Hobart Welding Products 350LX manual High Frequency Control, Optional Sequence Controls

4-13. High Frequency Control

1

YDo not use high frequency while Shielded Metal Arc Weld- ing (SMAW).

1 High Frequency Control

For GTAW, use control to set HF intensity. Set as low as possible.

Application:

If HF is present at the tungsten, the control is set high enough.

Arc rectification can occur when welding above 200 amps and/or while welding with helium gas. If this condition occurs, increasing the HF Intensity control towards maximum, may help to restabilize the arc.

.As high frequency intensity is increased, the possibility of inter- fering with local electronic devices, especially communication equipment, also increases. Set control as low as possible to avoid such interference.

Ref. ST-801 972

4-14. Optional Sequence Controls

			1	Sequence Selection Switch
			See Section 4-15.
			2 Start Time/Spot Time Control
	1		See Section 4-16.
2		4	3	Start Current Control
			See Section 4-16.
			4	Crater Time Control
			See Section 4-17.
			5	Final Current Control
			See Section 4-17.
3		5
	(CE Nameplate Only)
2		4
3		5
	1			Ref. ST-191 372
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