Lincoln Electric IM742-A Welding Controls Output Control, Digital Output Meters, ARC Control

B-2 OPERATION B-2

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WELDING CONTROLS

1. OUTPUT CONTROL:

The CONTROL dial provides continuous control of the welding current or welding voltage depending on the selected welding mode. This control is not active in the CC-STICK, PIPE, and CV-WIRE modes when a remote control or wire feeder with remote control is connected to either the 6 pin or 14 pin Amphenol.

2. DIGITAL OUTPUT METERS

The digital meters allow the output voltage (CV-WIRE mode) or current (CC-STICK, PIPE and TIG modes) to be set prior to welding using the OUTPUT control dial. During welding, the meter display the actual output volt- age (VOLTS) and current (AMPS). A memory feature holds the display of both meters on for seven seconds after welding is stopped. This allows the operator to read the actual current and voltage just prior to when welding was ceased. While the display is being held the left-most decimal point in each display will be flashing. The accuracy of the meters is +/- 3%.

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3. WELD MODE SELECTOR SWITCH:

(Provides four selectable welding modes)

CV-WIRE PIPE CC-STICK TOUCH START TIG

4. ARC CONTROL :

The ARC CONTROL WIRE/STICK dial is active in the WIRE, STICK and PIPE modes, and has different functions in these modes. This control is not active in the TIG mode.

CC-STICK, PIPE modes In these modes, the ARC CONTROL knob sets the short circuit current during stick welding (arc- force). Increasing the number from -10 to +10 increases the short circuit current and prevents sticking of the electrode to the plate while welding. This can also increase spatter. It is recom- mended that the ARC CONTROL be set to the minimum num- ber without electrode sticking. Start with a setting at 0.

CV-WIRE mode: In this mode, turning the ARC CONTROL clock wise from –10 (soft) to +10 (crisp) changes the arc from soft and washed-in to crisp and narrow. It acts as an induc- tance control. The proper setting depends on the proce- dure and operator preference. Start with a setting of 0.

RANGER 305G