Lincoln Electric SP-250 service manual Operational, Controls, Recommended Processes, Equipment

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B-2	OPERATION			B-2
The system includes the following features:		OPERATIONAL	FEATURES	AND
• 2-step or 4-step selectable trigger function (above		CONTROLS
code 9500 only).		Keypad - Consists of 20 membrane keys that have
• both timed spot and stitch welding selections.		large touch areas. The keys are spaced far enough
		apart to provide easy selection, even if wearing weld-
• drop-in 2" (51mm) O.D. wire reel spindle with a 22-		ing gloves. An audible	feedback beep is	provided
30 lb. (10 - 13.6 kg) Readi-Reel- adapter.		whenever a key is pressed to ensure proper entry.
• integral gas cylinder mounting undercarriage.		Display - Wide temperature range liquid crystal display
		combines large 0.32" (8.1mm) high characters in a 2-
• 12.5 ft. (3.8m) Magnum 250SP GMAW gun and		line by 16-character alphanumeric format. It has long
cable.		life LED backlighting and a non-glare cover for easy
		viewing under bright or dark conditions. Multi lan-
• dual groove drive roll and a gun liner for .035		guage display capability permits the SP-250 to com-
(0.9mm) and .045 (1.2mm) electrodes.		municate in English, German, French, Spanish, or
		Japanese (Katakana).
• one contact tip for each wire size.		Auto Mode - Simply set the thickness of the material
• adjustable CO2 or argon blend flow regulator with		being welded and the SP-250 automatically sets the
cylinder pressure gauge.		proper wire feed speed and arc voltage for the process
		being used. This eliminates the need for look-up
• 10 ft. (3.0m) plug cable with receptacle.		tables, procedure slide rules, or notebooks to find the
		proper settings. Auto Mode also provides one key con-
• 12 ft. (3.6m) work cable with clamp.		trol of the output by automatically adjusting both the
		wire feed speed and arc voltage for an increase or
RECOMMENDED PROCESSES AND		decrease in material thickness or wire feed speed.
		This allows the operator to easily increase or decrease
EQUIPMENT		his output without having to know how much to change
		each parameter.
The SP-250 is recommended for GMA welding		Thumb Switch on Gun - Allows the operator to set or
processes using 10 to 30 lb. (4.5 to 13.6 kg) 2" (51mm)
		change the output of the machine, the wire feed speed,
I.D. spools or Readi-Reel coils of
		or the arc voltage from the gun, even during welding.
• .025" through .045" (0.61.2mm) solid steel using		This permits "on the fly" adjustment. In toggle opera-
		tion mode, the thumb switch allows the operator to
CO2, ArCO2, or ArO2 shielding gas
		toggle between two procedures stored in memory.
• .035" (0.9mm) stainless steel using ArO2 or		Memory - There are five separate memory locations
HeArCO2 shielding gas		that the operator can use to save or recall a setup pro-
		cedure. This eliminates dial marking and makes recall-
• 3/64" (1.2mm) aluminum using Ar shielding gas		ing a setup as simple as pushing one of the five mem-
		ory keys for instant recall. Also, when power is
• .045" (1.2mm) Outershield- electrodes using CO2		removed, these five memories as well as any current
or ArCO2 shielding gas		setup in use is automatically saved. This feature does
		not require batteries. When power is restored, the pro-
• .035" (0.9mm) and .045 (1.2mm) Innershield self-		cedure in use will automatically return the unit to what-
		ever was set up was being used when power was
shielded electrodes.
		removed.
The SP-250 is factory equipped to feed .035 (0.9mm)		Trigger Interlock (Above code 9500 only) - Selectable
and .045 (1.2mm) electrodes and includes a 200A,
		four-step trigger interlock	allows operator to release
60% duty cycle rated, 12.5 ft. (3.8m) GMA gun and
		gun trigger after weld current is established and con-
cable assembly equipped for these wire sizes. The
		tinue welding. Breaking the arc or re-closing and then
SP-250 is factory equipped with an adjustable CO2 or
		releasing the gun trigger, stops the welding process.

argon blend flow regulator. A supply of shielding gas is required for GMAW processes.

IDEALARC SP-250