Hobart Welding Products 350LX manual Start/Crater Sequence Controls

4-18. Start/Crater Sequence Controls

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	1	Sequence Selection Switch
(CE Nameplate Only)	Place switch in Start/Crater posi-
	tion.
	2	Start Time/Spot Time
	1	Control
	Use control to select 0–15 sec-
	onds of start time.
	3	Start Current Control
	Use start control to select a start-
	ing current (3–400 amps) that is
	different from the weld current.
	4	Crater Time Control
	Use control to reduce current
	over a set period of time (0–15
	seconds) at the end of the weld
	cycle when NOT using a remote
	current control.
	5	Final Current Control
2	Final current is the current to
	which weld current has sloped
	down to (0–100% of current set
	on Amperage Adjust control).
	Application:
	Start current can be used while
	GTAW welding to assist in pre-
	heating a cold material prior to
	depositing filler material. Start
	current can also be used for
	SMAW to ensure a more consis-
	tent arc strike.
	Crater Time can be used while
	GTAW welding when material be-
	ing welded is crack sensitive, and
3	the operator is using an on/off
	type control to start and stop the
	welding process.
	NOTE: Use this method when
	the function of a remote control is
	desired, but only a remote on/off
	control is available.

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OM-356 Page 31