Lincoln Electric SVM150-A service manual Return to Section TOC To Section TOC

C-6 C-6

ACCESSORIES

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CONNECTION OF THE LN-25 TO THE RANGER 250 “ACROSS THE ARC”

WITH K857 REMOTE CONTROL (SEE FIGURE C.4.)

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.4 shows the electrode connected for negative polarity. To change polarity, shut the welder off and reverse the electrode and work cables at the Ranger 250 output terminals.

3.Connect the K857 Remote Control to the 6-pin amphenol on the Ranger 250.

4.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.

CAUTION

If you are using an LN-25 without an internal contactor, the electrode will be “HOT” when the Ranger 250 is started.

6.Set the “MODE” switch to “CV-WIRE.”

7.Set the “WELD TERMINALS” switch to “WELD

TERMINALS ON.”

8.Set the “VOLTMETER” switch to “+” or “-” depending on the polarity chosen.

9.Adjust wire feed speed at the LN-25 and adjust the welding voltage with the K857 if optional remote control is used.

10.Adjust the “ARC” control to “0” initially and adjust to suit.

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5.Place the “IDLER” switch in the “AUTO” or “HIGH” position, as desired.

FIGURE C.4 – RANGER 250/LN-25 ACROSS THE ARC

CONNECTION DIAGRAM WITH K857 REMOTE CONTROL

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14-PIN AMPHENOL

(RANGER 300 DLX ONLY)

+ –

6-PIN	OPTIONAL K857
AMPHENOL	REMOTE CONTROL

LN-25

WIRE FEEDER

WORK CLIP LEAD

TO WORK

TO WORK

ELECTRODE CABLE

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RANGER 250