Lincoln Electric Explore the Operational Features of the Lincoln DC 400 Welder

Page 23

B-7

OPERATION

B-7

 

 

 

In this position, the dynamic characteristics of the machine under welding conditions provide optimum welding characteristics for Innershield® welding, other open arc processes including short arc MIG welding, and air carbon arc. Most submerged arc welding can also be done in this mode.

The CV (Submerged Arc) Mode also produces an essentially flat output characteristic that can be varied from approximately 12 to 42 volts. The dynamic characteristics of the CV Submerged Arc Mode make possible improved submerged arc welding over that possible using the Constant Voltage Innershield Mode. The improvement is most noticeable on high deposition, slow travel speed welds.

There are no means provided to switch between any of the modes remotely. Do not change the position of the MODE SWITCH if output voltage or current is pre- sent as this may damage the switch.

The CC Mode permits the DC-400 to produce a con- stant current output characteristic through the range of 60-500 amps with an open circuit voltage of approxi- mately 57 volts (54V on 50/60 Hz). Stick welding and TIG are done with this position of the Mode Switch.

ARC FORCE CONTROL DIAL (Effective only in CC mode)

The ARC FORCE control is calibrated from one to ten. For most welding, the dial should be set at approxi- mately midrange, 5-6. Adjustments up or down can then be made depending on the electrode, proce- dures, and operator preference. Lower settings will provide less short circuit current and a softer arc. A setting that is too low may cause the electrode to stick in the puddle. Higher settings will provide a higher short circuit current and a more forceful arc. Excessive spatter may result if the control setting is too high. For most TIG welding applications adjust this control to a minimum for best operating character- istics.

ARC CONTROL SWITCH (Effective only in CV FCAW/GMAW mode)

The ARC CONTROL is a tapped switch numbered from 1 to 5 and changes the pinch effect of the arc. This control is most useful in processes that utilize a “shorting” metal transfer and controls the spatter, fluid- ity, and bead shape. The pinch effect is increased by turning the control clockwise.

For all applications, a good starting point for the ARC CONTROL is a midrange dial setting of 3. The control can be increased or decreased as desired.

OUTPUT TERMINALS SWITCH

The OUTPUT TERMINALS toggle switch on the con- trol panel labeled “REMOTE - ON” allows the welder output to be activated remotely or to be always on. For remote operation, the toggle switch is set in “REMOTE” position and the welder output will be acti- vated when 2 and 4 are closed when using a wire- feeder. For welder output to always be activated, set the switch to the “ON” position.

110-115V AC and 40-42V AC Auxiliary Power and Control Connections

14-PIN CONNECTOR

The 14-pin connector receptacle supplies auxiliary power.

40-42V AC is available at receptacle pins I and K. A 10 amp circuit breaker protects this circuit.

On the Domestic and Export models 110-115V AC is available at receptacle pins A and J. A 10 amp circuit breaker protects this circuit. Note that the 40-42V AC and 110-115V AC circuits are electrically isolated from each other.

FRONT VIEW OF 14-PIN

CONNECTOR RECEPTACLE

 

 

 

 

K = 4 2

 

 

 

A = 3 2

 

J = 3 1

 

 

 

 

 

B = G N D

 

I = 4 1

L = S P A R E

 

 

N = S P A R E

 

 

 

C = 2

 

 

H = 2 1

 

 

 

 

 

 

 

 

 

D = 4

 

G = 7 5

 

 

 

 

 

 

 

 

E = 7 7

 

F = 7 6

 

 

 

 

 

 

 

M = S P A R E

 

 

 

 

 

 

 

PIN

 

LEAD NO.

 

FUNCTION

 

 

 

 

 

 

 

 

 

 

 

 

 

A

 

32

110 - 115V AC

 

B

 

GND

CHASSIS CONNECTION

 

C

 

2

TRIGGER CIRCUIT

 

D

 

4

TRIGGER CIRCUIT

 

E

 

77

OUTPUT CONTROL

 

F

 

76

OUTPUT CONTROL

 

G

 

75

OUTPUT CONTROL

 

H

 

21

WORK CONNECTION

 

I

 

41

40-42V AC

 

J

 

31

110-115V AC

 

K

 

42

40-42V AC

 

L

 

---

---

 

 

M

 

---

---

 

 

N

 

---

---

 

 

 

 

 

 

 

DC-400

Image 23
Contents 10699 11038 11085 11128 11347 RED-D-ARC DC-400California Proposition 65 Warnings SafetyElectric Shock can kill Iii Welding Sparks can cause fire or explosionSûreté Pour Soudage a L’Arc Précautions DE SûretéOn-Line Product Registration Please Examine Carton and Equipment For Damage ImmediatelyTable of Contents Section E ViiSection D Height Width Depth Weight InstallationTechnical Specifications DC-400 Output Maximum Open Circuit Voltage Auxiliary PowerDuty Lengths Cycle Machine LoadCable 400A 100% 500A 50%Remote Control Adapter Cable K864 Multiprocess Switch K804-1 Operation Multiprocess Switch Connection and Operation PurposeConnection of DC-400 to LN-22 or LN-25 DesignOutput Connections Auxiliary Power ConnectionsRemote Control Connections Case FeaturesMachine & Circuit Protection Thermal Protection Light STICK, TIG or AIR/CARBON ARC Multiprocess SwitchElectric Shock can kill OperationARC Force Control Dial ARC Control SwitchOutput Terminals Switch Voltmeter Switch Rating PlateDegree of protection provided by the enclosure IP21Signifying the Earth Ground Connection DC-400 4OPERATIONB-4Earth Ground Connection Recommended Processes & Equipment Duty Cycle Amps Volts Power Source OperationVoltmeter Switch Duty Cycle and Time PeriodPIN Lead no Function ARC Force Control Dial Effective only in CC modeARC Control Switch Effective only in CV FCAW/GMAW mode Front View of 14-PIN Connector ReceptacleMachine and Circuit Protection Terminal Strip ConnectionsField Installed Options AccessoriesFactory Installed Options Undercarriages K817, K817R, K841 HI-FREQUENCY KIT K799 Codes 8634 and Above onlyRoutine Maintenance 1MAINTENANCED-1HOW to USE Troubleshooting Guide TroubleshootingContact your local Authorized Field Service Facility Output Control Local Your local Authorized Field Service FacilityPower I/0 Switch Check Procedure for Replacing PC BoardsConnecting the Remote Control to the Machine Fault Protection OperationPower Silicon Controlled Rectifier Test Remote Control CheckPower Diode Test Power Rectifier Bridge Assembly Checking ProcedureWiring Diagram for Code DiagramsPasted inside Number Wiring Diagram for Code 10699 and Above11085, 11128 Power Rectifier Bridge Diagram Type M12244-7 DC-400 32.00 15.39 30.92 30.02 +.11 Dimension PrintDC-400 Precaucion Warnung
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DC-400 specifications

The Lincoln Electric DC-400 is a versatile and robust DC arc welding power source designed to meet the demands of various industrial applications. Known for its reliability and performance, the DC-400 is ideal for both professional welders and fabrication shops requiring robust equipment that can handle challenging welding tasks.

One of the main features of the DC-400 is its ability to provide a smooth, stable arc, which is essential for achieving high-quality welds. This welding machine is capable of delivering a wide amperage range, typically from 20 to 400 amperes, making it suitable for various welding processes, including MIG, TIG, and Stick welding. The unit's high output capabilities allow it to effectively weld a variety of materials, such as steel, stainless steel, and various alloys.

In terms of technology, the DC-400 integrates advanced power conversion technology that enhances energy efficiency while minimizing heat loss during operation. This not only contributes to lower operating costs but also ensures a longer service life for the machine. The DC-400 features a durable, rugged design, with a robust steel frame that can withstand the rigors of heavy industrial use while providing an IP23 rating for protection against moisture and dust.

Another notable characteristic of the DC-400 is its ease of use. The intuitive controls allow for quick adjustments to settings, enabling welders to easily adapt to different job requirements. The arc characteristics of the DC-400 can be fine-tuned to optimize performance for different welding applications, ensuring consistent results every time.

Moreover, the DC-400 is equipped with built-in safety features such as thermal overload protection, which prevents damage to the machine in case of prolonged operation under heavy loads. This feature enhances the safety of the operator and extends the life of the welding machine.

Overall, the Lincoln Electric DC-400 stands out as a reliable and efficient welding power source. Its combination of high-performance capabilities, advanced technology, and next-level usability makes it a popular choice in the industry. Whether for heavy fabrication, maintenance, or repair work, the DC-400 continues to prove itself as an indispensable tool for professional welders seeking quality and durability in their equipment.