Lincoln Electric SP-255 manual 4OPERATION, Procedure Keys, Typical Auto KEY Press Sequences

B-4OPERATION

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		Welding Gas
Solid Steel	.025 (0.6mm)	CO2
Solid Steel		.025 (0.6mm)		ArCO2
Solid Steel		.030 (0.8mm)		CO2
Solid Steel		.030 (0.8mm)		ArCO2
Solid Steel		.035 (0.9mm)		CO2
Solid Steel		.035 (0.9mm)		ArCO2
Solid Steel		.035 (0.9mm)		ArO2
Solid Steel		.045 (1.2mm)		CO2
Solid Steel		.045 (1.2mm)		ArCO2
Stainless		.035 (0.9mm)		ArO2
Stainless		.035 (0.9mm)		HeArCO2
Aluminum (5356)		3/64” (1.2mm)		Argon
Outershield®		.045 (1.2mm)		CO2
Outershield		.045 (1.2mm)		Ar/CO2
Innershield®		.035 (0.9mm)		None
Innershield		.045 (1.2mm)		None

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

available sizes. (NOTE: If the spot or stitch timers are 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 decreases (down arrow) wire feed speed setting. Increasing or decreasing wire feed speed will simultaneously cause an increase or decrease in the arc voltage and can change the metal thick- ness setting.

Right arrow keys — Increases (up arrow) or decreases (down arrow) arc voltage setting. An up arrow indicator appears below the V in VOLTS if the arc voltage has been set higher than the rec- ommended value, and a down arrow indicator appears below the V in VOLTS if the arc voltage is below the recommended value. No arrow indicates that you are set to the recommended value. (See 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.)

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

Figure 4 Figure 5

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.