Miller Electric OM-842 - Manuel (Page 41)

OM-842 Page 37
12. Enter the Ready condition (see Section 5-1F). The op-
erator now has control of the welding power source
contactor via the remote contactor control connected
to the Remote 14 receptacle.
13. Start welding as follows:
a. Be sure the desired program is active before ex-
ecuting a program. The active program is indicated
in the applicable repeating display (see Section
5-1F). To select a different program, press Param-
eter Select while the repeating displays are shown.
This increases the program number.
b. Use the remote contactor control to energize the
welding power source contactor. This initiates
preflow.
c. If high frequency is enabled, a high-frequency arc
initiation at the defined start current level can be
performed after preflow.
If high frequency is disabled, a touch or scratch
start at the defined initial current level can be per-
formed after preflow.
14. While welding, the voltage and amperage meters dis-
play the weld voltage and amperage. The weld
sequence displays show on the digital display, with
time values changing to reflect events being carried
out.
15. Weld output can be varied with the remote amperage
control. If pulsing is programmed On, the remote am-
perage control can increase the weld/peak and
background current levels up to the programmed maxi-
mum values. The remote amperage control can
decrease the weld/peak and background current lev-
els down to the defined initial current level.
If pulsing is programmed Off, the remote amperage
control can increase the weld current up to the pro-
grammed maximum weld level. The remote amperage
control can decrease the weld current down to the de-
fined initial current level.
16. To stop welding, use the remote contactor control to
deenergize the welding power source contactor. Post-
flow will be carried out.
17. After postflow is timed out, the control unit returns to the
Ready condition. The operator must use the remote
contactor control to energize the welding power source
contactor to start welding again. If the welding power
source contactor is energized during postflow, the pro-
gram restarts the weld sequence from the beginning
without preflow timing.
6-4. Shielded Metal Arc Welding (SMAW)
1. Be sure welding power source and related equipment
are installed as instructed in their respective Owner’s
Manuals.
2. Be sure desired weld program (or programs) has been
entered.
3. Connect a suitable Contactor/Amperage remote con-
trol to the Remote 14 receptacle.
4. Place Mode Selector switch in SMAW position.
5. Wear dry insulating gloves and clothing.
6. Connect work clamp to clean, bare metal at workpiece.
7. Select proper electrode.
8. Insert electrode into electrode holder.
9. Wear welding helmet with proper filter lens according to
ANSI Z49.1.
10. Energize welding power source.
11. Enter the Ready condition (see Section 5-1F).
12. Begin welding, observing the following:
a. Be sure the desired program is active before ex-
ecuting a program. The active program is indicated
in the applicable repeating display (see Section
5-1F). To select a different program, press Param-
eter Select while the repeating displays are shown.
This increases the program number.
b. A closure of the remote contactor control contacts
turns on the welding power source contactor. The
control unit waits for an arc to be initiated with the
stick electrode.
c. If Remote is enabled in the program (see Section
5-5), the remote control can be used to increase
the weld current up to the programmed maximum
weld level. The remote amperage control can de-
crease the weld current down to the minimum
current level the welding power source can pro-
vide.
d. If Remote is disabled in the program, the control
unit sets the weld output to the programmed weld
level value.
e. Opening the remote contacts turns off the welding
power source contactor.
f. While welding, the voltage and amperage meters
display the weld voltage and amperage.
6-5. Executing Linked Programs
1. Follow the Sequence Of Operation steps for the appli-
cable mode (Automatic, Semi-Automatic 1, or
Semi-Automatic 5) until the Ready condition is entered.
2. When the repeating displays are shown, press Param-
eter Select until the program number increases beyond
4. The Link mode will be active.
3. Be sure the Link position to be executed first is the first
one in the Link Position displays.
4. Press Start/Increase on the Remote Pendant to begin
linked program execution.
6-6. Executing Combined Programs
1. Follow the Sequence Of Operation steps for the appli-
cable mode (Automatic, Semi-Automatic 1, or
Semi-Automatic 5) until the Ready condition is entered.
2. When the repeating displays are shown, press Param-
eter Select until the program number increases beyond
4. The Link mode will be active.
3. Press Parameter Select again to enter the Combine
mode.
4. Press Start/Increase on the Remote Pendant to begin
combined program execution.
6-7. Shutting Down
1. Stop welding.