Miller Electric OM-842 manual Setting DIP Switch SW1, Rocker Switch Settings = On = Off

Page 15

2-4. Setting DIP Switch SW1

4

2

1

3

Actual numbers 1 thru 8 below rocker switches are upside down. Positions 5 and 6 are not used.

Set DIP switch SW1 rocker switch positions as follows:

1Control Box Front Panel

2Retaining Screw Location

Loosen retaining screw, and open hinged front panel.

3Microprocessor Board PC5

4DIP Switch SW1

5Positions 7 And 8

Set 7 and 8 according to table to se- lect Semi-Automatic Modes 1 thru 5.

6 Position 4

Set Off to run diagnostics program.

Set On to stop diagnostics pro- gram, and for all other operations.

7 Position 3

Use position 3 to select whether pulses are defined as frequency or time values.

Set Off to define as frequency.

Set On to define as time.

8 Positions 1 And 2

In Automatic and Semi-Automatic 1 modes, weld amperage can be ad- justed up or down during weld using

4

5

6

7

8

 

 

 

 

 

8

7

6

5

4

3

2

1

Rocker Switch Settings:

= On

= Off

remote pendant. Define amperage adjustment range limits by setting positions 1 and 2 according to table.

Close front panel and tighten retain- ing screw after setting SW1.

Position

Position

Defined

Semi-Automatic

7

8

Mode

 

 

 

On

On

*1

 

 

 

On

Off

2

 

 

 

Off

On

3

 

 

 

Off

Off

4

 

 

 

On

On

*5

 

 

 

 

 

Defined

 

 

Amperage

Position

Position

Adjustment

1

2

Limit

 

 

 

On

On

± 5 Amperes

 

 

 

On

Off

± 10 Amperes

 

 

 

Off

On

± 20 Amperes

 

 

 

Off

Off

± 40 Amperes

 

 

 

*Semi-Automatic 1 mode is defined when remote Stop switch is connected. Semi-Automatic 5 mode is defined when remote Stop switch is not connected.

Tools Needed:

Ref. ST-800 194 / Ref. ST-162 477-A

OM-842 Page 11

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Contents OM-842162074B ProcessesDescription From Miller to You Table of Contents Page Electric Shock can kill Symbol UsageMarks a special safety message Arc Welding HazardsBuildup of GAS can injure or kill ARC Rays can burn eyes and skinWelding can cause fire or explosion Flying Metal can injure eyesPrincipal Safety Standards About Pacemakers EMF InformationLES Fumé ES ET LES GAZ peuvent ê tre dangereux Signification des symbolesConsignes DE Securite Lire Avant Utilisation UN Choc É Lectrique peut tuerLE Soudage peut provoquer un incendie ou une explosion DES Particules Volantes peuvent blesser les yeuxLE Bruit peut affecter l’ouïe DES Organes Mobiles peuvent provoquer des blessures Risque D’INCENDIE OULA Chute DE L’APPAREIL peut blesser ’EMPLOI Excessif peutPrincipales normes de sé curité Information sur les champs é lectromagné tiquesConsignes relatives aux stimulateurs cardiaques Installation Connecting Remote Pendant Or Equivalent User-Wired ControlRemote 4 Socket Information User Relay Contacts Pulse signal, and for a wire feederRocker Switch Settings = On = Off Setting DIP Switch SW1Work Clamp Safety EquipmentOperation ControlsMode Selector Switch Ammeter And VoltmeterDigital Display Left/Decrease Push Button Program/Run/Reset Keyed SwitchParameter Select Push Button Right/Increase Push ButtonPurge Push Button Remote PendantShielding Gas Balance Control Introduction to ProgrammingGeneral Weld SequenceStart Level Not Shown Time & level programmed Automatic Mode SequenceSemi-Automatic Mode Sequence Modes Of OperationWeld/Peak Initial Current C Final Slope Current B Current D PreflowWeld/Peak Initial Current C Final SlopeSlope Current B Weld/Peak Initial C Current D Final SlopeSlope Current B Semi-Automatic 4 Mode SequenceInitial Slope Weld/Peak Current Final Slope Final Current Smaw ModeWeld/Peak Initial Current B Final Slope Slope Preflow PostflowProgramming Procedure Up To Pulse Mode Selection Automatic ModeProcedure With Pulse Mode On, Pulses Defined In Time Values S T F L O W Procedure With Pulse Mode On, Pulses Defined As a FrequencyProcedure Following Pulse Mode Definition N a LE R E M O T E T O A R T Semi-Automatic ModeA R T O P# 0 X I N I T I a L P S = X X X Procedure With Pulse Mode On, Pulses Defined As a Frequency X X X X X X X O P B U T T O N D E T E C TManual Gtaw Mode X X X X R R E N T C O N T R O LSmaw Mode Editing a Program# 0 X a R C C O N T R O L R C E N T a G E = 0 0 0 % N K P O S I T I O N X X X X X X X Dry Run FeatureStop Watch Feature Linking ProgramsM B I N E P O S I T I O N X X I S X X X X X X Combining ProgramsM B I N E M O D E O G R a M L I N K M O D EGas Tungsten Arc Welding Gtaw In The Semi-Automatic Modes Gas Tungsten Arc Welding Gtaw In The Automatic ModeShared Initial Procedure Sequence of OperationOperation Procedures For Semi-Automatic 4 Mode Operation Procedures For Semi-Automatic 1 ModeOperation Procedures For Semi-Automatic 2 Mode Operation Procedures For Semi-Automatic 3 ModeOperation Procedures For Semi-Automatic 5 Mode Gas Tungsten Arc Welding Gtaw In The Manual ModeShutting Down Shielded Metal Arc Welding SmawExecuting Linked Programs Executing Combined ProgramsDiagnostics Overheating ProtectionIntroduction Diagnostics Program Programming Push Button TestsRAM Test Repeating Test Displays Program/Run/Reset Keyed Switch TestsMode Selector Switch Test Output Selector Switch TestR G E B U T T O N S T W O R K I N G O P E R L YE a S E T U R N K N O B T O Purge Push Button Test+10 Volt DC Reference Test User Relays Background Relay TestArc Starter Relay Test Gas Solenoid Relay TestS H D E C R E a S E B U T T O N R E M O T E Remote Pendant TestM O T E P E N D a N T S T R E M O T EInput Contactor Test Current Detect TestP U T C O N T a C T O R I S T D E T E C T E D P U T C O N T a C T O R D E T E C T E DCircuit Diagram For Remote Pendant Electrical DiagramsWiring Diagram For MPC Module Circuit Diagram For Welding Power Source And MPC SC-182 947-B Main Assembly Parts List110 Dia Part Mkgs Description QuantityNAMEPLATE, order by model and serial number 158 078 010132 Page Page Page Page Support ServiceModel Name Serial/Style Number Purchase Date Distributor Address City State ZipMiller 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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