Lincoln Electric COMMANDER SVM145-B Service Manual page 37

C-9
CONNECTION OF THE LN-25 TO THE
COMMANDER 300 "ACROSS THE ARC"
(SEE FIGURE C.6.)
1. Shut the welder off.
2. Connect the electrode cable from the LN-25 to the
"-" terminal of the welder. Connect the work cable
to the "+" terminal of the welder.
NOTE: Welding cable must be sized for current and
duty cycle of application.
NOTE: Figure C.6 shows the electrode connected for
negative polarity. To change polarity, shut the welder
off and reverse the electrode and work cables at the
Commander 300 output terminals. Reverse the LN-25
polarity switch.
3. Attach the single lead from the LN-25 to the work
using the spring clip on the end of the lead. This is
only a sense lead – it carries no welding current.
4. Place the IDLER switch in the "AUTO" position.
COMMANDER 300/LN-25 ACROSS THE ARC CONNECTION DIAGRAM
6 PIN
AMPHENOL
ELECTRODE
ACCESSORIES
FIGURE C.6
14 PIN
AMPHENOL
TO WORK
TO WORK
COMMANDER 300
CAUTION
If you are using an LN-25 without an internal contactor,
the electrode will be "HOT" when the Commander 300
is started.
5. Set the OUTPUT RANGE switch to "WIRE
WELDING CV."
6. Set the WELDING TERMINALS switch to 'WELD-
ING TERMINALS ALWAYS ON."
7. Set the VOLTMETER switch to "+" or "-" depend-
ing on the polarity chosen.
8. Adjust wire feed speed at the LN-25.
9. Set the LOCAL/REMOTE switch to "REMOTE" if
a K444-1 remote control is used.
10. Adjust the ARC CONTROL to the desired level
("soft" or "crisp").
OPTIONAL K444-1
REMOTE CONTROL
LN-25
WIRE FEEDER
C-9
WORK CLIP LEAD
TO WORK