Lincoln Electric IDEALARC SP-255 Operator's Manual page 16

B-4
Center arrow keys—set Wire Diameter
Right arrow keys—set Welding Gas
The following 16 processes are programmed into the
SP-255:
Wire Type Wire Diameter
Solid Steel .025 (0.6mm)
Solid Steel .025 (0.6mm)
Solid Steel .030 (0.8mm)
Solid Steel .030 (0.8mm)
Solid Steel .035 (0.9mm)
Solid Steel .035 (0.9mm)
Solid Steel .035 (0.9mm)
Solid Steel .045 (1.2mm)
Solid Steel .045 (1.2mm)
Stainless .035 (0.9mm)
Stainless .035 (0.9mm)
Aluminum (5356) 3/64" (1.2mm)
®
Outershield .045 (1.2mm)
Outershield .045 (1.2mm)
®
Innershield .035 (0.9mm)
Innershield .045 (1.2mm)
PROCEDURE KEYS
Because design, fabrication, assembly and
welding variables affect the results obtained in
applying recommended procedure information,
the serviceability of a product or assembly is
the responsibility of the builder/user.
AUTO KEY
Pressing the Auto Key once places the SP-255 into
the automatic mode of operation. Auto mode provides
automatic setup of the recommended wire feed speed
and arc voltage based on the metal thickness selected
and the process being used. The Auto mode screen
displays metal thickness, set wire feed speed, the set
arc voltage, and a cursor that indicates which parame-
ter, wire feed speed, or arc voltage is being controlled
by the thumbswitch on the SP-255 gun (see Gun
Switches section).
Left arrow keys — Increases (up arrow) or
decreases (down arrow) metal thickness setting.
Increasing or decreasing metal thickness automati-
cally increases or decreases both wire feed speed
and arc voltage simultaneously. See gauge chart
on instruction label on inside of SP-255 door for
IDEALARC SP-255
OPERATION
available sizes.
on, metal thickness is not displayed and, therefore,
the left arrow keys will not function. Also, the left arrow
keys do not function when the trigger is closed. (See
Figures I and 2 following.)
Center arrow keys — Increases (up arrow) or
Welding Gas
decreases (down arrow) wire feed speed setting.
Increasing or decreasing wire feed speed will
CO
2
ArCO
simultaneously cause an increase or decrease in
2
CO
2
the arc voltage and can change the metal thick-
ArCO
2
ness setting.
CO
2
ArCO
2
ArO
2
Right arrow keys — Increases (up arrow) or
CO
2
decreases (down arrow) arc voltage setting. An up
ArCO
2
arrow indicator appears below the V in VOLTS if
ArO
2
HeArCO
the arc voltage has been set higher than the rec-
2
ommended value, and a down arrow indicator
Argon
appears below the V in VOLTS if the arc voltage is
CO
2
Ar/CO
below the recommended value. No arrow indicates
2
that you are set to the recommended value. (See
None
None
Figures 4 and 5 following.)
Repressing the Auto key resets the wire feed speed
and arc voltage settings to the recommended values
for the metal thickness displayed. (NOTE: If the spot
or stitch timers are on, metal thickness is not dis-
played and, therefore, the repress function does not
work.)
TYPICAL AUTO KEY PRESS SEQUENCES
Process screen is being displayed prior to pressing
Auto key. The Auto key is pressed, the Auto screen is
now displayed.
If the unit was in a Manual configuration (see Manual
Key) when the Auto key was pressed, the audio alarm
will beep three times and a message (see below) will
be displayed for 2.5 seconds reminding you that the
process entered into the SP-255 (see Process Key)
must match the wire and gas being used. After the 2.5
second period is over, the Auto screen will be dis-
played with the same procedure that was in Manual.
(NOTE: If the spot or stitch timers are
Figure 4 Figure 5