Starting the Machine, Auxiliary Power | Lincoln Electric CV-300

B-6	OPERATION	B-6

STARTING THE MACHINE

The power switch at the extreme right side of the con- trol panel energizes the CV-300.

ADJUSTING THE OUTPUT VOLTAGE USING THE DIGITAL METER

The digital meters in the CV-300 incorporate a voltage pre- set function. This allows the operator to set the desired welding voltage before striking an arc. The digital meters can also display welding current.

To make use of the voltage preset function, the Volts/Amps switch must be in the "Volts" position. Turn the Voltage Adjust knob until the digital meter displays the desired weld- ing voltage. (See below if an external power source remote control is installed.)

When an arc is struck, the digital meter displays the actual welding voltage, as measured at the CV-300 output termi- nals.

NOTE: The arc voltage at the electrode may be as much as two volts different from the CV-300 output terminal voltage. This is due to voltage drops present in the welding cables, cable connections, and welding gun. To minimize these drops, use cables of ade- quate capacity, and make sure all connections are clean and tight. Because of these voltage drops, you may have to preset the CV-300 for a slightly higher welding voltage than your procedure calls for.

To read welding current, set the Volts/Amps switch to the "Amps" position. The welding current will be displayed whenever an arc is struck.

LOCAL/REMOTE SWITCH OPERATION

If voltage control is desired at the CV-300, the Local/Remote switch must be in the "Local" position. The Voltage Adjust on the front panel can be used to adjust the CV-300 output. (The remote control, even if connected, will have no effect if the switch is in the "Local" position).

To use a remote control, such as the K857 (see INSTALLA- TION section), place the Local/Remote switch (see Figure B.1) in the "Remote" position. The remote control now con- trols the output voltage, in the manner described above. This control may be adjusted while welding to change the CV-300 output.

AUXILIARY POWER

42 volt AC auxiliary power, as required for some wire feeders, is available through the wire feeder recepta- cle. A 10 amp circuit breaker protects the 42 volt cir- cuit from overloads.

CV-300 machines can also supply 115 volt AC auxil- iary power through the wire feeder receptacle. A 5 amp circuit breaker protects the 115 volt circuit from overloads.

NOTE: Do not use circuits 2 or 4 for control of auxil- iary loads. (The 2-4 circuit is isolated from the 31-32 and 41-42 circuits.)

CAUTION

Note that some types of equipment, especially pumps and large motors, have starting currents which are significantly higher than their running current. These higher starting currents may cause the circuit breaker to open. If this situation occurs, the user should refrain from using the CV-300 auxiliary power for that equip- ment.

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OVERLOAD PROTECTION

This welder has thermostatic protection from exces- sive duty cycles, overloads, loss of cooling, and high ambient temperatures. When the welder is subjected to an overload or loss of cooling, a thermostat will open. This condition will be indicated by the illumina- tion of the yellow Thermostatic Protection Light on the case front (see Figure B.1).The fan will continue to run to cool the power source. No welding is possible until the machine is allowed to cool and the Thermostatic Protection Light goes out.

CV-300

CV-300 specifications

The Lincoln Electric CV-300 is a highly regarded power source designed specifically for wire feed welding applications. This machine combines advanced technology with user-friendly features to meet the demanding needs of professional welders. Known for its reliability, efficiency, and versatility, the CV-300 is suitable for various welding processes, including MIG, flux-cored, and DC TIG welding.

One of the standout features of the CV-300 is its constant voltage design. This ensures a stable arc throughout the welding process, which is critical for achieving high-quality welds. The ability to maintain a consistent arc helps in reducing spatter and improves bead appearance, making it ideal for both novice and experienced welders.

The CV-300 is equipped with Lincoln Electric's exclusive Auto-Set technology. This feature simplifies the setup process significantly by allowing users to select the material type and thickness. The machine automatically adjusts the voltage and wire feed speed, ensuring optimal performance without requiring extensive knowledge of welding parameters from the operator.

Another defining characteristic of the CV-300 is its robust construction. Built to endure the rigors of the shop environment, the power source features a durable housing and components that withstand high heat and heavy use. Additionally, it is designed for easy access to internal components, facilitating maintenance and servicing when required.

Portability is another significant advantage of the Lincoln Electric CV-300. Weighing in at a manageable size, the power source can easily be transported to job sites or moved around the workshop, enhancing its usability. It is compatible with various wire feeders, making it an adaptable choice for different welding projects, whether it's light fabrication or heavier industrial work.

The CV-300 also supports a variety of input voltages, making it versatile for use in different settings. Its adaptability allows it to operate efficiently in various environments, ensuring that welders have the power they need at their fingertips.

In summary, the Lincoln Electric CV-300 is a formidable choice for those in need of reliable and powerful welding equipment. With features such as constant voltage output, Auto-Set technology, robust construction, and portability, it meets the demands of modern welding with ease, helping professionals achieve stunning results in their work.