Hobart Welding Products 350LX manual Start Mode, Application

4-6. Start Mode

(CE Nameplate Only)

1 1

2 3

Lift-ArctStart Method

1 – 2

“Touch” Seconds

1 Start Mode

For SMAW welding, press button to toggle LED to Off position.

For GTAW welding, use control to select Off for no HF, Lift-Arct, HF for arc starting only, or continuous HF. See Section 4-13 for ad- justing high frequency intensity.

Application:

When Off is selected, use the scratch meth- od to start an arc for both the SMAW and GTAW processes.

When Lift-Arc is selected, start arc as follows:

2TIG Electrode

3Workpiece

Touch tungsten electrode to workpiece at weld start point, enable output with torch trigger, foot control, or hand control. Hold electrode to workpiece for 1-2 seconds,

Do NOT Strike Like A Match!

and slowly lift electrode. An arc will form when electrode is lifted.

Shielding gas begins to flow when elec- trode touches work piece.

Normal open-circuit voltage is not present before tungsten electrode touches work- piece; only a low sensing voltage is present between electrode and workpiece. The sol- id state output contactor does not energize until after electrode is touching workpiece. This allows electrode to touch workpiece without overheating, sticking, or getting contaminated.

Application:

Lift-Arc is used for the DCEN GTAW pro- cess when HF Start method is not per- mitted.

When HF Start is selected, start arc as follows:

High frequency turns on to help start arc when output is enabled. High frequency

turns off when arc is started, and turns on whenever arc is broken to help restart arc.

Application:

HF Start is used when the DCEN GTAW process is required.

When HF Continuous is selected, start arc as follows:

High frequency turns on when output is en- ergized and remains on for duration of weld.

Application:

HF Continuous is used when the AC GTAW process is required.

NOTE: Lit LED indicates selected mode.

When Output Selector switch position changes, LED may change position, based upon last selection.

NOTE: Some start methods may not be available for all processes.

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