Welding Operation, Operating Steps | Lincoln Electric R3R-300

B-6

OPERATION

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WELDING OPERATION

OPERATING STEPS

LOCAL CONTROL

The following procedures are for using the Idealarc R3R in the local (“R3R”) control mode of operation. For remote control of the machine, see the REMOTE CONTROL section.

Before operating the machine, make sure you have all materials needed to complete the job. Be sure you are familiar with and have taken all possible safety pre- cautions before starting work. It is important that you follow these operating steps each time you use the machine.

1.Turn on the main AC input power to the machine.

2.Set the ELECTRODE POLARITY switch to the appropriate position (optional if equipped).

3.Set the OUTPUT CONTROL switch to “R3R.”

4.Set the ARC FORCE CONTROL to midrange, 5-6, for CC stick or TIG welding. Adjust for best char- acteristics as necessary.

5.Set the ON/OFF POWER toggle switch to the ON position (1).

•The white power source pilot light glows.

•The fan starts.

6.Set the CURRENT RANGE SELECTOR switch to the appropriate position (“A” for higher range, “B” for lower range).

7.Set OUTPUT CONTROL potentiometer to desired current.

8.Make the weld.

REMOTE CONTROL

The toggle switch on the control panel labeled “Output Control Remote” gives you the option of controlling the machine output from a remote location. In the “Remote” position a remote control device such as a K857 must be connected to the Idealarc R3R. Refer to the Accessories section for available remote control information.

POCKET AMPTROL (Optional)

The pocket amptrol option provides a remote current control for the R3R welders. This “wireless” control requires no control cable connection to the welder. Use it as follows:

a.On the R3R-400 and -500 the welder CURRENT CONTROL switch must be in the “Remote” posi- tion and the CURRENT RANGE SELECTOR switch in the “B” range. The R3R-300 does not have a CURRENT RANGE SELECTOR switch. With the CURRENT CONTROL switch in the “Remote” posi- tion, the OUTPUT CONTROL potentiometer on the welder is removed from the circuit and its setting has no effect on the ouput. With the CURRENT RANGE SELECTOR switch in the “B” range posi- tion, the pocket amptrol provides total control from minimum to maximum output of the welder.

b.Turn the welder POWER switch ON.

c.Insert one end of the probe into the electrode hold- er and hold the other end on the work for approxi- mately five seconds.

d.To change current, change the probe dial setting and repeat the five second procedure of placing the probe between electrode and work.

The solid state circuitry within the welder senses this change in probe setting and automatically resets the welding current to the new level. Each time the welder is turned off, the output goes to minimum and must be reset when the welder is turned on again.