Lincoln Electric R3R-300, R3R-500 Controls and Settings, Figure B.1 Case Front Controls

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B-4 B-4

OPERATION

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

9

8
	10
7
6	11
5
4	1
	3
	2

1.	Power Source Pilot Light	7.	Remote Control Connections (6-pin amphenol or terminal strip)
2.	ON/OFF Power Toggle Switch	8.	Polarity Switch (optional)
3.	Arc Force Control	9.	DC Ammeter (optional)
4.	Current Range Selector Switch (not on R3R-300)	10.	DC Voltmeter (optional)
5.	Output Control Potentiometer	11.	Thermal Protection Indicator Light
6.	Output Control Switch (with R3R or Remote positions)

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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.

IDEALARC R3R