Lincoln Electric SVM145-B service manual Welding CV

C-9 C-9

ACCESSORIES

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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.

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”).

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FIGURE C.6

COMMANDER 300/LN-25 ACROSS THE ARC CONNECTION DIAGRAM

6 PIN		14 PIN
		AMPHENOL
AMPHENOL
		OPTIONAL K444-1
		REMOTE CONTROL
		LN-25
		WIRE FEEDER
ELECTRODE	TO WORK	WORK CLIP LEAD

TO WORK

TO WORK

COMMANDER 300