Lincoln Electric SVM127-A service manual General Description, Recommended Processes and Equipment

B-3 B-3

OPERATION

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GENERAL DESCRIPTION

The LN-9 2-Roll and 4-Roll semiautomatic wire feeder models feature the precise "set and forget" digital pro- cedure control. They are designed to achieve higher quality control and weld quality levels more easily. The arc voltage and wire feed speed can be set on a digital meter before the arc is struck and the procedure remains precisely set day in and day out.

The wire feed speed and arc voltage can be "SET" before or during welding, and the "ACTUAL" values can be read during welding. Wire feed speed and arc voltage will be held virtually constant regardless of input voltage variation, feeding force, loading of the power source, ambient temperature changes or a volt- age drop in the electrode or ground circuit.

•Two drive rolls (driven) are used with calibrated idle roll pressure setting. Rolls are available for feeding

.030 thru 3/32" solid and .045 through .120" flux cored steel electrodes, as well as .035 through 1/16 aluminum wires.

•Four drive rolls (driven) are available and they work on a "quick release"mechanism for easy access to drive rolls and guide tubes. Drive roll kits are avail- able for the same electrode sizes as the 2-roll feeders.

RECOMMENDED PROCESSES AND EQUIPMENT

When combined with the broad selection of quality welding equipment and accessories, the LN-9 pro- vides a versatile precision welding system to meet the specific needs of Outershield® , Innershield® or sub- merged arc welding processes. The capabilities of the LN-9 2-Roll and 4-Roll wire feeders are:

Rated wire size range:

.030 through 3/32" solid wire electrode.

.045 through .120" Outershield® cored electrode.

.062 through 7/64" lnnershield® cored electrode.

Rated wire speed range:

50 through 600 inches per minute.

(1.27 through 15.2 meters per minute).

DC CONSTANT VOLTAGE POWER SOURCES

The following welding system power sources are avail- able for use with all LN-9 models:

The Idealarc® DC-250, DC-400, CV-400 and DC-600 are recommended for use with any LN-9 model. The Pulse Power 500 and DC650 Pro can also be used with the LN-9 with the installation of the optional K442- 1 Pulse Power Filter Kit.

SAM power sources may also be used.

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LN-9 Wire Feeder