Lincoln Electric SVM208-A service manual Welding Operation, Control Function / Operation

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B-8		OPERATION		B-8
WELDING OPERATION			7. Strike an arc and begin welding. For information
			on welding techniques, see WELDING GUIDE-
			LINES in this section of the manual.
	WARNING
			AFTER YOU FINISH THE WELD:
	GENERAL INFORMATION
			1. Stop the gasoline engine. See ENGINE OPERA-
	ELECTRIC SHOCK can kill.		TION in this section of the manual.

•Do not touch electrically live parts or 2. Allow the electrode and work to cool completely. electrodes with your skin or wet cloth-

3.Remove the work clamp from the work.

ing.
• Insulate yourself from the work and ground.	4. Remove any remaining piece of electrode from the
	electrode holder.
• Always wear dry insulating gloves.	5. If you are finished using the Bulldog® 140 for weld-
------------------------------------------------------------------------	ing, disconnect the welding cables from the weld
The Bulldog® 140 has a voltage of up to 66 Volts AC	output terminals.	Reattach the flange nuts and
	leave them on the terminals.
which can shock. The Bulldog® 140 generator/welder
can deliver from 70 to 125 amps of continuous welding	NOTE: 1. Welding current is continuously variable
output current. Output can be adjusted by setting the
	with 60% duty cycle applying to output
current control dial on the output control panel.
	currents 100 Amps and less and 30%
You can get maximum welding output by setting the	duty cycle applying to currents above 100
dial to 125 AMPS. At high current settings like this,	Amps.
some output may decrease as the machine is used. If	2. Duty cycle is based on a ten minute peri-
you are welding for a long time, you may need to turn
	od. The welder can be loaded to 125
the dial slightly upward to maintain the same results.
	Amps for three minutes out of every ten
The numbers on the dial correspond to the average	minute period or to 100 Amps for six min-
amps needed to weld using specific Lincoln welding	utes out of every ten minute period.
rods. Table B.2, WELDING APPLICATIONS, gives
you the recommended dial settings based on the thick-	CONTROL FUNCTION / OPERATION
ness of the work and the size and type of rod you’re
	“Current Control Dial”
using.
	Provides welding current adjustment from 70 through
	125 Amps.
TO USE THE Bulldog® 140 FOR WELDING:	To obtain maximum weld output, turn the “Current
1. Remove the flange nuts from the weld output ter-	Control Dial” to “125 Amps” for either a cold or hot
minals and place the work and electrode welding	engine. As the machine is used, some welding voltage
cables over the terminals. (See Figure B.1)	may decrease at high current settings. If you are weld-
Replace and tighten the flange nuts securely. Be	ing for long periods of time, the dial may need to be
sure the connections are tight.	slightly turned upward to provide the same welding
2. Select the appropriate electrode. (See Table B.2)	results as when the machine was cold.
WELDING APPLICATIONS, or the ELECTRODE	The numbers listed on the dial correspond to the aver-
SELECTION GUIDE on the machine Output	age amperage needed to weld specific Lincoln rods.
Control Panel.	Refer to Table B.2 “Welding Application Guide” and
3. Attach the work clamp securely to the work you are	“Electrode Selection	Guide” listed on the machine

	welding.	nameplate for proper current and electrode settings.
4.	Insert the electrode into the electrode holder.
5.	Set the current control dial to the desired output
	current.
6.	Start the gasoline engine. See ENGINE OPERA-
	TION in this section of the manual.

BULLDOG® 140