Miller Electric OM-842 - Manuel (Page 35)

OM-842 Page 31
5-5. SMAW Mode
If needed, see Section 5-1B for
information on selecting and defining
a parameter.
NOTE
1. Turn on welding power source, if applicable.
2. Place the Mode Selector switch in the SMAW position.
3. Place the Program/Run/Reset keyed switch in the Re-
set position, and then in the Program position. The
initial displays will be shown.
4. When the repeating displays (explained in Section
5-1F) are shown, press Right/Increase.
If the Process Selector switch is in the ac output posi-
tion, go to Step 5. If the Process Selector switch is in a
dc output position, go to Step 8.
5. The display shows:
# 0 X B A L A N C E C O N T R O L
E N = X X % E P = X X %
6. If applicable, define the program number (see Section
5-1C). Define the electrode negative value for the ac
output square wave (see Section 4-3) as desired.
The range for percentage of waveform in electrode
negative is 46% to 68%, in increments of 2%.
7. Press Right/Increase, and go to Step 8.
8. The display shows:
# 0 X S T A R T L E V E L
T I M E = .X X X A M P S = X X X .X
9. If applicable, define the program number (see Section
5-1C). Define the start level time and amperage as de-
sired.
When properly used, start level eases arc starting by
allowing the use of an amperage value that is higher
than initial amperage for a short length of time.
The range for start level time is 0.0 to 15.0 seconds, in
increments of 0.1 seconds. The range for start level
amperage varies from 2.0 to 400.0 amps, in increments
of 1.0 amperes.
10. Press Right/Increase, and the display shows:
# 0 X W E L D
A M P S = X X X .X
11. Define the weld current as desired.
The range for weld current varies from 2.0 to 400.0
amps, in increments of 1.0 amperes.
12. Press Right/Increase, and the display shows:
# 0 X A R C C O N T R O L
P E R C E N T A G E = 0 0 0 %
13. Arc control increases short-circuit amperage to help
start an arc or make vertical or overhead welds.
The range for arc control is 0% to 100%, in increments
of 1%.
14. Press Right/Increase, and the display shows:
C U R R E N T C O N T R O L
< X X X X X X X >
15. Pressing Parameter Select toggles the display be-
tween Panel and Remote. When Remote is defined,
weld amperage can be varied by a remote amperage
control device up to the user-defined weld current level.
When Panel is defined, weld amperage is the value de-
fined as weld current.
Whichever option is showing when this display is ex-
ited will be in effect. Use the Parameter Select push
button to display the desired option (Panel or Remote).
16. Press Right/Increase. The microprocessor control will
enter the Ready condition.
17. 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.
5-6. Editing A Program
To edit an existing program, carry out the following:
1. Turn on welding power source, if applicable.
2. Use the Mode Selector switch to select the mode of the
program to be edited.
3. Place the Program/Run/Reset keyed switch in the Pro-
gram position.
4. When the repeating displays are shown, press the
Right/Increase or Left/Decrease push button until the
display to be edited is shown.
5. Edit the desired parameter(s). If needed, see Section
5-1B for information on selecting and defining parame-
ters. See Section 5-1C for information on changing the
program number in a display to access multiple pro-
grams.
6. Continue accessing displays and editing parameters
until editing is complete. The newly entered parame-
ters become a part of the program as soon as they are
entered.
7. To lock out program changes and prepare for program
execution, place the Program/Run/Reset keyed switch
in the Run position.
8. To prepare for program execution while remaining in
Program, press Right/Increase or Left/Decrease until
the Ready condition is active (see Section 5-1F).