Lincoln Electric 200 Control of Welding Current Idler Operation, TBI Deicing System, BBB-4

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BBB-4		OPERATION									BBB-4
CONTROL OF WELDING CURRENT				IDLER OPERATION
			The operating speeds are as follows:
	CAUTION
				ORDERING		ENGINE	FULL		HIGH		LOW
DO NOT TURN THE “CURRENT RANGE SELEC-
					INFO.		LOAD		IDLE		IDLE
TOR” WHILE WELDING because the current may
				K6090-7		GM 3.0L	1600-		1600-		1360
arc between the contacts and damage the switch.
------------------------------------------------------------------------							1500		1500
The “Current Range Selector” provides five overlap-
ping current ranges. The “Fine Current Adjustment”
adjusts the current from minimum to maximum within			The idler is controlled by the “Idler” toggle switch on the
each range. Open circuit voltage is also controlled by
the “Fine Current Adjustment” permitting control of the			welder control panel. The switch has two positions as
arc characteristics.			follows:				position, the idler is off, and the
A high open circuit voltage setting provides the soft			1.		In the “High”
“buttering” arc with the best resistance to pop-outs pre-					engine runs at the high speed controlled by the gov-
ferred for most welding. To get this characteristic, set					ernor. This speed can be adjusted between 1500
the “Current Range Selector” to the lowest setting that					and 1600 RPM using the RPM dial on the output
still provides the current you need and set the “Fine					rail.
Current Adjustment” near maximum. For example: to obtain			2.		In the “Automatic”			/		position, the
175 amps and a soft arc, set the “Current Range Selector” to
the 190-120 position and then adjust the “Fine Current					idler operates as follows:
Adjustment” for 175 amps.					• When welding or drawing power for lights or tools
When a forceful “digging” arc is required, usually for
vertical and overhead welding, use a higher “Current					(approximately 100-150 watts minimum) from the
Range Selector” setting and lower open circuit voltage.					receptacle, the engine operates at the speed, set
For example: to obtain 175 amps and a forceful arc, set					by the RPM dial.
the “Current Range Selector” to the 240-160 position					• When welding ceases or the power load is turned
and the “Fine Current Adjustment” setting to get 175
amps.					off, a preset time delay of 10 seconds starts. This
	CAUTION				time delay cannot be adjusted.
					• If the welding or power load is not re-started
DO NOT attempt to set the “Current Range Selector”					before the end of the time delay, the idler reduces
between the five points designated on the nameplate.					the engine to low idle speed.
------------------------------------------------------------------------			AUXILIARY POWER
These switches have a spring loaded cam which
almost eliminates the possibility of setting this switch			1.75 kw of 120V DC auxiliary power is available at the
between the designated points.
TBI DEICING SYSTEM			receptacle located on the control panel.

The welder has been designed to allow continuous year-round operation. Engine coolant is channeled through the TBI housing to prevent the build up of ice on the TBI throat around the throttle plate. the elec- tronic controller is programmed to automatically com- pensate for the build up of ice on the throttle plate. There will be no noticeable change in the operation of the welder should icing develop. On start-up, there is a possibility for the engine to overspeed (to a maximum of 2000 RPM) for up to 10 seconds after throttle body icing conditions have occurred. The electronic gover- nor will correct itself for the new operating conditions and normal operation will resume.

PIPELINER® 200G