Lincoln Electric RANGER 250 SVM150-A Service Manual page 31

C-7
CONNECTION OF THE LN-7 TO THE
RANGER 250 USING K584 CONTROL
CABLE (SEE FIGURE C.5.)
NOTE: If your LN-7 comes equipped with a K291 or
K404 input cable, refer to CONNECTION OF THE LN-
7 Using K867 UNIVERSAL ADAPTER, rather than this
discussion, to connect your Ranger 250 for wire feed
welding.
1. Shut the welder off.
2. Connect the electrode cable from the K584-XX
Control Cable to the "+" terminal of the welder and
to the LN-7 wire feeder. Connect the work cable to
the "-" terminal of the welder.
NOTE: Figure C.5 shows the electrode connected for
positive polarity. To change polarity, shut the welder off
and reverse the electrode and work cables at the out-
put terminals.
NOTE: Welding cable must be sized for current and
duty cycle of application.
3. Connect the input cable from the K584-XX Control
Cable to the 14-pin amphenol on the Ranger 250
and the input cable plug on the LN-7.
FIGURE C.5 – RANGER 250/LN-7 WITH 584 CONTROL CABLE CONNECTION DIAGRAM
-
-
ACCESSORIES
4. Set the "VOLTMETER" switch to "+" or "-" depend-
ing on the polarity chosen.
5. Set the "MODE" switch to the "CV-WIRE" position.
6. Place the "IDLER" switch in the "HIGH" position.
Any increase of the high idle engine RPM by changing
the governor setting or overriding the throttle linkage
will cause an increase in the AC auxiliary voltage. If
this voltage goes over 140 volts, wire feeder control cir-
cuits may be damaged. The engine governor setting is
preset at the factory – do not adjust above RPM spec-
ifications listed in this manual.
7. Place the "WELD TERMINALS" switch in the
"REMOTELY CONTROLLED" position.
8. Adjust wire feed speed at the LN-7 and adjust the
welding voltage with the optional remote control if
used.
9. Set the "ARC" control at "0" initially and adjust to
suit.
RANGER 250
CAUTION
C-7