E-7

TROUBLESHOOTING

E-7

 

 

 

CONTROL PC BOARD CALIBRATION

CAUTION

THE SCR BRIDGE SHOULD BE CHECKED BEFORE INSTALLING A NEW CONTROL BOARD. COMPONENTS ON THE NEW CONTROL BOARD COULD BE DAMAGED BY A DEFECTIVE SCR BRIDGE.

NOTE: Before the PC Boards can be calibrated the machine must be "hot". That is, it should be run approximately one hour at maximum O.C.V. with all covers on the generator.

Factory replacement Control PC Boards are preset and should require only minor adjustment if any.

1.Before any calibrations are made, the engine speed must be correct. Check the engine speed as fol- lows:

a)Set toggle switch to variable voltage.

b)Set variable voltage control and portable field control to high.

c)Allow engine to warm up for approximately 15 minutes.

d)Using an accurate tachometer, check high idle engine speed. It must be within limits given on the nameplate. Adjust governor only if absolutely necessary. To obtain an accurate speed setting, the unit must be generating its maximum open circuit voltage (Step A.3 below). If no voltage is being gen- erated, this trouble must be first corrected before final speed setting is obtained.

MAX

MIN

Constant

-1-

-2-

Voltage Trimmers

 

 

 

 

MAX

MIN

Variable

-3-

-4-

Voltage Trimmers

 

 

 

 

 

 

 

 

A.Variable Voltage

1.Place toggle switch in variable voltage posi- tion.

2.Turn variable voltage control and portable field control to high.

3.Set Trimmer #3 so that OCV is 95±1 volts DC on SAM400 machines or 89±1 volts for SAM650 machines.

4.Turn variable voltage rheostat and portable field control to low.

5.Set Trimmer #4 so that OCV is 65±1 volts

DC on SAM400 machines or 45±1 volts for SAM650 machines. Recheck to make sure readings fall within limits. Trimmer #4 set- ting is dependent on Trimmer #3.

B.Constant Voltage

1.Place toggle switch in constant voltage position.

2.Turn constant voltage rheostat and portable field control to high.

3.Set Trimmer #1 so that OCV is 60±1 volts DC on SAM400 machines or 68±1 volts for SAM650 machines.

4.Turn constant voltage rheostat and portable field control to low.

5.Set Trimmer #2 so that OCV is 21± 0.5 volts DC on SAM400 machines or 22±0.5 volts for SAM650 machines. Recheck to make sure readings fall within limits. Trimmer #2 setting is dependent on Trimmer #1.

SAM400 & 650

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Lincoln Electric SAM400, SAM650 manual Control PC Board Calibration
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SAM650, SAM400 specifications

Lincoln Electric has long been synonymous with welding excellence, and its SAM series of advanced welding machines, including the SAM400 and SAM650, epitomizes this commitment to quality and innovation. These models are designed to meet the demands of diverse industrial applications while ensuring ease of use, efficiency, and precision.

The SAM400 is a robust multiprocess welding system that supports MIG, TIG, Stick, and Flux-Cored welding techniques. It features a powerful 400 Amp output, suitable for heavy-duty applications and capable of handling materials such as steel, stainless steel, and aluminum. The machine incorporates advanced inverter technology, resulting in a compact design that significantly reduces the weight while enhancing portability. Furthermore, the SAM400 includes intuitive digital controls, allowing operators to easily adjust settings for optimal performance. Its PAS (Power Adapter System) compatibility enables users to seamlessly integrate different power sources, greatly enhancing its versatility.

On the other hand, the SAM650 takes it a step further, boasting a maximum output of 650 Amps. This model is particularly favored in industries requiring high deposition rates, such as shipbuilding and heavy fabrication. Like the SAM400, the SAM650 features multiprocess capabilities but adds enhanced control mechanisms, such as advanced waveform technology, which allows for better arc stability and reduced spatter. This ensures cleaner welds and, ultimately, a superior finish. Additionally, the SAM650 is equipped with Lincoln Electric's proprietary welding technology, including the Arc Control and Hot Start features that enhance user experience by providing smoother starts and consistent performance, even in challenging conditions.

Both machines come with integrated wire feeders that allow for easy adjustments and quick material changes, offering increased productivity on the job site. Their rugged design and durable construction ensure long-lasting performance, even in the harshest environments.

In conclusion, the Lincoln Electric SAM400 and SAM650 welding systems are trailblazers in the field of welding technology. With their powerful output, advanced features, and user-friendly interfaces, these machines cater to the needs of professionals looking for reliability and efficiency in their welding applications. Whether for small shops or large-scale industrial operations, the SAM400 and SAM650 deliver the performance and versatility that fabricators and welders depend on.
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