zip Model Name Serial/Style Number Purchase DateMiller Electric Mfg. Co

OM-842 specifications

The Miller Electric OM-842 is a versatile and powerful multi-process welding machine designed for professional welders who demand efficiency and reliability on the job. This industrial-grade welder is capable of handling various welding processes, including MIG, TIG, stick, and flux-cored welding, making it an ideal choice for a wide range of applications.

One of the standout features of the OM-842 is its robust output capability. With a maximum output of 400 amps, it can tackle thick materials with ease while maintaining exceptional arc stability. This output range allows for adaptability in different welding scenarios, whether working on heavy fabrication projects or lighter home repairs.

The OM-842 is also equipped with advanced inverter technology. This technology enhances the machine's efficiency and reduces energy consumption. Inverter machines are known for their lightweight design compared to traditional transformer welders, which makes the OM-842 more portable and easier to transport between job sites.

User-friendliness is paramount in the design of the OM-842. Its intuitive control panel features a digital display that provides real-time information on parameters such as voltage and amperage. This allows users to make quick and precise adjustments on the fly, enhancing productivity and ensuring optimal welding results.

Additionally, the OM-842 offers sophisticated weld control features, such as Auto-Set, which simplifies the setup process for beginners and experienced users alike. This technology automatically selects optimal parameters based on the material type and thickness, minimizing trial and error during welding.

The machine also includes a durable and rugged design, suitable for tough working conditions. The protective case and high-quality components ensure longevity and reliability even in adverse environments.

Safety is another critical aspect of the OM-842, with features such as over-temperature protection and a built-in fan to prevent overheating during extended use.

With its powerful performance, advanced technology, and robust design, the Miller Electric OM-842 stands out as an exceptional choice for welders seeking reliability and versatility in their welding operations, ultimately creating high-quality welds across various applications. Whether in a shop or on a construction site, the OM-842 is engineered to deliver outstanding results every time.
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