Welding Operation, Operating Steps | Lincoln Electric SVM 122-A

B-6

OPERATION

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WELDING OPERATION

OPERATING STEPS

LOCAL CONTROL

The following procedures are for using the Idealarc DC-400 in the local control mode of operation. For remote control of the machine, see the REMOTE CONTROL section.

Before operating the machine, make sure you have all materials needed to complete the job. Be sure you are familiar with and have taken all possible safety pre- cautions before starting work. It is important that you follow these operating steps each time you use the machine.

1.Turn on the main AC input power to the machine.

2.Set the VOLTMETER “+” or “-” switch to the appropriate position.

•Set toggle to “´Electrode Negative” position if the electrode is connected to the negative (-) output terminal.

•Set toggle to “Electrode Positive” position if the electrode is connected to the positive (+) output terminal.

3.Set the welding MODE switch to welding process being used.

•CV FCAW/GMAW

•CV Submerged Arc

•CC Stick/Tig

4.Set the OUTPUT CONTROL switch to “Local.” (Exception: when using an LN-9, LN-9 GMA, or NA-5 wire feeder, set the switch to “Remote.” Otherwise, the wire feeder may automatically shut down.

5.Set the OUTPUT TERMINALS switch to the desired mode.

6.Set the ARC FORCE CONTROL to midrange, 5-6. This control is for CC stick or TIG welding only. Adjust for best characteristics as necessary.

7.Set the ARC CONTROL to midrange, 3. This con- trol is for CV FCAW/GMAW welding only. Adjust as necessary for best pinch control.

8.Set the ON/OFF POWER toggle switch to the ON position (1).

•The power source pilot light glows.

•The fan starts.

REMOTE CONTROL

The toggle switch on the control panel labeled “Output Control Remote” gives you the option of controlling the machine output from a remote location. In the “Remote” position a wire feeder with remote control capabilities or a remote control device such as a K775 must be connected to the DC-400. Refer to the Accessories section for wire feeder installation infor- mation.

WELDING PROCEDURE RECOMMENDATIONS

Select Mode Switch position based on type of welding to be done.

1.FCAW/GMAW Welding/Other Open Arc Processes: Use the CV FCAW/GMAW mode.

2.Submerged Arc Welding: Use the CV Submerged Arc mode. If performing high speed welding, switch between the CV Submerged Arc and the CV FCAW/GMAW mode and use the mode that pro- duces the best welding results.

3.Air/Carbon Arc Cutting / Stick Welding / High Current, Large Puddle Submerged Arc Welding: Use the CC mode. When the Idealarc DC-400 is used for Air/Carbon Arc cutting, the OUTPUT CONTROL potentiometer should be set to “9” ini- tially. Based on the size of the carbon being used or the process, turn the potentiometer to a lower setting as required by the process. You can use carbon rods up to 5/16” (8 mm) in diameter at cur- rents as high as 450 amps with excellent arc con- trol. The welder protection circuit protects the machine from extremely high short circuiting pulses.

SEMIAUTOMATIC AND AUTOMATIC WIRE FEEDING WITH AN IDEALARC DC-400

When using the Idealarc DC-400 with semiautomatic or automatic wire feeding equipment and for stick welding or air/carbon arc cutting, it is recommended that the optional MULTIPROCESS switch be used. This switch permits you to easily change the polarity of the connected wire feeding equipment or switch to stick welding or air/carbon arc cutting.

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9.Set OUTPUT CONTROL potentiometer to desired voltage or current.

10.Make the weld.

IDEALARC DC-400

LINCOLN ®

ELECTRIC

Lincoln Electric SVM 122-A Welding Operation, Operating Steps, Local Control, Remote Control

Models: SVM 122-A