OPERATING STEPS
Before operating the machine, be sure you have all the materials needed to perform the work. Be sure you are familiar with and have taken all possible safety pre- cautions before starting the work. It is important that you follow these operating steps each time you use the machine.
RUN-IN MODE
The IDEALARC SP-250 can operate in either a slow or fast run-in mode. It is factory set to operate in the slow run-in mode. In the slow run-in mode, the SP-250 ini- tially feeds wire at the rate of 50 IPM until output cur- rent is reached or for 2 seconds, whichever condition is reached first. When either of these conditions are reached, the SP-250 accelerates to the preset wire feed speed.
When the SP-250 is in the fast run-in mode, the wire feed speed immediately accelerates to the preset wire feed speed - (available on later codes only.)
CHANGING RUN-IN MODE (CODES 10001 AND ABOVE)
NOTE: Arc starting characteristics may be affected when using the fast run-in mode because normal start- ing processes are overridden.
1.Turn the ON/OFF POWER SWITCH to ON.
2.Press and hold both the TIMERS OFF key and the PROCESS key.
NOTE: The order in which the TIMERS OFF key and the PROCESS key are pressed does not matter.
3.Read the SP-250 LED display. One of two mes- sages appear:
FAST INCH ENABLED = (Fast run-in mode) FAST INCH DISABLED = (Slow run-in mode)
NOTE: The run-in message appears on the display for 2 seconds. Pressing the PROCESS key causes the message to disappear immediately.
4.Select run-in mode required.
a.If run-in mode displayed is the required mode, continue with weld process.
b.If run-in mode displayed is not the required mode, repeat Step 1. By repeating Step 1, the run-in mode changes. Pressing the TIMERS OFF key and the PROCESS key allows you to switch back and forth between the two run-in modes.
You need only perform the above procedure when you want to change the run-in mode. It is not necessary to repeat the above procedure each time the unit is pow- ered up. The unit will remember the run-in mode from the previous power down and return you to that same state on your next power up. When saving to Memory locations 1-5, the run-in mode is saved at the same time. All operators should be aware that when recalling a procedure from a memory location, the run-in mode in memory overrides any present run-in mode setting. The run-in mode remains in effect until either the run- in mode is changed using the double keystroke or until a memorized procedure containing the opposite run-in mode is recalled.
MAKING A WELD IN AUTO MODE
1.Check that the polarity is correct for the process being used.
2.Turn the ON/OFF POWER SWITCH to ON.
3.Press (PROCESS) key.
4.Press LEFT UP or DOWN ARROW Keys to select wire type being used.
5.Press CENTER UP or DOWN ARROW Keys to select wire diameter being used.
6.Press RIGHT UP or DOWN ARROW Keys to select welding gas type being used.
7.Press AUTO key. When the AUTO key is pressed, an alarm will beep three times. The following mes- sage is displayed for 2.5 seconds: PROCESS MUST MATCH WIRE & GAS.
8.Press UP or DOWN ARROW Keys to select metal thickness.
9.If SPOT or STITCH timing modes NOT required, go to Step 12.
