Miller Electric OM-842 - Manuel (Page 39)

OM-842 Page 35
10. Wear welding helmet with proper filter lens according to
ANSI Z49.1.
11. Be sure applicable remote control device is connected
as follows:
a. Semi-Automatic 1 Mode:
Connect Remote Pendant to Remote 4 receptacle
RC2.
b. Semi-Automatic 2 Mode:
Connect Remote Pendant to Remote 4 receptacle
RC2.
c. Semi-Automatic 3 Mode:
Connect Remote Pendant to Remote 4 receptacle
RC2.
d. Semi-Automatic 4 Mode:
Connect Remote Pendant to Remote 4 receptacle
RC2.
e. Semi-Automatic 5 Mode:
Do not make connections to Remote 4 receptacle
RC2 at this time.
12. Energize welding power source.
13. If using the Semi-Automatic 5 mode, connect Remote
Pendant to Remote 4 receptacle RC2 at this time.
14. Be sure the desired program is active before executing
a program. The active program is indicated in the appli-
cable repeating display (see Section 5-1F). To select a
different program, press Parameter Select while the re-
peating displays are shown. This increases the
program number.
15. Begin welding, observing the operation procedures for
the applicable Semi-Automatic mode (see Sections
6-2B through 6-2F).
16. In all Semi-Automatic modes, the voltage and amper-
age meters display the weld voltage and amperage
while welding. The weld sequence displays are shown
on the digital display, with time values changing to re-
flect events being carried out.
B. Operation Procedures For Semi-Automatic 1
Mode
1. When the unit is in the Ready condition (see Section
5-1F), momentarily press Start/Increase to begin the
weld sequence.
2. During the Weld Time portion of the program, the Start/
Increase or Decrease push buttons may be pressed
and held to modify the weld current level within the de-
fined amperage adjustment limits (see Section 2-4).
The programmed values will not be affected.
3. Before the weld sequence reaches Weld Time, the
Stop push button may be pressed to end the program
prematurely and send the weld sequence to postflow.
4. The Stop push button must be pressed during Weld
Time to signal the end of weld/peak current. When Stop
is pressed, the weld sequence enters final slope. Once
Weld Time is terminated, the Stop push button has no
affect on program operation.
5. After postflow is timed out, the control unit returns to the
Ready condition and waits for the next closure of the
Start/Increase push button. If Start/Increase is pressed
during postflow, the program restarts the weld se-
quence from the beginning without preflow timing.
C. Operation Procedures For Semi-Automatic 2
Mode
1. When the unit is in the Ready condition (see Section
5-1F), momentarily press Start/Increase to begin the
weld sequence. After arc initiation at initial current, the
control unit maintains the programmed initial current
value.
2. Start/Increase must be pressed to signal the end of ini-
tial time and the beginning of initial slope. Following
initial slope, the control unit maintains Weld Time cur-
rent.
3. Start/Increase must be pressed to signal the end of
Weld Time and the beginning of final slope. Following
final slope, the control unit maintains the arc at the final
current level
4. Start/Increase must be pressed to signal the end of fi-
nal current and the beginning of postflow.
5. After postflow is timed out, the control unit returns to the
Ready condition and waits for the next closure of the
Start/Increase push button. If Start/Increase is pressed
during postflow, the programs restart the weld se-
quence from the beginning without preflow timing.
6. The Stop push button is not functional in this mode.
However, the existence of the arc is monitored by the
control unit. If the arc is manually broken, the program
goes directly to postflow.
D. Operation Procedures For Semi-Automatic 3
Mode
1. When the unit is in the Ready condition (see Section
5-1F), press and hold the Start/Increase push button to
begin the weld sequence. After arc initiation at initial
current, the control unit maintains the programmed ini-
tial current value.
2. Release the Start/Increase to signal the end of initial
time and the beginning of initial slope. Following initial
slope, the control unit maintains the programmed weld
current.
3. Press and hold Start/Increase to signal the end of Weld
Time and the beginning of final slope. Following final
slope, the control unit maintains the arc at the final cur-
rent level.
4. Release Start/Increase to indicate the end of final cur-
rent and the beginning of postflow.
5. After postflow is timed out, the control unit returns to the
Ready condition and waits for the next maintained clo-
sure of the Start/Increase push button. If Start/Increase
is pressed and held during postflow, the program re-
starts the weld sequence from the beginning without
preflow timing.
6. The Stop push button is not functional in this mode.
However, the existence of the arc is monitored by the
control unit. If the arc is manually broken, the program
goes directly to postflow.
E. Operation Procedures For Semi-Automatic 4
Mode
1. When the unit is in the Ready condition (see Section
5-1F), momentarily press Start/Increase to begin the
weld sequence. After arc initiation at initial current, the