Welding Operation; Operating Steps; Local Control; Remote Control - Lincoln Electric IDEALARC R3R-300 Service Manual

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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.
OPERATION

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.
IDEALARC R3R
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