Lincoln Electric 250 manual Connection of Lincoln ELEC- Tric Wire Feeders

A-8 INSTALLATION A-8

CONNECTION OF LINCOLN ELEC- TRIC WIRE FEEDERS

Connection of LN-7 or LN-8 to the Ranger 250

1.Shut the welder off.

2.Connect the LN-7 or LN-8 per instructions on the appropriate connection diagram in Section F

3.Set the "WIRE FEEDER VOLTMETER" switch to either "+" or "-" as required by the electrode being used.

4.Set the "MODE" switch to the "CV WIRE " posi- tion.

5.Set the "ARC CONTROL" knob to "0" initially and adjust to suit.

6 Set the "WELD TERMINALS" switch to the "REMOTELY CONTROLLED" position.

7. Set the "IDLE" switch to the "HIGH" position.

Connection of an LN-23P Wire Feeder to the Ranger 250

1.Shut the welder off.

2.Connect the LN-23P as per instructions on the appropriate connection diagram in Section F. (NOTE): When connecting an LN-23P to the Ranger 250, a K350-1 adapter kit must be used.

3.Set the "VOLTMETER" switch to "-".

4.Set the "MODE" switch to "CV WIRE" position.

5.Set the "WELD TERMINALS" switch to

"REMOTELY CONTROLLED".

6.Set the "ARC CONTROL" knob to "0" initially and adjust to suit.

7.Set the "IDLE" switch to the "AUTO" position. When not welding, the Ranger 250 engine will be at the low idle speed. If you are using an LN-23P with the K350-1 adapter kit, the electrode is not energized until the gun trigger is closed. When the gun trigger is closed, the current sensing cir- cuit will cause the Ranger 250 engine to go to the high idle speed, the wire will begin to feed and the welding process can be started. When welding is stopped, the engine will revert to low idle speed after approximately 12 seconds unless welding is resumed.

Connection of the LN-25 to the Ranger 250

The LN-25 with or without an external contactor may be used with the Ranger 250. See the appropriate connection diagram in Section F.

Note: The LN-25 (K431) Remote Control Module and (K432) Remote Cable are not recommended for use with the Ranger 250.

1.Shut the welder off.

2.For electrode Positive, connect the electrode cable from the LN-25 to the "+" terminal of the welder and work cable to the "-" terminal of the welder. For electrode Negative, connect the elec- trode cable from the LN-25 to the "-" terminal of the welder and work cable to the "+" terminal of the welder.

3.Attach the single lead from the front of the LN-25 to work using the spring clip at the end of the lead. This is a control lead to supply current to the wire feeder motor; it does not carry welding current.

4.Set the MODE switch to the "CV-WIRE " position.

5.Set the "WELD TERMINALS" switch to "WELD

TERMINALS ON"

6.Set the "ARC CONTROL" knob to "0" initially and adjust to suit.

7.Set the "IDLE" switch to the "AUTO" position. When not welding, the Ranger 250 engine will be at the low idle speed. If you are using an LN-25 with an internal contactor, the electrode is not energized until the gun trigger is closed.

8.When the gun trigger is closed, the current sens- ing circuit will cause the Ranger 250 engine to go to the high idle speed, the wire will begin to feed and the welding process started. When welding is stopped, the engine will revert to low idle speed after approximately 12 seconds unless welding is resumed.

Connection of LN-742, Spool Gun, and Cobramatic to Ranger 250

1.Shut the welder off.

2.Connect per instructions on the appropriate con- nection diagram in Section F.

RANGER 250