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.

OM-842 Page 24

Page 28
Image 28
Miller Electric OM-842 manual Procedure With Pulse Mode On, Pulses Defined As a Frequency, N a L, S T F L O W

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.