Lincoln Electric SVM145-B service manual Operation

When the triggering device is pressed the contac- tor is closed and the welding terminals are “Hot.”

When the triggering device is released the con- tactor is opened and the welding terminals are “Cold.”

12. LOCAL/REMOTE SWITCH: The toggle switch on the control panel labeled “LOCAL/REMOTE” gives the operator the option of controlling the output at the welder control panel or at a remote station. For remote control, the toggle switch is set in the “REMOTE” position. For control at the welder control panel, the toggle switch is set in the “LOCAL” position.

13. 6 - PIN CONNECTOR: The 6-pin connector locat- ed on the control panel allows for connection of interfacing equipment.

14. WELD OUTPUT TERMINALS + AND – :These 1/2 - 13 studs with flange nuts provide welding connection points for the electrode and work cables. For positive polarity welding, the electrode cable connects to the “+” terminal and the work cable connects to this “-” terminal. For negative polarity welding, the work cable connects to the “+” terminal and the electrode cable connects to this “-” terminal.

With the switch in the “WELDING TERMINALS REMOTELY CONTROLLED” position, the contac- tor operation is controlled by an Amptrol, Arc Start Switch or some other type of triggering device through the use of a control cable connected to the 6-pin or 14-pin MS connector.

With the switch in the “WELDING TERMINALS ALWAYS ON” position, the contactor is closed and the welding terminals are always “Hot.”

AUXILIARY POWER CONTROLS (Items 15 through 19)

15. 120/240VAC RECEPTACLE: This is a 120/240VAC (14-50R) receptacle that provides 240VAC or can be split for 120VAC single-phase auxiliary power. This receptacle has a 50-amp rat- ing. Refer to AUXILIARY POWER RECEPTA- CLES in the Installation section for further informa- tion about this receptacle. Also refer to AUXIL- IARY POWER OPERATION later in this section.

16. 50 AMP CIRCUIT BREAKERS: These circuit breakers provide separate overload current protec- tion for each 120V circuit at the 240V receptacle.

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B-7 B-7

OPERATION

10. DIGITAL OUTPUT METER: The digital output meters are located in the center of the control panel between the two large control knobs. The meters allow the output current level to be set prior to welding in stick mode and voltage level to be set prior to welding in the wire modes. During the welding process the meters display the actual output current and voltage, within +1%, -10% accuracy.

11. WELDING TERMINALS SWITCH: The toggle switch on the control panel labeled “WELDING TERMINALS ALWAYS ON” and “WELDING TER- MINALS REMOTELY CONTROLLED” is used to control the operation of the “solid state contactor”

which allows for the selection of “Hot” or “Cold” 17. 120VAC RECEPTACLES: These two 120VAC (5-

welding terminals.15R) receptacles with GFCI protection provide 120VAC for auxiliary power. These receptacles have a 20 amp total rating. Refer to AUXILIARY POWER RECEPTACLES in the Installation section for further information about these receptacles. Also refer to AUXILIARY POWER OPERATION later in this section.

18. 15 AMP CIRCUIT BREAKERS: These circuit breakers provide separate overload current protec- tion for each 120VAC receptacle.

19. GROUND STUD: Provides a connection point for connecting the machine case to earth ground for the safest grounding procedure. Refer to MACHINE GROUNDING in the Installation section for proper machine grounding information.

20. 15 AMP CIRCUIT BREAKER: This circuit breaker provides overload protection for the 120 VAC cir- cuit in the 14-pin connector.

21. VOLTMETER +/- SWITCH: Changes the polarity display on the wire feeder.

22. 15 AMP CIRCUIT BREAKER: This circuit breaker provides overload protection for the 42 VAC circuit in the 14-pin connector.

23. 14-PIN CONNECTOR: For quick connection of interfacing equipment.

24. ARC CONTROL: The “ARC CONTROL” poten- tiometer is active in two modes: “STICK/TIG” and “WIRE WELDING” with different purposes in each mode.

“STICK/TIG” mode: In this mode, the “ARC CON- TROL” knob sets the short circuit current during stick welding. Increasing the number from 1 to 10 increas- es the short circuit current. This prevents sticking of the electrode to the plate at low welding current set- tings. This also increases spatter. It is recommended that the control be set to the minimum number without electrode sticking.

COMMANDER 300