Lincoln Electric SVM127-A service manual Operation

B-12 B-12

OPERATION

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For Aluminum Wire

Each set of rolls should have their pressure set independent of the other. To do this, release and open the other quick release arm while making each adjustment. Follow the procedure below for each adjustment.

1.With low idle roll pressure, load the feeder so it’s ready for welding.

2.Run the feeder at a slow speed (about 100 IPM) and reduce the idle roll pressure until the idle roll stops rotating.

3.Slowly increase idle roll pressure until the idle roll just starts to rotate consistently with the drive roll without slippage, then add an extra 1/4 to 1/3 turn more idle roll pressure.

This pressure setting should be optimum for feed- ing and to avoid "bird-nesting" by allowing the drive roll to slip on the wire if a gun cable jam or stop- page occurs. If using harder or larger dia. alu- minum wires more idle roll pressure, if necessary, can be tolerated. However, if the pressure required to properly feed the aluminum wire also permits "bird-nesting," or excessive slippage results in aluminum pickup in the drive roll groove, the loading on the wire by the gun-cable or wire reel should be inspected and adjusted.

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LN-9 Wire Feeder