Recommended Processes And Equipment; Operational Features And Controls - Lincoln Electric IDEALARC SP-255 Service Manual

B-2
RECOMMENDED PROCESSES AND
EQUIPMENT
The SP-255 is recommended for GMA welding
processes using 10 to 44 lb. (4.5 to 20 kg) 2" (51mm)
I.D. spools or Readi-Reel coils of
• .025" through .045" (0.6 - 1.2mm) solid steel using
CO 2 , ArCO 2 , or ArO 2 shielding gas
• .035" (0.9mm) stainless steel using ArO 2 or
HeArCO 2 shielding gas
• 3/64" (1.2mm) aluminum using Ar shielding gas
• .045" (1.2mm) Outershield- electrodes using CO 2
or ArCO 2 shielding gas
• .035" (0.9mm) and .045 (1.2mm) Innershield self-
shielded electrodes.
The SP-255 is factory equipped to feed .035 (0.9mm)
and .045 (1.2mm) electrodes and includes a 200A, 60%
duty cycle rated, 12.5 ft. (3.8m) GMA gun and cable as-
sembly equipped for these wire sizes. The SP-255 is
factory equipped with an adjustable CO
flow regulator. A supply of shielding gas is required for
GMAW processes.
OPERATIONAL
CONTROLS
Keypad - Consists of 20 membrane keys that have
large touch areas. The keys are spaced far enough
apart to provide easy selection, even if wearing welding
gloves. An audible feedback beep is provided when-
ever a key is pressed to ensure proper entry.
Display - Wide temperature range liquid crystal display
combines large 0.32" (8.1mm) high characters in a 2-
line by 16-character alphanumeric format. It has long
life LED backlighting and a non-glare cover for easy
viewing under bright or dark conditions. Multi language
display capability permits the SP-255 to communicate
in English, German, French, Spanish, or Japanese
(Katakana).
OPERATION
or argon blend
2
FEATURES AND
IDEALARC
Auto Mode - Simply set the thickness of the material
being welded and the SP-255 automatically sets the
proper wire feed speed and arc voltage for the process
being used. This eliminates the need for look-up tables,
procedure slide rules, or notebooks to find the proper
settings. Auto Mode also provides one key control of
the output by automatically adjusting both the wire feed
speed and arc voltage for an increase or decrease in
material thickness or wire feed speed. This allows the
operator to easily increase or decrease his output with-
out having to know how much to change each parame-
ter.
Thumb Switch on Gun - Allows the operator to set or
change the output of the machine, the wire feed speed,
or the arc voltage from the gun, even during welding.
This permits "on the fly" adjustment. In toggle opera-
tion mode, the thumb switch allows the operator to tog-
gle between two procedures stored in memory.
Memory - There are five separate memory locations
that the operator can use to save or recall a setup pro-
cedure. This eliminates dial marking and makes recall-
ing a setup as simple as pushing one of the five memory
keys for instant recall. Also, when power is removed,
these five memories as well as any current setup in use
is automatically saved. This feature does not require
batteries. When power is restored, the procedure in use
will automatically return the unit to whatever was set up
was being used when power was removed.
Trigger Interlock - Selectable four-step trigger interlock
allows operator to release gun trigger after weld current
is established and continue welding. Breaking the arc
or re-closing and then releasing the gun trigger, stops
the welding process.
SP-255
®
B-2