Lincoln Electric SVM188-A service manual General Description, Recommended Processes and Equipment

B-3 OPERATION B-3

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GENERAL DESCRIPTION

The DC-600 is an SCR controlled three phase welding and cutting power source. It uses a single range poten- tiometer to control:

•Submerged Arc Semi-Automatic or Automatic Welding

•Open Arc Semi-Automatic or Automatic Welding

•Stick Welding

•Air/Carbon Arc Cutting (Carbon Rod Sizes up to 3/8” Diameter)

The DC-600 has a three-position Welding Mode Switch to enable the user to operate in one of three modes:

•Constant Current (CC) Stick (also used for AAC)

•Constant Voltage (CV) Submerged Arc

•Constant Voltage (CV) Innershield (also used for FCAW/GMAW)

Three models are available:

•Domestic - all 60 Hertz models except 230/460/575V.

•Canadian-230/460/575V 60 Hertz models

•Export-50/60 Hertz models

The optional Multi-Process Switch allows the user to switch between semi-automatic or automatic welding and stick welding or air/carbon arc cutting without dis- connecting the wire feeder equipment control, elec- trode,and work leads.

RECOMMENDED PROCESSES AND EQUIPMENT

The DC-600 is designed for GMAW (MIG), FCAW, and submerged arc (SAW) within the capacity of the machine. It can also be used for stick welding (SMAW) and for air carbon arc (AAC) cutting with carbon rods up to 3/8" diameter.

The DC-600 is provided with a three position mode switch that selects CV Innershield, CV Submerged Arc, or CC Stick.

The DC-600 can be easily connected to wire feeding equipment, including:

•Semi-automatic wire feeders LN-7, LN-7 GMA, LN- 742, LN-8, LN-9, LN-9 GMA, LN- 10, LN-15 LN- 23P, LN-25, and DH-10.

•Automatic wire feeders NA-3, NA-5, and NA-5R.

•Tractors LT-56 and LT-7

DESIGN FEATURES AND

ADVANTAGES

•Excellent arc characteristics for optimum constant voltage submerged arc and Innershield welding performance.

•A control circuit designed to provide good starting for a large variety of processes and procedures.

•Output Control Potentiometer that provides easy single range continuous control.

•Output Control Switch that provides simple switch- ing from local to remote control.

•Output Terminals Switch to energize output termi- nals either local or remote.

•White neon pilot light to confirm that the Input Contactor is energized.

•DC Ammeter and Voltmeter

•42VAC 10 Amp auxiliary power available for the wire feeder, circuit breaker protected.

•Single MS-type (14 pin) connector for wire feeder.

•115VAC 15 Amp auxiliary power available for the wire feeder, circuit breaker protected.

•115VAC 15 Amp duplex plug receptacle available on 60 Hertz models, circuit breaker protected.

•Multi-functional terminal strip for easy connection of wire feeding control cables.

•Recessed output terminals to avoid any person or object from accidentally coming into contact with the output terminals and labeled " + " and " - " for easy identification.

•Thermostatically protected power source.

•Electronic protection circuit to protect power source against overloads.

•Input line voltage compensation to provide an essentially constant output.

•SCR electronically controlled welder output pro- vides extra long life, especially for highly repetitive welding applications.

•Solid state 2 and 4 circuit for extra long life.

•Two circuit solid state control system provides maximum performance and circuit protection.

•Low profile case provides maximum use of space.

•Convenient access to all controls.

•Output lead strain relief loops to prevent terminal and cable damage.

•Easily removed case side, even when stacked.

•Outdoor operation because enclosure is designed with air intake louvers that keep dripping water from entering the unit. Transformer, SCR bridge, and choke have special corrosion resistant paint for added protection.

DC-600