Miller Electric OM-842 manual O P B U T T O N D E T E C T, X X X X X X X

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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.

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

# 0 X W I R E – F E E D

S T A R T

D E L A Y = X X .X

S E C.

 

 

8.Define the wire feed start delay as desired.

Wire feed start delay is the amount of time between the end of initial current and when the wire feed user relay (see Section 2-3) changes states. A delay time of 0 means the wire feed relay changes state immediately at the end of initial current. A delay time of 3.5 means the relay changes state 3.5 seconds after the end of ini- tial current.

The wire feed relay change cannot be delayed beyond the end of weld current. When weld current ends, the wire feed relay changes states whether or not the de- fined start delay time has elapsed.

The range for start delay time is 0.0 to 25.0 seconds, in increments of 0.1 seconds.

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

# 0 X W I R E – F E E D

S T O P

D E L A Y = X X .X

S E C.

 

 

10.Define the wire feed stop delay as desired.

Wire feed stop delay is the amount of time between the end of weld current and when the wire feed user relay (see Section 2-3) changes states. A delay time of 0 means the wire feed relay changes state immediately at the end of weld current. A delay time of 7.0 means the relay changes state 7.0 seconds after the end of weld current.

The wire feed relay change cannot be delayed beyond the end of postflow. When postflow ends, the wire feed relay changes states whether or not the defined stop delay time has elapsed.

The range for stop delay time is 0.0 to 25.0 seconds, in increments of 0.1 seconds.

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

* * * * * * D R Y R U N

* * * * * *

U S E R E M O T E T O

S T A R T

12.If desired, press Start/Increase on the Remote Pend- ant to carry out a dry run of the program (see Section 5-7 for information on the dry run feature). To place the microprocessor control in the Ready condition, press Right/Increase.

13.In the Ready condition the microprocessor control is ready to have another program entered or to execute a program. For information on executing a program, see Section 6.

E.Procedure Following Pulse Mode Definition For Semi-Automatic 2, 3, And 4 Modes

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. Define the final slope time as desired.

3.Press Right/Increase, and the display shows: a. For Semi-Automatic 2 and 3 modes:

# 0 X

F I N A L

A M P S = X X X .X

b. For Semi-Automatic 4 mode:

#

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 (if applicable) and amper- age 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:

S T O P B U T T O N D E T E C T

>X X X X X X X X X X <

6.Pressing Parameter Select toggles the display be- tween stop button detect Enabled and Disabled. When the desired choice is shown, press Right/Increase to advance to the next display. The display shows:

# 0 X

P O S T F L O W

TI M E = X X .X

7.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 Description OM-842162074BProcesses 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 dangereuxLE Bruit peut affecter l’ouïe LE Soudage peut provoquer un incendie ou une explosionDES Particules Volantes peuvent blesser les yeux Risque D’INCENDIE OU LA Chute DE L’APPAREIL peut blesser’EMPLOI Excessif peut DES Organes Mobiles peuvent provoquer des blessuresConsignes relatives aux stimulateurs cardiaques Principales normes de sé curitéInformation sur les champs é lectromagné tiques Remote 4 Socket Information InstallationConnecting Remote Pendant Or Equivalent User-Wired Control Pulse signal, and for a wire feeder User Relay ContactsSetting DIP Switch SW1 Rocker Switch Settings = On = OffSafety Equipment OperationControls Work ClampDigital Display Mode Selector SwitchAmmeter And Voltmeter Program/Run/Reset Keyed Switch Parameter Select Push ButtonRight/Increase Push Button Left/Decrease Push ButtonShielding Gas Purge Push ButtonRemote Pendant Introduction to Programming GeneralWeld Sequence Balance ControlAutomatic Mode Sequence Semi-Automatic Mode SequenceModes Of Operation Start Level Not Shown Time & level programmedWeld/Peak Initial Current C Final SlopeSlope Current B Weld/PeakInitial Current C Final Slope Current B Current D Preflow 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 X# 0 X a R C C O N T R O L R C E N T a G E = 0 0 0 % Smaw ModeEditing a Program 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 DownIntroduction DiagnosticsOverheating Protection RAM Test Diagnostics ProgramProgramming Push Button Tests 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 SupportMiller Electric Mfg. Co Model Name Serial/Style Number Purchase DateDistributor Address City State Zip

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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