CONTROLS AND SETTINGS
All operator controls and settings are located on the
case front assembly. See Figure B.1 for their loca-
tions.
FIGURE B.1 – CASE FRONT CONTROLS
1.
POWER SOURCE PILOT LIGHT
: This light indi-
cates that input power is applied to the R3R and
that the on/off switch is in the ON position.
2.
ON/OFF POWER TOGGLE SWITCH:
Energizes
or de-engergizes the input contactor which is pow-
ered by the 115 volt auxiliary transformer. The
switch turns the machine ON or OFF. Position “I”
is ON; position “0” is OFF.
3.
ARC FORCE SELECTOR:
Allows you to select
the ideal arc force according to the procedure and
electrode being used for CC stick. It controls the
amount of current added to the welding current
when the electrode shorts to the work. At mini-
mum setting, no extra short circuit current is
added. The arc will be softer and have less spat-
ter but may be more prone to sticking. At maxi-
mum setting, the arc will be more forceful and less
prone to sticking but will produce more spatter.
For TIG welding applications, this control should
usually be set to minimum.
4.
CURRENT RANGE SELECTOR SWITCH (R3R-
400 and R3R-500 only):
“A” position selects
lower range current control. “B” position selects
higher range current control.
5.
OUTPUT CONTROL SWITCH (R3R OR REMOTE
POSITIONS):
Selects the mode of control. In the
“R3R” position, control is by the machine control
panel. In the “Remote” position, control is through
an optional remote control device.
6.
OUTPUT CONTROL POTENTIOMETER:
Con-
trols current.
7.
REMOTE CONTROL CONNECTION:
The 6-pin
amphenol receptacle provides remote control con-
nections. Machines below code 9500 use a termi-
nal strip instead of the amphenol. A strain relief
connector is provided for cable entry.
OPERATION
B-4
B-4
IDEALARC R3R
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1. Power Source Pilot Light
2. ON/OFF Power Toggle Switch
3. Arc Force Control
4. Current Range Selector Switch (not on R3R-300)
5. Output Control Potentiometer
6. Output Control Switch (with R3R or Remote positions)
7. Remote Control Connections (6-pin amphenol or terminal strip)
8. Polarity Switch (optional)
9. DC Ammeter (optional)
10. DC Voltmeter (optional)
11. Thermal Protection Indicator Light
